Agenda packet, regular meeting, first session — Antioch City Council, August 25, 2026 (part 2 of 5)

Below is the list of agencies that City staff notiﬁed regarding the City of Antioch’s 2025 Urban Water Management Plan Update. Attached is a copy of the letter that was sent.

Agency Addressed to Notiﬁcation Date Returned Mail
Receipt (Y/N)
City of Brentwood Casey Wichert, Public
Works Director
April 8, 2026 No
City of Martinez Joe Enke, PW
Director/City Engineer
April 9, 2026 No
City of Pittsburg John Samuelson, PW
Director/City Engineer
April 8, 2026 Yes
Contra Costa County Monica Nino, County
Administrator
April 8, 2026 Yes
Contra Costa Water
District
Rachel Murphy, General
Manager
April 8, 2026 Yes
Delta Diablo Vince DeLange, General
Manager
April 8, 2026 No
Diablo Water Nacho Mendoza, Water
Operations Manager
April 8, 2026 Yes

Notice of Preparation – 2025 UWMP Update

Page 2 of 2 ends

City of Antioch
2025 Urban Water Management Plan
August 2026

Appendix D

Water Loss Audits
(20 20-2025)

Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 3 5,203.880 MG/Yr 5 MG/Yr
Water imported: n/a 0.000 MG/Yr MG/Yr
Water exported: n/a MG/Yr MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 5,203.087 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 7 4,574.558 MG/Yr
Billed unmetered: 10 2.474 MG/Yr
Unbilled metered: 9 478.553 MG/Yr Pcnt: Value:

Unbilled unmetered: 9 21.400 MG/Yr 1.25% MG/Yr 24061
AUTHORIZED CONSUMPTION: 5,076.985 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 126.102 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 13.008 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 7 46.406 MG/Yr 0.91% MG/Yr Systematic data handling errors: 5 11.436 MG/Yr 0.25% MG/Yr Apparent Losses: 70.850 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 55.252 MG/Yr WATER LOSSES: 126.102 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 626.055 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 402.2 miles
Number of active AND inactive service connections: 9 33,014 Service connection density: 82 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 5 67.0 psi

COST DATA
Total annual cost of operating water system: 10 $46,661,989 $/Year Customer retail unit cost (applied to Apparent Loss es): 9 $4.66 Variable production cost (applied to Real Losses): 5 $2,838.41 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Variable production cost (applied to Real Losses)
3: Billed metered
Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? AWWA Free Water Audit Software:

Reporting Worksheet

21.400
2021 7/2020 - 6/2021
City of Antioch (CA0710001)
*** YOUR SCORE IS: 60 out of 100 ***
A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score

0.793
Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Based on the information provided, audit accuracy can be improved by addressing the following components:
$/100 cubic feet (ccf)
<----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed ?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property boundary,
that is the responsibility of the utility)
Use buttons to select
percentage of water supplied
OR
value
?Click here:
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

Copyright © 2014, All Rights Reserved.
?
?
?
+
+
+
+
+
+
+
+
+
+
+
+
+ Use Customer Retail Unit Cost to value real losses
?
To select the correct data grading for each input, determine the highest grade where the utility meets or exceeds all criteria for that grade and all grades below it.

AWWA Free Water Audit Software v5.0 Reporting Worksh eet 1 Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 3 4,787.036 MG/Yr 5 MG/Yr
Water imported: 5 176.302 MG/Yr MG/Yr
Water exported: n/a MG/Yr MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 4,963.338 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 7 4,225.370 MG/Yr
Billed unmetered: 10 3.368 MG/Yr
Unbilled metered: 9 410.679 MG/Yr Pcnt: Value:

Unbilled unmetered: 9 19.560 MG/Yr 1.25% MG/Yr 24061
AUTHORIZED CONSUMPTION: 4,658.977 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 304.361 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 12.408 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 7 31.741 MG/Yr 0.68% MG/Yr Systematic data handling errors: 5 10.563 MG/Yr 0.25% MG/Yr Apparent Losses: 54.713 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 249.649 MG/Yr WATER LOSSES: 304.361 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 734.600 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 406.5 miles
Number of active AND inactive service connections: 9 33,595 Service connection density: 83 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 5 71.2 psi

COST DATA
Total annual cost of operating water system: 10 $49,622,271 $/Year Customer retail unit cost (applied to Apparent Losses): 9 $4.63 Variable production cost (applied to Real Losses): 5 $2,913.40 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

Reporting Worksheet

19.560
2022 7/2021 - 6/2022
City of Antioch (CA0710001)
*** YOUR SCORE IS: 61 out of 100 ***
A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Based on the information provided, audit accuracy can be improved by addressing the following components:
$/100 cubic feet (ccf)
<----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed ?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property
boundary, that is the responsibility of the utility)
Use buttons to select
percentage of water supplied
OR
value
?Click here:
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

AWWA Free Water Audit Software v5.0 Reporting Worksheet 1 Water Audit Report for:

Audit Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR WATER SUPPLIED choose entry option:

VOS Volume from Own Sources: n g 3 3,926.768 MG/Yr n g 8 volume MG/Yr over-registration VOSEA WI Water Imported: n g 3 653.510 MG/Yr n g 4 percent MG/Yr select….. WIEA WE Water Exported: n g n/a 0.000 MG/Yr n g n/a percent MG/Yr select….. WEEA 4,577.112 MG/Yr
.

AUTHORIZED CONSUMPTION
BMAC Billed Metered: n g 8 4,027.160 MG/Yr
BUAC Billed Unmetered: n g 2 0.001 MG/Yr
UMAC Unbilled Metered: n g 2 425.950 MG/Yr choose entry option:

UUAC Unbilled Unmetered: n g 10 8.420 MG/Yr 0.25% custom MG/Yr 24061 4,461.531 MG/Yr
WATER LOSSES 115.581 MG/Yr
Apparent Losses
Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option:

SDHE Systematic Data Handling Errors: n g 3 10.068 MG/Yr 0.25% default MG/Yr CMI Customer Metering Inaccuracies: n g 3 39.082 MG/Yr 0.87% percent MG/Yr under-registration UC Unauthorized Consumption: n g 3 10.068 MG/Yr 0.25% default MG/Yr Default option selected for Unauthorized Consumption, with automatic data grading of 3

59.218 MG/Yr
Real Losses

56.363 MG/Yr
115.581 MG/Yr

NON-REVENUE WATER
549.951 MG/Yr

SYSTEM DATA
Lm Length of mains: n g 10 406.3 miles (including fire hydrant lead lengths) Nc Number of service connections: n g 10 33,926 (active and inactive) Service connection density: 84 conn./mile main
Yes
Lp Average length of (private) customer service line: n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure: n g 7 69.0 psi

COST DATA
CRUC Customer Retail Unit Charge: n g 7 $4.55
VPC Variable Production Cost: n g 10 $2,647.54 $/Million gallons $/yr (optional input) WATER AUDIT DATA VALIDITY TIER:
go to
dashboard
PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS:

Based on the information provided, audit reliabili ty can be most improved by addressing the following components: OPTIONAL: If targets exist for the op erational performance indicators, they can be input below:
1: Volume from Own Sources (VOS) Unit Total Losses: gal/conn/day 2: Billed Unmetered (BUAC) Unit Apparent Losses: 5.2 gal/conn/day 3: Customer Metering Inaccuracies (CMI) Unit Real Losses A: 9.5 gal/conn/day Unit Real Losses B: gal/mile/day
If entered above by user, targets will display on KPI gauges (see Dashboard) go to start page
NON-REVENUE WATER:

If entering an
Error Adjustment,
select under- or over-
registration
WATER SUPPLIED:

AUTHORIZED CONSUMPTION:

Apparent Losses:

Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier III (51-70). See Dashboard tab for additional outputs. *** $/100 cubic feet (ccf)
$35,235,586
Total Annual Operating Cost
Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software:

Worksheet

8.420
City of Antioch

3.166
Jul 01 2022 - Jun 30 2023
Water Supplied Error Adjustments
Fiscal 2023
Real Losses:

WATER LOSSES:

Click 'g' to determine data validity grade
Click 'n' to add notes
FWAS v6.0
American Water Works Association.

To access definitions, click the input name
To edit water system info:

AWWA Free Water Audit Software v6.0 Worksheet 1
Water Audit Report for:

Audit Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR WATER SUPPLIED choose entry option:

VOS Volume from Own Sources: n g 4 4,548.534 MG/Yr n g 10 volume MG/Yr under-registration VOSEA WI Water Imported: n g 4 174.170 MG/Yr n g 5 percent MG/Yr select….. WIEA WE Water Exported: n g n/a 0.000 MG/Yr n g n/a percent MG/Yr select….. WEEA 4,722.704 MG/Yr
.

AUTHORIZED CONSUMPTION
BMAC Billed Metered: n g 8 3,734.408 MG/Yr
BUAC Billed Unmetered: n g 1 0.010 MG/Yr
UMAC Unbilled Metered: n g 10 672.570 MG/Yr choose entry option:

UUAC Unbilled Unmetered: n g 3 9.336 MG/Yr 0.25% default MG/Yr 24061 Default option selected for Unbilled Unmetered, with automatic data grading of 3 4,416.324 MG/Yr
WATER LOSSES 306.380 MG/Yr
Apparent Losses
Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option:

SDHE Systematic Data Handling Errors: n g 3 9.336 MG/Yr 0.25% default MG/Yr CMI Customer Metering Inaccuracies: n g 1 38.677 MG/Yr 0.87% percent MG/Yr under-registration UC Unauthorized Consumption: n g 3 9.336 MG/Yr 0.25% default MG/Yr Default option selected for Unauthorized Consumption, with automatic data grading of 3

57.349 MG/Yr
Real Losses
249.031 MG/Yr
306.380 MG/Yr

NON-REVENUE WATER
988.286 MG/Yr

SYSTEM DATA
Lm Length of mains: n g 8 406.9 miles (including fire hydrant lead lengths) Nc Number of service connections: n g 10 34,569 (active and inactive) Service connection density: 85 conn./mile main
Yes
Lp Average length of (private) customer service line: n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure: n g 6 84.3 psi

COST DATA
CRUC Customer Retail Unit Charge: n g 7 $4.64
VPC Variable Production Cost: n g 1 $3,432.36 $/Million gallons $/yr (optional input) WATER AUDIT DATA VALIDITY TIER:
go to
dashboard
PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS:

Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the op erational performance indicators, they can be input below:
1: Volume from Own Sources (VOS) Unit Total Losses: gal/conn/day 2: Billed Unmetered (BUAC) Unit Apparent Losses: gal/conn/day 3: Customer Metering Inaccuracies (CMI) Unit Real Losses A: gal/conn/day Unit Real Losses B: gal/mile/day
If entered above by user, targets will display on KPI gauges (see Dashboard) Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software:

Worksheet
City of Antioch
Jul 01 2023 - Jun 30 2024
Water Supplied Error Adjustments
Fiscal 2024
Real Losses:

WATER LOSSES:

Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier II (26-50). See Dashboard tab for additional outputs. *** $/100 cubic feet (ccf)
$40,467,363
Total Annual Operating Cost
go to start page
NON-REVENUE WATER:

If entering an
Error Adjustment,
select under- or over-
registration
WATER SUPPLIED:

AUTHORIZED CONSUMPTION:

Apparent Losses:

Click 'g' to determine data validity grade
Click 'n' to add notes
FWAS v6.0
American Water Works Association.

To access definitions, click the input name
To edit water system info:

AWWA Free Water Audit Software v6.0 Worksheet 1
Water Audit Report for:

Audit Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR WATER SUPPLIED choose entry option:

VOS Volume from Own Sources: n g 7 5,208.704 MG/Yr n g 10 volume MG/Yr over-registration VOSEA WI Water Imported: n g n/a 0.000 MG/Yr n g n/a percent MG/Yr select….. WIEA WE Water Exported: n g n/a 0.000 MG/Yr n g n/a percent MG/Yr select….. WEEA 5,207.720 MG/Yr
.

AUTHORIZED CONSUMPTION
BMAC Billed Metered: n g 8 4,304.799 MG/Yr
BUAC Billed Unmetered: n g n/a MG/Yr
UMAC Unbilled Metered: n g 10 442.161 MG/Yr choose entry option:

UUAC Unbilled Unmetered: n g 3 10.762 MG/Yr 0.25% default MG/Yr24061 Default option selected for Unbilled Unmetered, with automatic data grading of 3 4,757.722 MG/Yr
WATER LOSSES 449.998 MG/Yr
Apparent Losses
Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option:

SDHE Systematic Data Handling Errors: n g 3 10.762 MG/Yr 0.25% default MG/Yr CMI Customer Metering Inaccuracies: n g 1 41.661 MG/Yr 0.87% percent MG/Yr under-registration UC Unauthorized Consumption: n g 3 10.762 MG/Yr 0.25% default MG/Yr Default option selected for Unauthorized Consumption, with automatic data grading of 3

63.185 MG/Yr
Real Losses
386.813 MG/Yr
449.998 MG/Yr

NON-REVENUE WATER
902.921 MG/Yr

SYSTEM DATA
Lm Length of mains: n g 10 381.3 miles (including fire hydrant lead lengths) Nc Number of service connections: n g 8 34,668 (active and inactive) Service connection density: 91 conn./mile main
Yes
Lp Average length of (private) customer service line: n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure: n g 7 65.1 psi

COST DATA
CRUC Customer Retail Unit Charge: n g 7 $4.67
VPC Variable Production Cost: n g 8 $303.37 $/Million gallons $/yr (optional input) WATER AUDIT DATA VALIDITY TIER:
go to
dashboard
PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS:

Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the operational performance indicators, they can be input below:
1: Volume from Own Sources (VOS) Unit Total Losses: gal/conn/day 2: Customer Metering Inaccuracies (CMI) Unit Apparent Losses: gal/conn/day 3: Billed Metered (BMAC) Unit Real LossesA: gal/conn/day Unit Real LossesB: gal/mile/day
If entered above by user, targets will display on KPI gauges (see Dashboard) go to start page
NON-REVENUE WATER:

If entering an
Error Adjustment,
select under- or over-
registration
WATER SUPPLIED:

AUTHORIZED CONSUMPTION:

Apparent Losses:

Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier III (51-70). See Dashboard tab for additional outputs. *** $/100 cubic feet (ccf)
$42,848,565
Total Annual Operating Cost
Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software:

Worksheet
City of Antioch

0.984
Jul 01 2024 - Jun 30 2025
Water Supplied Error Adjustments
Fiscal2025
Real Losses:

WATER LOSSES:

Click 'g' to determine data validity grade
Click 'n' to add notes
FWAS v6.0
American Water Works Association.

To access definitions, click the input name
To edit water system info:

AWWA Free Water Audit Software v6.0 Worksheet 2
City of Antioch
2025 Urban Water Management Plan
August 2026

Appendix E

Agreement s & Water Rights

TREATED WATER SERVICE AMENDATORY AGREEMENT
Between
Contra Costa Water District and
the City of Antioch
Contract # 2 3: DO\
BOD Date I Z -07 - .l:L
Executed O 2 - 2 ?!-:2.>
·~ '
This Agreement is entered into this ze day of MO\VC" 2023 between the Contra Costa Water District (hereinafter referred to as "CCWD" or the "District}/), a county water district organized and existing under Division 12, commencing with Section 30000, of the California Water Code, and the City of Antioch (hereinafter referred to as the "City" or "Antioch"), a general law city. This Agreement amends and restates, and further clarifies and defines, the terms and conditions of the Agreement dated December 5, 2001 by and between the Parties.

RECITALS

1. The City requires a reliable supply of treated water for use within the City's service area to supplement its existing treated water capacity on a long-term basis.

2. Pursuant to CCWD's Regulations, the City has historically purchased raw water from the District as a Raw Water Municipal customer on demand.

3. The District, as part of a Joint Powers Authority ("JPA'') formed as of June 6, 1989 between CCWD and the Diablo Water District ("DWD"), planned, designed, constructed and financed the Randall Bold Water Treatment Plant ("RBWTP") and related facilities to serve growth in the District's Treated Water Service Area as well as potentially to serve treated water on a wholesale basis in East Contra Costa County.

4. The District's own ·ership in the RBWTP is 35 million gallons per day ("MGD") of treated water production capacity, which is 70% of the current total plant capacity of 50 MGD.

5. A portion of the District's share of RBWTP capacity is not anticipated to be required to supply treated water in the District's Treated Water Service Area, so there is sufficient plant capacity to provide up to ten (10} MGD of treated water to the City of Antioch.

6. The City and the District entered into an interim treated water supply agreement in May 2001 on a capacity rental basis from the RBWTP while the City evaluated its supplemental treated water capacity alternatives.

7. The City and the District entered into a Treated Water Service Agreement on December 5, 2001 (the "Previous Agreement") to supplement the City's existing water treatment capacity from the District's portion of the RBWTP from an interconnection that was cons_tructed between the District's MPP and the City's Hillcrest Booster Pumping Station.

8. The City and CCWD now find it in their best interests to enter into this Agreement effective on the date first set forth above, in order to amend portions of the agreement to recognize that certain requirements of the agreements have been successfully completed and to amend and clarify terms of the Previous Agreement.

AGREEMENT
In recognition of the foregoing Recitals, the parties agree as follows:

1. EFFECTIVE DATE: This Agreement shall become effective on the date of the final signature hereon by the duly authorized representatives of each party, which shall be the date written above (the "Effective Date"). For avoidance of doubt, the Parties hereby confirm that, as of the Effective Date, this Agreement shall supersede the Previous Agreement and the Previous Agreement shall have no further force and effect.

2. DISTRICT REGULATIONS: Except as otherwise expressly provided herein, CCWD's Code of Regulations ("the Regulations"), including the Municipal Untreated Water rates and charges therein and any amendments to the Regulations which may be from time to time adopted by the District's Board of Directors, shall apply to and govern all aspects of the relationship between the District and the City regarding the provision of treated water pursuant to this Agreement and of the raw water component of treated water service. All such exceptions herein have been determined by CCWD to be necessary, and represent determinations made by the Board of Directors in the exercise of its legislative authority and responsibility.

3. TERM OF AGREEMENT: The Term of this Agreement shall commence on the Effective Date and shall continue in effect for as long as the District operates the RBWTP, and the City retains the capacity rights described in this Agreement. Notwithstanding the foregoing, the parties may mutually agree to terminate the Agreement at any time and either party may terminate the Agreement in the event of a material breach (including the City's failure to comply with the Regulations and pays all the rates and charges described herein for the services provided by the District) that remains uncured 30 days following written notice specifying in reasonable detail the nature and extent of the breach {a "default"); provided, however, that if the nature of the obligation is such that more than 30 days are required for its performance, then the party alleged to be in breach shall not be deemed to be in default if it commences performance within the 30- day cure period and thereafter diligently pursues the cure to completion.

4. TREATED WATER SERVICE: To meet its obligations under this Agreement, the District shall treat and convey water to the City from one or more of the District's available water sources using CCWD's 35 MGD share of the 50 MGD capacity of the RBWTP (DWD's 15 MGD·share of plant capacity is not available to either CCWD or City pursuant to this Agreement). It is the intent of CCWD to provide treated water to Antioch in accordance with the terms of Article 7 of the JPA.

The District may also elect, from time to time and in its sole discretion, to deliver water to the City from its Bollman Water Treatment Plant. Should treated water be delivered from the Bollman Water Treatment Plant, for payment purposes, the water will be paid for as though it had been produced and delivered from the RBWTP.
a. Delivery. The District shall deliver treated water through its Multi-Purpose Pipeline ("MPP") through an existing meter located at the MPP interconnection (the "Point of Delivery") to the City's Hillcrest Booster Pump Station ("HBPS"). The City owns and shall be responsible to operate and maintain the interconnection facilities from the discharge side of the backflow prevention device to the HBPS. The District owns and shall be responsible to operate and maintain the interconnection facilities from the MPP to the 2 discharge side of the backflow prevention device. The parties may mutually agree to change the location of the Point of Delivery to meet operational or regulatory requirements.
b. Priority. The Parties hereby acknowledge and agree that the City shall be entitled to purchase treated water under this Agreement from CCWD according to the same priority as CCWD's other wholesale treated water customers.
c. Measurement of Water Deliveries. Except as otherwise provided, for purposes of this Agreement, the quantity of water treated at the RBWTP for the City shall be the quantity measured at the Point of Delivery plus Plant Loss ("Delivered Water''). Plant Loss is defined as the difference between water measured at the RBWTP intake meter and water measured at the RBWTP effluent meter(s). The City's portion of this loss is the ratio of the
quantity measured at the Point of Delivery to the total quantity measured at the RBWTP effluent meter(s).
d. Emergency Conditions. In the event of an Emergency, the City may request additional treated water deliveries, which would be subject to the approval of the District. i. For the purposes of this subparagraph, "Emergency" shall be defined to mean a condition caused by a sudden, unforeseen, and unanticipated occurrence or event such as an earthquake, flood, severe fire, or storm, unexpected and extended power or equipment outage, significant hazardous material spill or leak, or other similar sudden1 unforeseen1 and unanticipated event which significantly impairs the City's water treatment and delivery capacity. ii. In the event of an Emergency, the City shall notify the District's 24-hour Emergency Operator at {925) 625-6524 of the nature and extent of the emergency, and of the amount and timing of the City's need for water. The City shall confirm this request for emergency assistance in writing within one working day. The District shall, in its sole discretion, determine if it has capacity available to respond to the City's request and shall notify the City of its response as soon as possible following the initial verbal request. The District's approval of any such· City request shall not be unreasonably withheld. To the extent that the District is able to provide water to the City in response to such a request for emergency assistance, it shall do so solely for the duration of the emergency. e. Temporary Dis_ruption of Service. Although it is not the District's intent to interrupt or discontinue treated water deliveries to any wholesale customer, CCWD may temporarily reduce the quantities of treated water delivered, or may discontinue the delivery of treated water to the City, to enable CCWD to perform necessary inspection, repair, or replacement of any portion of the facilities that are then used to divert, convey, treat, and deliver water to the City pursuant to this Agreement.

In the event of any such reduction in deliveries of treated water, the City shall receive from CCWD a share of the reduced quantities available for delivery from RBWTP, based 3 on its proportionate share of water treatment capacity rights at the RBWTP relative to the District's total rated water treatment plant capacity.

CCWD shall provide the City with as much advance notice as is practicable of any such discontinuance of, or reduction in the delivery of water to the City. CCWD shall not be liable for failure to deliver water to the City if such failure is caused by any reason beyond the reasonable control of CCWD or any Emergency, as that term is defined for the purposes of subparagraph d of Section 4 of this Agreement.

In the event that water cannot be delivered from the RBWTP, but the MPP is operational then the District shall, if practical, serve treated water to the City from its Bollman Water Treatment Plant via the MPP. Should CCWD not be able to deliver treated water to the City from the MPP for any reason, the City may continue to take treated water from the CCWD portion of the RBWTP through its emergency connection with Diablo Water District.
f. Relationship to Minimum Take Requirement. The treated water purchased by the City pursuant to this Agreement shall also be included as part of the City's minimum annual quantity to be taken and/or paid for by the City in accordance with a Raw Water Service Agreement between the District and the City dated July 5, 2000.

5. PRINCIPLES OF CAPITAL COST REIMBURSEMENT:
a. The City has purchased a right to capacity in the RBWTP in accordance with the Previous Agreement of approximately 8.42 MGD as of March 31, 2022. The City has the right under the Previous Agreement to purchase additional capacity rights to the RBWTP of up to 10 MGD, which right is continued under this Agreement. The amount to be paid per MGD of capacity right purchased shall be $1,121.38 per equivalent 5/8" connection, which amount, pursuant to the Previous Agreement, is based on the avoided costs of the City not expanding its existing water treatment plant as determined in a joint study completed in 2003. Additional capacity rights up to 10 MGD will be purchased incrementally as new meters are issued by the City for connection to its treated water distribution system.
b. If and when the City upwades, changes, or modifies its existing water treatment plant - as required to meet existing or future mandated regulatory requirements that are currently met by the existing capabilities of the District's RBWTP, such as disinfection improvements, coagulation, filter upgrades, and similar - the avoided costs used to determine the capacity right purchase price for the RBWTP shall be recalculated and redetermined by the parties using a mutually agreeable methodology and shall be proportionate to the benefits received by the City. Upgrades to the City's water treatment plant to meet future mandated regulatory requirements that also require upgrades to the RBWTP shall not result in redetermination of avoided costs. c. The City shall pay a proportionate share of: 1) capital renewal/replacement costs; and, 2) improvements to the RBWTP or associated facilities that are deemed reasonably necessary in the opinion of CCWD to comply with final or reasonably anticipated changes to any federal or state regulatory requirement. The City's cost will be based on the 4 proportion of the City's then-current right to capacity (up to 10 MGD, or other amount as may be determined in the future) to the total capacity of the RBWTP (total capacity is currently 50 MGD) or associated facilities at the time such improvements are to be completed.
d. If the proposed improvements to the RBWTP provided for in subparagraph c of this Section 5 are not deemed reasonably necessary in the opinion of CCWD to comply with final or reasonably anticipated changes to any federal or state regulatory requirements, the City shall be consulted in advance of the work, and mutual agreement will be reached as to the scope of the project, the proportionate share of the costs to be allocated to the City, and the timing for repayment. The parties hereby agree that the key principle for reaching such an agreement is that the City's share of repayment shall be proportionate to its capacity rights in the facility, unless the benefits received from the improvements disproportionately benefit other owners of capacity in the RBWTP. e. CCWD will identify capital renewal/replacement and improvement costs through its biennial update of the Ten-Vear Capital Improvement Program and Financial Plan ("CIP"), which is updated and presented to the CCWD Board of Directors biennially typically in February. In conjunction with those biennial updates to the CIP, the District shall provide the City with its ten-year forecast of upcoming capital projects and the anticipated costs for the RBWTP and associated facilities. So that the City may express its views on the projects and costs if it desires, the District shall provide such information to the City a reasonable period of time prior to the CIP's presentation to the District's Board of Directors (historically the draft CIP is provided in January every two years prior to its adoption in February of that year). Notwithstanding the foregoing, CCWD, specifically its Board of Directors, retains its full authority and discretion to adopt or approve the CIP as it deems to be in the best interests of the District and its residents with or without inclusion of the comments or views of the City.

6. CAPITAL COST PAYMENT:
a. The City has paid for capacity rights at the RBWTP based on the avoided cost estimate per MGD to expand capacity at the City's wat~r treatment plant, and the incremental costs of $250,000 to increase the MPP pump capacity by 10 MGD to accommodate deliveries of treated water to the City.
b. Payment for incremental capacity rights beyond the now-existing capacity right, up to 10 MGD total, shall be paid monthly at a rate per equivalent 5/8-inch meter issued by the City for interconnection to the City's distribution system for that month. The rate shall be as set forth in subparagraph a of Section 5.
c. The amount to be paid to the District for each equivalent 5/8-inch meter was determined as the avoided cost per MGD of treatment divided by 714. This represents an assumed peak demand per equivalent 5/8-inch meter of 1,400 gallons per day. d. Should the peak daily water use by the City at any time exceed the amount of the capacity rights then purchased by the City, other than for emergency purposes as described above, the District will notify the City of the exceedance within sixty (60) days, 5 and the City shall remit payment for the additional capacity rights, which shall increase the City1s capacity rights to that level, based
1 on the amount of the exceedance.

7. PRINCIPLES OF OPERATING AND MAINTENANCE COST REIMBURSEMENT a. Rates for treated water service shall reimburse CCWD for actual operating, maintenance, and administrative costs of treating water at the RBWTP as well as a proportionate share of treatment plant maintenance projects (e.g., granulated activated charcoal media replacement, chemical feed system rehabilitation, and similar projects). b. Rates for treated water service shall reimburse CCWD for the actual costs of delivering treated water to Antioch via the MPP.

8. TREATED WATER SERVICE PAYMENTS: On a monthly basis, unless otherwise agreed by the parties, CCWD shall invoice and Antioch shall pay the following rates and charges for the delivery and treatment of water:
a. Untreated Water rates and charges:
i. The wholesale municipal untreated water rates as set forth in the District's Code of Regulations Section 5.20.010, as these rates may be amended from time to time by the District's Board of Directors.
ii. For each added or enlarged meter, the facilities component of the wholesale municipal untreated water rate in the amount specified in the applicable table in Section 5.20.010 of the District's Code of Regulations, as this amount may be amended from time to time by the District's Board of Directors. b. Charges for treated water service:
i. Fixed Treatment Costs. Fixed costs shall include all operation, maintenance, routine repair and replacement, improvements, and reasonable administration costs that do not vary according to the quantity of water treated at the RBWTP or delivered through associated facilities. The portion of the total fixed costs (of both treatment and delivery) to be borne by the City will be calculated based on the ratio of the City's then-current capacity rights to CCWD's total capacity ownership in the RBWTP for the relevant year (e.g., then current capacity right [8.42 MGD as of March 31, 2022] divided by CCWD's 35 MGD) multiplied by CCWD's fixed costs for its share of the RBWTP and associated facilities, as determined pursuant to the JPA. For the purposes of monthly billing, the City's share of fixed costs will then be calculated per acre-foot based on the estimated quantity of Delivered Water during the year.
ii. Variable Treatment Costs. Variable costs shall include all operation, maintenance, routine repair and replacement, and reasonable administration costs that vary according to the quantity of water treated at the RBWTP or according to the quantity of water delivered through associated facilities, such as costs related to 6 the purchase of power and chemicals. The respective portions of the total variable costs of treatment and delivery to be borne by the City will be calculated based on the ratio of the estimated or actual quantity of Delivered Water during the year to the estimated or actual quantity of water treated for CCWD at the RBWTP. For the purposes of monthly billing, the City1s share of variable costs will then be calculated per acre foot based on the estimated quantity of Delivered Water and estimated variable costs during the year.
iii. MPP Delivery Costs. Costs to pump treated water from the RBWTP to the City through the MPP shall be based on the City's proportionate share of all treated water deliveries conveyed through the MPP. The cost per million gallons pumped shall be estimated at the beginning of each fiscal year and subject to 1 'true up"
based on actual costs at fiscal ye.ar end, as further described in subparagraph e of this Section 8.
iv. Example. An example of the determination of rates and charges for treated water service set out in Exhibit A.
c. Annual Water Usage Estimates. The City shall provide estimates of monthly water use by March 1 for the fiscal year beginning the following July 1. CCWD will provide the estimated total rate for treated water service to the City by April ~ for the fiscal year beginning the following July 1.
d. Budget. The City shall be invited to participate in the review process for each years proposed RBWTP budget and in review of the annual cost true-up process. e. Annual True-Up. No later than September 30 of each year, a cost per unit true-up will be completed to determine the City's share of actual costs for treated water from the RBWTP and for the costs of delivering treated water from the MPP for the completed fiscal year. If the City has paid more than its proportionate share of the actual costs, a credit will be issued. If the City has paid less than its proportionate share of the actual costs, an invoice will be presented by the District for payment within thirty {30) days of its presentation.

9. WATER QUALITY:
a. CCWD is solely responsible for ensuring the quality of water, and for all aspects of compliance with applicable water quality regulations and standards, up to the point the water leaves the discharge side of the backflow prevention device at the MPP interconnection.
b. To ensure that water quality standards are maintained, the C_ity shall take minimum flows through the MPP interconnection of 100 gallons per minute. A blowoff valve was built as part of the interconnection and is owned and operated by the City.

CCWD acknowledges that the City uses an alternative surface water supply as a supplemental source of water and shall continue to do so. Similarly, this Agreement shall 7 not be interpreted to prohibit the City from developing or acquiring additional supplemental sources of water in the future.

The City is solely responsible for ensuring water quality, and for all aspects of compliance with applicable water quality regulations and standards from the Point of Delivery and throughout the City distribution system. ,Subject to the preceding provisions of this paragraph, the City shall be solely responsible to receive and respond to communications from customers within the City related to water quality concerns.

10. NO TRANSFER OF WATER RIGHTS:
a. There is no transfer of water rights from the Dis_trict to the City as a result of this Agreement.
b. There is no transfer of water rights from the City to the District as a result of this Agreement.

11. RESERVATION OF CAPACITY RIGHTS:
a. The parties acknowledge that the capacity rights described herein are for the sole use of the City and its customers pursuant to this Agreement and shall be available for the City's use for the life of the RBWTP.
b. Pursuant to the terms of this Agreement, the City will generally pay for capacity rights at the RBWTP as growth occurs up to a maximum of 10 MGD. The District shall reserve 10 MGD of capacity at the RBWTP for ultimate purchase and use by the City. c. Subject to subparagraphs d, e, f, and g of this Section 11, should the City determine that the City will not need, or does not desire, to purchase the full amount of reserved capacity of 10 MGD from the RBWTP, the City shall notify the District in writing of its intent to cap the City's capacity rights at a specified amount (a "Modified Reserved Capacity"). This amount shall be no less than the highest peak day of actual treated water deliveries from the District. The Modified Reserved Capacity amount shall then be incorporated into this agreement by amendment. Should the Modified Reserved Capacity purchased be exceeded at any subsequent time, additional payments shall be made in accordance with the terms of this Agreement.
d. Prior to planning and design of any expansion of the RBWTP, the District shall notify the City in writing of such planned expansion. The City shall respond to such a request within sixty (60) days of receiving the notification. The City shall in its response either: 1) confirm its intent and commit to purchase of capacity rights of 10 MGD; or, 2) reduce its commitment to purchase some lesser amount; or, 3) commit to the purchase of some greater amount of RBWTP treated water capacity that CCWD may make available from the 35 MGD of RBWTP capacity owned by CCWD. Should the City decrease or increase its capacity purchase commitment then this Modified Reserved Capacity shall then be incorporated into this Agreement by amendment.
e. Should the City elect to cap its reserved capacity at less than 10 MGD, after confirming its commitment to purchase capacity rights of 10 MGD or greater pursuant to the 8 notification process provided in subparagraph d of this Section 11, and the District has expanded, or is preparing to expand, the RBWTP; the District and the City will meet and attempt to determine an appropriate amount to be paid by the City to the District for the previously reserved capacity amount which shall not ultimately be purchased by the City. Such payment shall be the subject of a separate agreement, and if agreement cannot be reached between the parties, the amount to be compensated to the District by the City shall be subject to dispute resolution as provided for in Section 15 of this Agreement.
f. If the District and the City, pursuant to the processes of this Section 11, mutually determine that the District may defer expansion of the RBWTP because the City does not then require and does not foresee requiring its full 10 MGD allotment of RBWTP capacity at a given point in time and the District subsequently expands the RBWTP, the City will continue to maintain a reserved capacity of up to 10 MGD in the expanded RBWTP so long as the City has confirmed in writing its intent and commitment to ultimately purchase the full 10 MGD of reserved capacity.
g. If the City determines that the capacity rights that it has previously purchased are in excess to its needs, it shall so notify the District in writing detailing what portion of its capacity is excess to its needs (the "City Excess Capacity 11 ). Thereafter, the District and
the City will promptly meet and attempt to determine an appropriate amount, if any, to be reimbursed to the City by the District for the City Excess Capacity. Upon completion of any such transaction, the parties shall also determine the City1s ultimate Modified Reserved Capacity which shall then be incorporated into this Agreement by amendment.

Any reimbursement pursuant to this Subparagraph g shall be the subject of a separate agreement and shall consider all costs incurred by the District related to improvements made to RBWTP to provide for the previously purchased capacity in excess of the City1s needs, including the planning, design, or actual expansion of RBWTP and maintenance of excess capacity beyond that required by the District and its other customers (the 11 Base
Reimbursement Amount1'). The Base Reimbursement Amount shall not exceed the purchase price paid by the City escalated by the Bay Area Consumer Price Index, or other such index as agreed by the parties (the "Indexed Reimbursement Amount").

Notwithstanding the foregoing, if the District intends to sell additional capacity in RBWTP to a third party purchaser and requires capacity then reserved by the City for resale to the third party purchase, the District may request and the City may agree to make some portion·of its then reserved capacity available to the District for repurchase and resale to· the third party. If so, the City shall be entitled to receive in payment an amount equivalent to the Indexed Reimbursement Amount plus 50% of any additional amount paid to the District on a pro rata basis, less reasonable transaction costs. The amount of City capacity repurchased would be c~nsidered for the purposes of this Agreement to be City Excess Capacity and the then remaining City capacity would be considered Modified Reserved Capacity.

For avoidance of doubt, the following example demonstrates the operation of the foregoing:
9 In the event that the District determines that it requires 1 MGD of excess capacity from the City for a third party purchaser seeking to purchase 2 MGD of RBWTP capacity, the District could request that the City make capacity available for repurchase and resale. Should the City agree to make 1 MGD of capacity available for sale, the City would receive the Indexed Reimbursement Amount for the 1 MGD and a pro rata share of the amount in excess of the Indexed Reimbursement Amount received from the third party purchaser, less reasonable transaction costs.
h. Nothing in this Section 11, or in this Agreement, shall obligate District to reimburse City, or repurchase from City, any previously purchased capacity, except that the District shall have an obligation to negotiate in good faith on the price and terms of such a reimbursement or repurchase.

12. INTEGRATED AGREEMENT: This Agreement represents the entire agreement between the parties concerning long term treated water service. The Raw Water Service Agreement dated July 5, 2000 between the District and the City remains in full force and effect except that the treated water purchased by the City pursuant to this Agreement shall also be included as part of the City's minimum annual quantity to be taken and/or paid for by the City for purposes of the Raw Water Service Agreement.

13. AMENDMENTS: This Agreement may only be amended or modified in writing, signed by the duly authorized representatives of the parties hereto.

14. INDEMNIFICATION:
a. District. The District shall indemnify and hold the City, together with all of its affiliates, and their respective directors, officers and employees (each a "City Indemnified Party"}, harmless from and against any and all debts, claims, obligations, losses, costs, expenses, litigation proceedings, arbitration, investigations, damages, liabilities, payments or judgments incurred by any City Indemnified Party due to (i} any act or omission of the District, its directors, officers, agents, consultants or employees with respect to its obligations under this Agreement, including its delivery obligations to the City and operation, maintenance and management of the RBWTP and associated facilities; or {ii) a breach of any of the District's representations, warranties or covenants contained in this Agreement.
b. The City. The City shall indemnify and hold the District, together with all of its affiliates, and their respective directors, officers and employees (each a "the District Indemnified Party"), harmless from and against any and all debts, claims, obligations, losses, costs, expenses, litigation proceedings, arbitration, investigations, damages, liabilities, payments or judgments incurred by any the District Indemnified Party due to (i} any act or omission of the City, its directors, officers, agents, consultants or employees with respect to its obligations under this Agreement; or {ii) a breach of any of the City1s representations, warranties or covenants contained in this Agreement. c. Cure. Each Party shall promptly notify the other of the occurrence of any event claimed to constitute a breach of any representation, warranty or covenant in this Agreement or 10 otherwise giving rise to a claim for indemnification. The Party to whom the notification is given shall have a reasonable time to evaluate the claim and attempt to cure the cause of the claim. No.cure shall be considered effective unless it is completed within sixty (60) days from the date of notification.
d. Indemnification Claim Procedures. Promptly after any Party has received notice of any claim or the commencement of any action or proceeding which would give rise to a claim for indemnification, or has knowledge of any such claim, such Party shall, if a claim with respect thereto is to be made against any Party obligated to provide indemnification hereunder (the "Indemnifying Partyn), give the Indemnifying Party notice of such claim or the commencement of such action or proceeding, setting forth specifically the facts giving rise to, or alleged as a basis for, the claim, the amount of liability asserted, and accompanied by any documentation of such claim. The Indemnifying Party shall have the right to compromise or defend, at its own expense and by its own counsel, any such matter involving the asserted liability of the Party seeking indemnification; provided, however, that the Parties shall consult and cooperate where ongoing customer or supplier relationships are involved or would be affected. Such notice and the opportunity to compromise or defend shall be a condition precedent to any liability of the Indemnifying Party hereunder. If the Indemnifying Party shall undertake to compromise or defend any such action or proceeding or asserted liability, it shall promptly notify the Party seeking indemnification, who shall cooperate with the Indemnifying Party or its counsel in such defense against any asserted third party liability, including furnishing the indemnifying Party with any books, records or information reasonably requested, which are in the hands of the Party seeking indemnification. The Parties shall proceed in good faith to attempt to resolve any question of liability and the amount, if any, of damages thereby occasioned, as promptly as possible.

15. DISPUTE RESOLUTION:
a. Mediation. The parties agree to first submit any dispute arising out of or in connection with this Agreement to a mutually acceptable professional mediator and to negotiate in good faith toward an agreement with respect to the dispute. Either party within thirty (30) days of providing written notice may initiate mediation. Either party within sixty (60) days of having participated in the first mediation session may provide notice of termination of mediation and request Binding Arbitration. b. Binding Arbitration. Should the parties be unable or unwilling to resolve their dispute through the mediation process provided in Section 15.a above, either party may give written notice to the other party and elect to have the matter resolved by final and binding arbitration in accordance with the rules and procedures of the arbitrator selected in accordance with this Section. The party seeking arbitration shall set forth in its notice the particulars of its claims and shall state with specificity the issue(s) to be submitted to arbitration and the relief sought. Within thirty (30) days of the date of the election to arbitrate, the parties shall select a single, mutually agreeable arbitrator. If the parties are unable to agree, they shall request that the Judicial Arbitration and Mediation Service, Inc. ("JAMS") if such entity is then in existence, appoint an Arbitrator in accordance with then-current procedures. The arbitrator shall be a retired judge of the Superior Court of California, or a justice of the Court of Appeal of California, or a retired 11 judge of the United States District Court sitting in California. If JAMS is not in existence, the Presiding Judge of the Contra Costa Superior Court (Unlimited Jurisdiction) shall appoint an Arbitrator in accordance with its then-current procedures. The rules and procedures for arbitration shall be as follows:
i. The Arbitrator shall be selected and arbitration shall be conducted within a reasonable time, but in no event later than ninety (90) days after the date upon which the demand for arbitration is filed.
ii. The arbitration proceedings _shall be conducted in Contra Costa County, California, at a time and location as agreed to in writing by the parties, or in absence of an agreement, as designated by the Arbitrator. iii. Subject to the same rules pertaining to privileged communications and attorney work product that would apply if the proceeding was filed in the courts of the State of California, the Arbitrator shall have the authority to make all decisions regarding the relevance, materiality, and admissibility of all evidence offered at the arbitration.
iv. The Arbitrator may issue any remedy or relief, whether provisional or permanent, including but not limited to a default judgment, which the parties could have obtained under the law applicable in courts of the State of California under the same factual circumstances, and the Arbitrator shall follow and otherwise employ the standards for issuing such relief as defined by California law; provided, however, that the Arbitrator shall have no authority or jurisdiction to enter an award for consequential, special, exemplary or punitive damages. The Arbitrator may also grant such ancillary relief as is necessary to make effective the award.

Both parties may conduct discovery as if the matter were pending before a Superior Court of the State of California and the Arbitrator shall have the full power of the State of California to issue and enforce subpoenas and to award sanctions. Either party shall have the right to demand in writing that the other party provide a list of· witnesses it intends to call at the hearing, designating which witnesses will be called as expert witnesses, and a list of documents it intends to introduce at hearing. The responding party's list(s) shall be served personally or by registered or certified mail on the requesting party, with a copy to the Arbitrator, at least thirty (30) days before the hearing. v. Each party shall have the right to be represented by counsel. vi. The Arbitrator shall be paid a per diem or hourly charge as established at the time of appointment. Each party shall bear its own attorneys' fees and costs in presenting its case. All other actual costs of conducting the arbitration, including without limitation, the administrative fee and the Arbitrator's compensation, shall be shared equally.
vii. This arbitration clause shall be interpreted under the arbitration laws of the State of California and not the Federal Arbitration Act, 9 U.S.C. §1. Except as otherwise provided in this Agreement, any motion, application, complaint or proceeding 12 16. AUDITS:
arising out of or relating to this arbitration clause shall be determined in accordance with the law of the State of California.
viii. Unless otherwise provided in this Agreement or otherwise agreed in writing, the parties shall continue to perform their respective obligations under this Agreement during the pendency of arbitration proceedings. ix. Except as modified or stated to the contrary in this Section 15., the rules and procedures of the Arbitrator in effect at the time of the arbitration shall apply to the arbitration procedure.
a. Each party may at its expense conduct a financial audit of the other party in matters pertinent to this Agreement upon written request.
b. An audit shall not be conducted more frequently than annually and the right to audit shall not exceed the four fiscal years preceding and including the notice of audit. Each party will maintain true and complete records and will retain such records for at least four years. Any claim arising from the audit will not be barred by the statute of limitations so long as the claim is filed within one (1) year of commencing the audit. c. The agency being audited shall provide such assistance as may be reasonably required in the course. of such audit. Any such audit shall be conducted in accordance with generally accepted auditing principles for audits of state and local governmental units.

The accounting shall be maintained substantially in accordance with the governmental Generally Accepted Accounting Principles (GAAP) for State and Local Governments. d. In the event the audit determines that the City has either been overcharged or undercharged for the services provided by the District under this Agreement, the City shall either be credited against future charges for the amount it overpaid or pay the District the additional amount owed.

17. FURTHER ASSURANCES: In addition to the acts specifically required in this Agreement, the parties hereto agree to perform or cause to be performed any and all such further acts and to provide· such further assurances as may be reasonably necessary to effect the transactions contemplated hereby, including the execution, delivery and, if applicable, filing of such additional documents and instruments as may be reasonably requested by such other party and/or be reasonably necessary to carry out the intent of this Agreement.

18. GOVERNING LAW: California law shall govern the interpretation and implementation of this Agreement, and the rights of the parties hereunder shall be determined in accordance with California law.
13 19. NOTICES: Any provision of this Agreement requiring notice shall be deemed to have been satisfied if notice is provided in writing by first class United-States Mail, addressed as follows:

A. For the District:

General Manager
Contra Costa Water District
P.O. Box H20
Concord, California 94524-2099
B. For the City:

City Manager
City of Antioch
P.O. Box 5007
Antioch, CA 94531-5007

20. MISCELLANEOUS PROVISIONS:
a. Joint Preparation. Preparation of this Agreement has been a joint effort of the parties and this Agreement shall not be construed more severely against one of the parties than against the other.
b. Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties' respective successors and assigns.
c. Captions. The captions contained in this Agreement are for convenience and reference only and in no way define, describe, extend or limit the scope or intent of this Agreement or the intent of any provision contained herein.
d. Invalidity. The invalidity of one or more phrases, sentences, clauses, sections or paragraphs contained in this Agreement shall not affect the validity of the remaining portions of this Agreement so long as the material purposes of this Agreement can be determined and remain effectuated.
e. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.
14 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed on their respective behalf, by their respective representatives duly authorized, all as of the day and year first above written.

CITY OF ANTIOCH CONTRA COSTA WATER DISTRICT
ATTEST:

Ver~~istrict Secretary
Approved as to Form:
21:~~
District Legal Counsel
15 EXHIBIT A
Costs for Treated Water Service to City of Antioch
The principle is for the City to reimburse the District for its cost of service for untreated water and treatment of water (O&M and fixed costs) at the Randall-Bold Water Treatment Plant (RBWTP) with delivery of treated water using the Multi-Purpos_e Pipeline (MPP), plus a proportional share of the capital costs of the RBWTP, as more fully set forth in the table below. This example assumes the City's capacity right is 8 MGD, the rates are those in effect as of July 1, 2022, and the budgetary estimates for FY23, unless otherwise noted.

COMPONENT Example cost BASIS FOR ACTUAL CHARGES
($/AF or$)
Untreated Water Rate ..

Usage Charge $795.07/AF 5.20.010 C, $2.44/1000 gallons.

Demand Charge $159.33/AF 5.20.010 D, $3.57 per thousand gallons shall be applied based on the maximum month usage in each of the preceding three fiscal years, averaged. Example assumes maximum monthly average demand of 5 MGD with average annual deliveries of 3 MGD.

Service Charge $0.03/AF 5.20.010 B, $8.20/month with average annual deliveries of 3 MGD.

SUB-TOTAL (UW) $954.43/AF
Treated Water Rate ..

RBWTP Fixed $211.71/AF Ratio of Antiocb's then-current capacity right to the District 1 s 35
MGD, multiplied by the District's share of the fixed costs ($3,112,583) per the JPA With DWD. This is adjusted annually. Example assumes Antioch's capacity right is currently 8 MGD with average deliveries of 3 MGD.

RBWTP Variable $75.84/AF Based on the District's total variable costs ($2,395,837) for treatment divided by total deliveries for the District and partners {31,591 AF).

This is adjusted annually.

MPP Power $62.00/AF Based on actual unit energy costs for the MPP. FY22 estimate is $62/AF.

MPP Maintenance $8.75/AF Based on actual MPP maintenance service costs {$276,288) divided services by actual deliveries (31,591 AF). FY22 estimate is $8.75/AF.

MPP labor, taxes $6.40/AF Based on actual labor costs {$202,039) divided by actual deliveries and benefits (31,591 AF). FY22 estimate is $6.40/AF.

SUB-TOTAL {TW) $364.70/AF
TOTAL RATE $1,319.13/ AF
Treated.Water Capital
RBWTP Capital $92,579 Ratio of Antioch's then-current capacity right to RBWTP's 50 MGD, (FY22 multiplied by the total capital costs. This is adjusted annually. estimate) Example is for FY22 and assumes total capital costs of $578,619 with the City's proportional share of $92,579 assuming a capacity right of 8 MGD {8 MGD/50 MGD * $578,619)
16 City of Antioch
2025 Urban Water Management Plan
August 2026

Appendix F

Energy Use Tables

Water Delivery Product
drop down list
(If delivering more than one type of product recommend
using Table O-1C)
Retail Potable
Deliveries
Start Date of Reporting Period 1/1/2025
End Date of Reporting Period 12/31/2025
Is upstream embedded energy in the values reported? No
Units of Measure for Water MG Total Utility
See DWR NOTES Hydropower Net Utility
5,110 5,110 8,023,792 8,023,792 1,570 - 1,570 Quantity of Self-Generated Renewable Energy
0 kWh
Data Quality (Estimate, Metered Data, Combination of Estimates and Metered Data) Metered Data
Data Quality Narrative:

Narrative:

Optional Submittal Table O-1B: Recommended Energy Reporting - SINGLE DELIVERY PRODUCT - TOTAL UTILITY APPROACH Only for Water Delivery Products Under the Urban Water Supplier's Operational Control
Sum of All Water Management
Processes Non-Consequential Hydropower
Volume of Water Entering Process
Energy Consumed (kWh)
Energy Intensity (kWh/vol. converted to MG)
DWR NOTES:

Total Utility:The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4-1: 2025 Actual Total Uses for Potable and Non-Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from your volume in this table.

All power usage data has been provided by the Pacific Gas and Electric Company (PG&E) for the surface water treatment plants.

Energy is consumed during water pumping and treatment.

NOTES: No additional notes.

Start Date of Reporting Period 1/1/2025
End Date of Reporting Period 12/31/2025
Is upstream embedded energy in the values reported? No Units of Measure for Water MG Collection /
Conveyance Treatment Discharge /
Distribution Total
2,359 2,359 0 4,718
792,145 2,490,572 0 3,282,717
336 1,056 0 696
0 0 0 0
0 0 0 0
0 0 0 0
Quantity of Self-Generated Renewable Energy related to recycled water and wastewater operations
0 kWh
Data Quality (drop down)
Metered Data
Data Quality Narrative:

Narrative:

NOTES: No additional notes.

Optional Submittal Table O-2: Recommended Energy Reporting - WASTEWATER AND RECYCLED WATER Only for Water Delivery Products Under the Urban Water
Supplier's Operational Control
Water Management Process
Volume of Wastewater Entering Process (volume units selected above) Wastewater Energy Consumed (kWh)
Wastewater Energy Intensity (kWh/volume converted to MG) Volume of Recycled Water Entering Process (volume units selected above) Recycled Water Energy Consumed (kWh)
Recycled Water Energy Intensity (kWh/volume converted to MG) All power usage data has been provided by the Pacific Gas and Electric Company (PG&E) for the wastewater treatment plants.

Energy is consumed at force mains, the lift station, and the WWTP.

City of Antioch
2025 Urban Water Management Plan
August 2026

Appendix G

Annual Water Quality Reports
(20 20-2024)

TO OUR CUSTOMERS:

We are pleased to present the Annual Water Quality Report that shows the high quality of your drinking water. As the water providers to more than 500,000 people, you can count on us to provide a reliable product that exceeds all drinking water standards set by the state and federal governments keeping our community healthy and thriving. We wisely put your water dollars to work investing in the systems and infrastructure that deliver a reliable supply of high-quality water at the lowest cost possible.

This report includes water quality data collected throughout 2020 and answers questions you might have about your tap water. For detailed test results, see pages 7-11.

You can be confident your tap water is of a high quality that is always there for you. Frequent testing for water quality and regular improvements in the treatment process keeps your drinking water among the best in the country.

We hope you find this report useful in illustrating the high quality of your water service. If you have questions about the tap water in your community, please use the list on the left to call your water provider.

CONTRA COSTA WATER DISTRICT
Erin Gomez | 925-688-8091

CITY OF ANTICOH
Laura Villasana | 925-779-7024

CITY OF MARTINEZ
Hiren Patel | 925-372-3588

CITY OF PITTSBURG
Ana Corti | 925-252-6916

DIABLO WATER DISTRICT
Nacho Mendoza | 925-625-2112

GOLDEN STATE WATER COMPANY
(BAY POINT)
800-999-4033

CITY OF BRENTWOOD
James Wolfe | 925-516-6000
YOUR

DRINKING
WATER
IN 2020

ANNUAL WATER

QUALITY REPORT
2020 ANNUAL WATER QUALITY REPORT2

SAFETY STANDARDS ENSURE QUALITY
The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.

CONTAMINANTS THAT MAY BE PRESENT

IN SOURCE WATER
Microbial contaminants include viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

Inorganic contaminants include salts and metals that can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming.

Organic chemical contaminants include synthetic and volatile organic chemicals that are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, agricultural application and septic systems.

Pesticides and herbicides may come from a variety of sources, such as agriculture, urban stormwater runoff and residential uses.

Radioactive contaminants can be naturally occurring or be the result of oil and gas production and mining activities.

In order to ensure that tap water is safe to drink, the U.S.

Environmental Protection Agency (US EPA) and the State Water Resources Control Board (State Board) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. State Board regulations also establish limits for contaminants in bottled water that provide the same protection for public health.

Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some
contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the US EPA’s Safe Drinking Water Hotline (1-800-426-4791).

None of the public water systems listed in this report produce or distribute bottled water. The State Division of Drinking Water mandates that the statements about bottled water be included in this report.

IMPORTANT NOTICE
Some people may be more
vulnerable to contaminants
in drinking water than the
general population. Immuno-
compromised persons such
as persons with cancer
undergoing chemotherapy,
persons who have undergone
organ transplants, people
with HIV/AIDS or other
immune system disorders,
some elderly, and infants
can be particularly at risk
from infections. These
people should seek advice
about drinking water from
their health care providers.

USEPA/Centers for Disease
Control (CDC) guidelines
on appropriate means to
lessen the risk of infection by
Cryptosporidium and other
microbial contaminants
are available from the Safe
Drinking Water Hotline at
1-800-426-4791.

Your drinking water is continually sampled and analyzed. We perform tens of thousands of tests throughout the year to ensure your water is clean and safe to use. 2020 ANNUAL WATER QUALITY REPORT 3

WATER QUALITY NOTIFICATIONS

LEAD IN DRINKING WATER
No water provider included in this report detected lead above the regulatory action level in their water supply. If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and plumbing in buildings and homes. Your drinking water supplier is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to two minutes before using water for drinking or cooking. If you do so, you may wish to collect the flushed water and reuse it for another beneficial purpose, such as watering plants. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline at 1-800-426-4791 or at epa.gov/lead.

LEAD MONITORING IN SCHOOLS
In early 2017, the State Board issued amendments to domestic water supply permits of community water systems so that kindergarten through 12th grade (K–12) schools can request assistance from their water provider to conduct water sampling for lead and receive technical assistance if an elevated lead sample is found. To further safeguard water quality in California’s K–12 public schools, California Assembly Bill 746, effective January 1, 2018, requires community water systems to test lead levels, by July 1, 2019, in drinking water at all California public K–12 schools, preschools, and child care facilities located on public school property constructed before January 1, 2010.

To find out more about the Lead Sampling of Drinking Water in Schools initiative, visit waterboards.ca.gov/drinking_water/ certlic/drinkingwater/leadsamplinginschools.shtml.

FLUORIDE
To prevent tooth decay, fluoride is added to your drinking water.

This is a long-standing practice that has improved public health over many years. To read about fluoridation, visit waterboards.ca.gov/drinking_water/certlic/drinkingwater/ Fluoridation.shtml.

CRYPTOSPORIDIUM
Cryptosporidium is a microbial pathogen
found in surface water throughout the U.S.

Although filtration removes Cryptosporidium, the
most commonly-used filtration methods cannot
guarantee 100 percent removal. Our monitoring
indicates the presence of these organisms in our source water and/or finished water. Current test methods do not allow us to determine if the organisms are dead or if they are capable of causing disease. Ingestion of Cryptosporidium may cause cryptosporidiosis, an abdominal infection. Symptoms of infection include nausea, diarrhea, and abdominal cramps.

Most healthy individuals can overcome the disease within a few weeks. However, immunocompromised people, infants and
small children, and the elderly are at greater risk of developing life-threatening illness. We encourage immuno-compromised individuals to consult their doctor regarding appropriate precautions to take to avoid infection. Cryptosporidium must be ingested to cause disease, and it may be spread through means other than drinking water.

Sedimentation
basins in our water
treatment plants skim
clean water from the top
of the basin and allow heavy
organics to settle out at
the bottom.

The use of ozone disinfection results in drinking water that is very safe, with little taste and odor. Ozone effectively destroys potentially harmful microorganisms and, by breaking up the organic material often found in water, vastly improves the taste and odor of drinking water. In addition, ozone disinfection reduces the formation of many disinfection byproducts, such as trihalomethanes, a class of suspected cancer-causing compounds associated with chlorine disinfection.
2020 ANNUAL WATER QUALITY REPORT4

THE SOURCE OF YOUR WATER
Nearly every drop of water delivered by Contra Costa Water District originates in the Sacramento-San Joaquin River Delta.

Though Delta water quality fluctuates throughout the year, investments made by your water provider ensures the water delivered to your tap is of a consistent high-quality. Contra Costa Water District diverts water from four locations in the Delta and adjusts its operations to divert where water quality is best.

CONTRA COSTA WATER DISTRICT
CCWD provides treated drinking water to homes and businesses in Clayton, Clyde, Concord, Pacheco, Port Costa, and parts of Martinez, Pleasant Hill and Walnut Creek. Water is pumped from the Delta, treated and then delivered to customers through a network of distribution pipes.

CCWD completes watershed sanitary surveys every five years and the last one was completed in 2020. The surveys concluded that potential contamination is regularly mitigated by the natural flushing of the Delta, controls at contamination sources and existing water treatment practices.

In June 2002 and May 2003, source water assessments were conducted at the Old River, Rock Slough and Mallard Slough intakes, the Los Vaqueros, Contra Loma, Mallard and Martinez reservoirs, and the Contra Costa Canal at Clyde. A source water assessment was conducted for the Middle River Intake in 2012.

The assessments were based on a review of data collected from 1996 through 2001, as well as a review of the activities and facilities located at or near each source. In summary:
• Intakes were found to be most vulnerable to the effects of saltwater intrusion, agricultural drainage, recreational boating and regulated point discharges.
• Reservoirs were found to be most vulnerable to the effects of associated recreation, roads and parking lots, and watershed runoff. • Contra Costa Canal was found to be most vulnerable to gas stations, chemical/petroleum processing/storage, septic systems, historic landfills and military institutions.

BAY POINT
The Golden State Water Company (GSWC) purchases treated water from CCWD and delivers it to customers through its distribution pipes. Water quality information for GSWC is not included in this report. View its water quality report at gswater.com/baypointccr.

BRENTWOOD
CCWD operates the CCWD/City of Brentwood’s water treatment plant to treat water for the City. Water quality information for Brentwood is not included in this report. View its water quality report at brentwoodca.gov/gov/pw/water/reports.asp.

THE DEL TA
HONKER
BA Y
CGSWCG

PITT SBUR G

A NTI OC H

DIABL O

WA TER DI STRI CT

BRENT WOO D

MA RTINE Z
CC WD

T REA TED WATER

SERVI CE A REA

CLIFT ON
COURT

FOREB AY
LO S

VA QUEROS

RESERVOIR

ANTIOCHANTIOCH

RESERVOIRRESERVOIR

ANTIOCH

R ESERVOIR

CONTR ACONTR A

LOMALOMA

RESERVOIRRESERVOIR

CONTR A
LOMA

R ESERVOIR

MALLARDMALLARD

R ESERVOIRRESERVOIR

SUISUN BA Y

SACRAMENT O R IVER

SAN J O AQUIN RIVER

MALLARD

R ESERVOIR
MIDDLE
RIVER
INTAKE

OLD RIVER
INTAKE
ROCK
SLOUGH
INTAKE

MALLARD

SLOUGH INTAKE
Ralph D. BollmanRalph D. Bollman
WTPWTP
Ralph D. Bollman
WTP
Concord
Port
Costa
Clyde
Pleasant
Hill
Clayton
Port
Chicago
Avon
Oakley
Discovery
Bay
Pacheco
Walnut Creek
Randall-Bold
WTP

CCWD-EBMUDCCWD-EBMUD
Intertie Intertie

CCWD-EBMUD
Intertie
CCWD
Transfer
Facility
CCWD/
City of Brentwood
WTP
District
Center

MART INEZ

YOUR WATER IS SAFE AND RELIABLE

INVESTMENTS IN

INFRASTRUCTURE
We’ve recently replaced the
concrete liner along several
sections of the 48-mile Contra Costa
Canal. The Contra Costa Canal is the
backbone of our water system, delivering
water to treatment plants, businesses, and
agriculture.

In addition to ensuring safe, clean water at your
tap, it’s our responsibility to maintain and upgrade the facilities that move the water throughout our communities.

Every year, we invest in infrastructure upgrades like pipeline replacement, Contra Costa Canal rehabilitation, storage tank improvements, and much more to avoid costly and disruptive breaks in our system.

To learn more about planned capital improvements, visit ccwater.com/ ArchiveCenter/ViewFile/Item/323

THE FACTS ABOUT PFAS
PFAS—short for per- and polyfluoroalkyl substances—are a group of man-made chemicals that includes perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS) and GenX chemicals. Since the 1940s, PFAS have been manufactured and used in a variety of industries around the globe, including in the United States. The chemicals have been used in consumer products such as carpets, clothing, fabrics for furniture, paper packaging for food, and other materials (e.g., cookware) designed to be waterproof, stain-resistant, or non-stick. They also have been used in fire-retarding foam at airfields, military bases, and various industrial processes. PFOA and PFOS have been the most extensively produced and studied of these chemicals. Both are very persistent in the environment and in the human body. Exposure to certain PFAS can lead to adverse human health effects.

Unfortunately, some of these substances don’t break down over time. That means they build up in the environment and in our bodies.

Testing has confirmed that CCWD’s water supply is safe to drink and PFOA/PFOS were not detected during monitoring.

To learn more about PFAS and drinking water, visit ccwater.com/422.

SAFE FROM COVID-19
Existing filtration and disinfection processes in our water treatment systems remove and kill viruses including the coronavirus. While water quality was unaffected by this new virus in our community, operations were adjusted to ensure the skilled workforce that treats, operates, and maintains remained healthy and able to keep your public water system functioning.

Coronavirus does not pose a threat to the water you depend on for drinking, bathing, washing, and so much more.

Additional information about coronavirus and drinking water is available at epa.gov/coronavirus/coronavirus-and-drinking-water-and-wastewater. 2020 ANNUAL WATER QUALITY REPORT6

DEFINITIONS & ABBREVIATIONS
Action Level (AL) – The concentration of
a contaminant which, if exceeded, triggers
treatment or other requirements which a water
system must follow
Maximum Contaminant Level (MCL) – The
highest level of a contaminant that is allowed
in drinking water. Primary MCLs are set as close
to the PHGs (or MCLGs) as is economically or
technologically feasible
Maximum Contaminant Level Goal (MCLG) –
The level of a contaminant in drinking water
below which there is no known or expected risk to
health. MCLGs are set by the U.S. Environmental
Protection Agency
Maximum Residual Disinfectant Level (MRDL) –
The highest level of a disinfectant allowed in
drinking water. There is convincing evidence that
the addition of a disinfectant is necessary for
control of microbial contaminants
Maximum Residual Disinfectant Level
Goal (MRDLG) – The level of a drinking water
disinfectant below which there is no known or
expected risk to health. MRDLGs do not reflect
the benefits of the use of disinfectants to control
microbial contaminants
mg/L – Milligrams per liter
n/a – Not analyzed or not applicable (when used in
average column, only one data point is available)
ND – Not detected at or above the reporting level
ng/L – Nanograms per liter
NTU – Nephelometric turbidity units
Primary Drinking Water Standards – MCLs
and MRDLs for contaminants that affect health
along with their monitoring and reporting
requirements, and water treatment requirements
pCi/L – Picocuries per liter (a measure of
radioactivity)
Public Health Goal (PHG) – The level of a
contaminant in drinking water below which there
is no known or expected risk to health. PHGs are
set by the California Environmental Protection
Agency Office of Health and Hazard Assessment
RAA – Running Annual Average
Secondary Drinking Water Standards –
Secondary MCLs are set for contaminants that
affect the odor, taste or appearance of water
Treatment Technique (TT) – A required process
intended to reduce the level of a contaminant in
drinking water
µg/L – Micrograms per liter
µmhos/cm– micromhos per centimeter
(a measure of conductivity)

Constituents may vary from provider to provider depending on water source and treatment techniques. Please see ccwater.com for a list of constituents tested but not detected.

State or Federal Goal (PHG, MCLG or MRDLG) – The level of contaminant in drinking water below which there is no known or expected risk to health
Highest Amount Allowed (AL, MCL or MRDL) – The highest level of a contaminant that is allowed in drinking water
Average – The average level of a detected contaminant in drinking water Major Source in Drinking Water – The most likely way a contaminant enters drinking water
WATER

PROVIDER
State
or
Federal
Goal
Highest
Amount
Allowed
Range
Detected Average Major Source in Drinking WaterInorganic

0.8Fluoride (mg/L) 1 2
Erosion of natural deposits; water
additive that promotes strong
teeth; discharge from fertilizer and
aluminum factories
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health 1 2 3
4 1
2 3
4 UNITS EQUIVALENCE
mg/L (milligrams per liter)
ppm (parts per million)
µg/L (micrograms per liter)
ppb (parts per billion)
1 second in 11.5 days
1 second in nearly 32 years

0.5–1.0
2020 ANNUAL WATER QUALITY REPORT 7

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2020

CCWD RANDALL-BOLD
WTP*
CCWD-

BRENTWOOD WTP
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
Detected
Range
DetectedAverage Average Average Major Source in Drinking WaterInorganic State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
# of Sites
T ested/#
Exceeding AL
# of Sites
T ested/#
Exceeding AL
90%
Percentile
90%
Percentile
90%
Percentile Major Source in Drinking WaterLead and Copper State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Maximum
Value
Maximum
Value
Average or
[Monthly % of
Samples that Meets
Requirement]
Average or
[Monthly % of
Samples that Meets
Requirement]
Average or
[Monthly % of
Samples that Meets
Requirement]
Major Source in Drinking WaterMicrobiological
Standards
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
Detected
Range
Detected
Highest
Quarterly
RAA
Highest
Quarterly
RAA
Highest
Quarterly
RAA
Major Source in Drinking WaterDisinfectant/Disin-
fection Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
Detected
Range
DetectedAverage Average Average Major Source in Drinking Water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
Detected
Range
DetectedAverage Average Average
State or
Federal Goal
Notification
Level
Range
Detected
Range
Detected
Range
DetectedAverage Average Average
ND n/a n/aLead (µg/L) 0.2 15 55/0 n/a n/a Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits

0.3% n/a n/aT otal Coliform
(state T otal Coliform Rule) n/a 5% of mo.
samples 0%–1.1% n/a n/a Naturally present in the environment [100%] [100%] [100%]T urbidity (NTU)
(treatment plant) n/a 95% ≤ 0.3 0.22 0.10 0.14 Soil runoff

0.14 n/a n/aCopper (mg/L) 0.3 1.3 55/0 n/a n/a Internal corrosion of household water plumbing systems; erosion of natural deposits; leaching from wood preservatives

0.7 0.7 NDFluoride (mg/L) 1 2 0.6–0.8 0.6–0.7 ND–0.1 Erosion of natural deposits; water additive that promotes strong teeth

0.1 0.4 0.1Nitrate as N (mg/L) 10 10 ND–0.5 ND–0.7 ND–0.4 Runoff and leaching from fertilizer use 58 58 68Chloride (mg/L) n/a 250 33–84 32–83 31–149 Runoff/leaching from natural deposits; seawater influence 69 65 66Alkalinity (mg/L) n/a n/a 54–82 51–90 55–71

3.6 12 3.2Manganese (µg/L) n/a 500 1.2–6.8 0.9–45 1.8–4.1

6.6 n/a n/aHAA5 (µg/L) n/a n/a 1.6–14 n/a n/a

7.1 n/a n/aHAA Br (µg/L) n/a n/a 1.4–15 n/a n/a
11 n/a n/aHAA9 (µg/L) n/a n/a 2.5–25 n/a n/a
3,475 3000 3,525T otal Organic Carbon
(TOC) (µg/L) n/a n/a 2,800–
4,200
2,000–
4,300
2,100–
5400
189 191 176Bromide (µg/L) n/a n/a 110–236 88-275 89-262 n/a n/a n/aAmmonia (mg/L) n/a n/a 0.6 0.5 0.5

0.1 0.1 0.1Bromide (mg/L) n/a n/a ND–0.2 ND–0.2 ND–0.3
16 17 16Calcium (mg/L) n/a n/a 12–22 12–25 13–19
85 89 88Hardness (mg/L) n/a n/a 65–110 64–120 64–110
11 11 12Magnesium (mg/L) n/a n/a 8.2–13 8.2–14 8.5–17

8.4 8.2 8.4pH n/a n/a 8.1–8.8 7.8–8.7 8.0–9.1

2.5 2.5 2.6Potassium (mg/L) n/a n/a 1.9–3.2 1.8–3.3 2.1–4.2 52 55 58Sodium (mg/L) n/a n/a 34–66 39–74 35–110
437 466 473Specific conductivity
(µmhos/cm) n/a 900 312–553 336–577 309–750 Substances that form ions when in water; seawater influence 49 62 54Sulfate (mg/L) n/a 250 36–53 49–85 36–71 Naturally-occurring organic materials 231 248 252T otal dissolved solids
(mg/L) n/a 500 164–292 181–312 165–394 Runoff/leaching from natural deposits

0.20 n/a n/aT urbidity (NTU)
(distribution system) n/a 5 0.08–0.51 n/a n/a Soil runoff

1.7 n/a n/aChloramines as CI2 (mg/L) 4 ND–3.6 n/a n/a Disinfectant/Disinfection Byproducts ND n/a n/aBromate (µg/L) 0.1 10 ND–9.6 n/a n/a Disinfectant/Disinfection Byproducts 12 n/a n/aHaloacetic acids (µg/L) n/a 60 1.7–18 n/a n/a Byproduct of drinking water disinfection 20 n/a n/aT otal trihalomethanes
(µg/L) n/a 80 7.4–28 n/a n/a Byproduct of drinking water disinfection Date of sampling June 2019 n/a n/a
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health * Randall-Bold Water Treatment Plant is a regular source of water for CCWD, Diablo Water District and the Golden State Water Company in Bay Point. It is also an as-needed source of water for Antioch and Brentwood and an emergency source for Pittsburg.

PUBLIC MEETINGS
First and Third Wednesday
6:30 p.m.
1331 Concord Avenue
Concord, CA 94520
925-688-8000
ccwater.com
In-person attendance subject
to COVID-19 restrictions. For
teleconference information, visit
ccwater.com.

If you have any questions about Contra
Costa Water District tap water, please
call 925-688-8091.

SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water GENERAL WATER QUALITY PARAMETERS Non-regulated parameters of general interest to consumers UCMR4 ASSESSMENT MONITORING 2018–2020
2020 ANNUAL WATER QUALITY REPORT8

CITY OF ANTIOCH

SOURCE OF WATER
The City of Antioch
purchases untreated water
from CCWD, treats it in
a City-owned treatment
plant and delivers it to
customers through the
City’s distribution pipes.

The City is also able to
pump directly from the San
Joaquin River or purchase
treated water from CCWD.

The City completes
watershed sanitary surveys
every five years. The last
survey, completed in 2018,
concluded that potential
contamination is regularly
mitigated by the natural
flushing of the Delta,
controls at contamination
sources and existing water
treatment practices.

In April 2003, Antioch
conducted a source water
assessment. In summary:
• Antioch Municipal
Reservoir was found
to be most vulnerable
to sewer collection
systems; this activity
is not associated with
contaminants in the
water supply.
• San Joaquin River
was found to be most
vulnerable to the effects
of saltwater intrusion,
chemical/petroleum
processing or storage,
and regulated point
discharges.

Water from the San
Joaquin River is not
always acceptable due to
saltwater intrusion. When
chloride levels in the river
exceed 250 milligrams
per liter, the City stops
pumping until chloride
levels decrease.

PUBLIC MEETINGS
Second and Fourth Tuesdays
7:00 p.m.
200 H Street
Antioch, CA 94509
925-779-7009
ci.antioch.ca.us
If you have any questions about
the City of Antioch tap water,
please call 925-779-7024.

TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2020

CITY OF

ANTIOCH
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking WaterInorganic

0.8Fluoride (mg/L) 1 4 0.6–1.0 Erosion of natural deposits; water additive that promotes strong teeth
State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking WaterLead and Copper < 5.0Lead (µg/L) 0.2 0 50/0
Internal corrosion of household water plumbing
systems; discharges from industrial manufacturers;
erosion of natural deposits
Date of sampling August 2018

0.051Copper (mg/L) 0.3 1.3 50/0
Internal corrosion of household water plumbing
systems; erosion of natural deposits; leaching from
wood preservatives
State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Monthly %
of Samples
that Meets
Requirement
Major Source in Drinking WaterMicrobiological Standards 99%T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 0.19 Soil runoff State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA Major Source in Drinking WaterDisinfectant/Disinfection Byproducts

2.4Chloramines as CI2 (mg/L) 4 0.6–3.5 Drinking water disinfectant added for treatment

8.0Haloacetic acids (µg/L) n/a 60 2.7–12 Byproduct of drinking water disinfection 55T otal trihalomethanes (µg/L) n/a 80 39–62 Byproduct of drinking water disinfection State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
State or
Federal Goal
Notification
Level
Range
Detected Average
70Chloride (mg/L) n/a n/a 31–111 Runoff/leaching from natural deposits; seawater influence
490Specific conductivity
(µmhos/cm) n/a 900 336–630 Substances that form ions when in water; seawater influence
294T otal dissolved solids (mg/L) n/a 500 142–382 Runoff/leaching from natural deposits 2Odor-threshold (units) n/a 3 1–2 Naturally-occurring organic materials 53Sulfate (mg/L) n/a 250 48–58 Naturally-occurring organic materials

0.06T urbidity (NTU)
(distribution system) n/a 5 0.03–0.78 Soil runoff
80Alkalinity (mg/L) n/a n/a 61–109
18Calcium (mg/L) n/a n/a 12–34
94Hardness (mg/L) n/a n/a 71–128
12Magnesium (mg/L) n/a n/a 11–12

8.6pH n/a n/a 7.9–9.4
59Sodium (mg/L) n/a n/a 52–65

2.5Potassium (mg/L) n/a n/a 2–3

3.6Manganese (µg/L) n/a 500 1.0–7.8

4.8HAA5 (µg/L) n/a n/a 1.7–12

5.2HAA Br (µg/L) n/a n/a 0.7–12

8.9HAA9 (µg/L) n/a n/a 2.4–21
3,200T otal Organic Carbon (TOC)
(µg/L) n/a n/a 2,500–
3,900
238Bromide (µg/L) n/a n/a 130–360
SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water

GENERAL WATER QUALITY PARAMETERS
UCMR4 ASSESSMENT MONITORING 2018–2020
2020 ANNUAL WATER QUALITY REPORT 9

CITY OF MARTINEZ

SOURCE OF WATER
The City of Martinez
purchases untreated
water from CCWD,
treats it in a City-owned
treatment plant and
delivers it through the
City’s distribution pipes
to customers who are
not served treated water
directly from CCWD.

PUBLIC MEETINGS
First and Third Wednesdays
7:00 p.m.
525 Henrietta Street
Martinez, CA 94553
925-372-2512
cityofmartinez.org
If you have any questions about
the City of Martinez tap water,
please call 925-372-3588.

TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2020

CITY OF

MARTINEZ
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking WaterInorganic

0.7Fluoride (mg/L) 1 2 0.6–0.8 Erosion of natural deposits; water additive that promotes strong teeth

0.3Nitrate as N (mg/L) 10 10 ND–0.5 Runoff and leaching from fertilizer use State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking WaterLead and Copper NDLead (µg/L) 0.2 15 61/0
Internal corrosion of household water plumbing
systems; discharges from industrial manufacturers;
erosion of natural deposits
Date of sampling June 2018

0.07Copper (mg/L) 0.3 1.3 61/0
Internal corrosion of household water plumbing
systems; erosion of natural deposits; leaching from
wood preservatives
State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Average or
[Monthly % of
Samples that Meets
Requirement]
Major Source in Drinking WaterMicrobiological Standards [100%]T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 0.11 Soil runoff State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA Major Source in Drinking WaterDisinfectant/Disinfection Byproducts

1.7Chloramines as CI2 (mg/L) 4 ND–3.5 Drinking water disinfectant added for treatment

3.0Haloacetic acids (µg/L) n/a 60 ND–3.5 Byproduct of drinking water disinfection 16T otal trihalomethanes (µg/L) n/a 80 8.9–23 Byproduct of drinking water disinfection State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
State or
Federal Goal
Notification
Level
Range
Detected Average
57Chloride (mg/L) n/a 250 38–75 Runoff/leaching from natural deposits; seawater influence
425Specific conductivity
(µmhos/cm) n/a 900 360–490 Substances that form ions when in water; seawater influence
240T otal dissolved solids (mg/L) n/a 500 190–290 Runoff/leaching from natural deposits 1Odor-threshold (units) n/a 3 ND–1 Naturally-occurring organic materials 50Sulfate (mg/L) n/a 250 48–51 Naturally-occurring organic materials

0.3T urbidity (NTU)
(distribution system) n/a 5 0.2–0.4 Soil runoff
64Alkalinity (mg/L) n/a n/a 63–64

0.2Bromide (mg/L) n/a n/a 0.1–0.3
15Calcium (mg/L) n/a n/a 14–16
79Hardness (mg/L) n/a n/a 72–85
10Magnesium (mg/L) n/a n/a 9–11

9.0pH n/a n/a 8.4–9.3
51Sodium (mg/L) n/a n/a 43–58

2.5Potassium (mg/L) n/a n/a 1.9–3.0

3.1Manganese (µg/L) n/a 500 0.4–5.0

2.4HAA5 (µg/L) n/a n/a 0.3–4.4

2.7HAA Br (µg/L) n/a n/a 0.6–5.1

3.8HAA9 (µg/L) n/a n/a 1.0–7.1
3,667T otal Organic Carbon (TOC)
(µg/L) n/a n/a 2,800–
4,400
227Bromide (µg/L) n/a n/a 110–310
SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water

GENERAL WATER QUALITY PARAMETERS
UCMR4 ASSESSMENT MONITORING 2018–2020
2020 ANNUAL WATER QUALITY REPORT10

SOURCE OF WATER
The City of Pittsburg
purchases untreated water
from CCWD, treats it in
a City-owned treatment
plant and delivers it to
customers through the
City’s distribution pipes.

In addition to the water it
buys from CCWD, the City
is able to pump water from
two wells.

A source water assessment
was conducted for the
Dover Well in September
2015, and for Bodega Well
in July 2009. In summary:
• Bodega well was found
to be most vulnerable
to residential sewer
collection systems,
abandoned military
installation (Camp
Stoneman) and illegal
activities (drug labs).
• Dover well was
considered most
vulnerable to sewer
collection systems,
transportation corridors,
and storm drain
discharge points. No
contaminants associated
with the identified
potentially contaminating
activities (PCA) have
been detected in water
samples from Dover well.

CITY OF PITTSBURG

PUBLIC MEETINGS
First and Third Mondays
7:00 p.m.
65 Civic Avenue
Pittsburg, CA 94565
925-252-4850
ci.pittsburg.ca.us
If you have any questions about
the City of Pittsburg tap water,
please call 925-252-6916.

TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2020

CITY OF

PITTSBURG
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking WaterInorganic

0.7Fluoride (mg/L) 1 2 0.4–0.8 Erosion of natural deposits; water additive that promotes strong teeth

0.05Aluminum (mg/L) 0.6 1 ND–0.1 Erosion of natural deposits; residue from some surface water treatment processes
n/aNitrate as N (mg/L) 10 10 0.4 Runoff and leaching from fertilizer use

2.1Arsenic (µg/L) 0.004 10 1.6–2.6 Erosion of natural deposits; runoff from orchards; glass and electronics production wastes
State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking WaterLead and Copper NDLead (µg/L) 0.2 15 54/0
Internal corrosion of household water plumbing
systems; discharges from industrial manufacturers;
erosion of natural deposits
Date of sampling August 2018
NDCopper (mg/L) 0.3 1.3 54/0
Internal corrosion of household water plumbing
systems; erosion of natural deposits; leaching from
wood preservatives
State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Monthly %
of Samples
that Meets
Requirement
Major Source in Drinking WaterMicrobiological Standards 100%T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 0.16 Soil runoff State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA Major Source in Drinking WaterDisinfectant/Disinfection Byproducts

1.5Chloramines as CI2 (mg/L) 4 0.3–2.3 Drinking water disinfectant added for treatment

0.3Chlorite (mg/L) 0.05 1 0.1–0.4
10Haloacetic acids (µg/L) n/a 60 6–11 Byproduct of drinking water disinfection 36T otal trihalomethanes (µg/L) n/a 80 20–48 Byproduct of drinking water disinfection State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
State or
Federal Goal
Notification
Level
Range
Detected Average
94Chloride (mg/L) n/a 250 51–135 Runoff/leaching from natural deposits; seawater influence
49Aluminum (µg/L) n/a 200 ND–140 Erosion of natural deposits; residue from some surface water treatment processes
658Specific conductivity
(µmhos/cm) n/a 900 447–885 Substances that form ions when in water; seawater influence
377T otal dissolved solids (mg/L) n/a 500 260–507 Runoff/leaching from natural deposits

1.3Odor-threshold (units) n/a 3 1.3 Naturally-occurring organic materials 74Sulfate (mg/L) n/a 250 59–98 Naturally-occurring organic materials

0.12T urbidity (NTU)
(distribution system) n/a 5 0.06–0.25 Soil runoff
106Alkalinity (mg/L) n/a n/a 67–160
n/aAmmonia (mg/L) n/a n/a 1.2
n/aCalcium (mg/L) n/a n/a 29
157Hardness (mg/L) n/a n/a 93–196
n/aMagnesium (mg/L) n/a n/a 16

8.5pH n/a n/a 8.0–8.8
n/aSodium (mg/L) n/a n/a 56
n/aPotassium (mg/L) n/a n/a 2.8

3.9Manganese (µg/L) n/a 500 3.2–5.3

5.4HAA5 (µg/L) n/a n/a 1.7–8.6

8.4HAA Br (µg/L) n/a n/a 1.0–16
12HAA9 (µg/L) n/a n/a 2.7–20
2,975T otal Organic Carbon (TOC)
(µg/L) n/a n/a 2,100–
4,200
115Bromide (µg/L) n/a n/a 45–260
SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water

GENERAL WATER QUALITY PARAMETERS
UCMR4 ASSESSMENT MONITORING 2018–2020
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average

UNTREATED WATER TEST RESULTS
Radiochemistry

5.0Gross Beta (pCi/L) 0 50 4.0–6.0

1.3Uranium (pCi/L) 0.43 20 1.2–1.3
2020 ANNUAL WATER QUALITY REPORT 11

DIABLO WATER DISTRICT

SOURCE OF WATER
Diablo Water District
purchases untreated
water from CCWD. Water is
treated and blended with
groundwater pumped from
two wells. The treated
water is then delivered
to customers through its
distributions pipes.

A source water assessment
was conducted for the
Glen Park well in April 2005
and for Stonecreek well in
March 2011. In summary:
• Both wells were found
to be most vulnerable to
historic waste dumps/
landfills and septic
systems (high density,
>1/acre). These activities
are not associated with
contaminants in the
water supply.

PUBLIC MEETINGS
Fourth Wednesday
6:30 p.m.
87 Carol Lane
Oakley, CA 94561
925-625-3798
diablowater.org
If you have any
questions about
Diablo Water District
tap water, please call
925-625-2112.

TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2020

DIABLO WD RANDALL-BOLD
WTP
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
DetectedAverage Average Major Source in Drinking WaterInorganic

0.7 0.7Fluoride (mg/L) 1 2 0.6–0.7 0.6–0.7
Erosion of natural deposits;
water additive that promotes
strong teeth

0.5 0.4Nitrate as N (mg/L) 10 10 0.2–0.8 ND-0.7 Runoff and leaching from fertilizer use
State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
# of Sites
T ested/#
Exceeding AL
90%
Percentile
90%
Percentile Major Source in Drinking WaterLead and Copper

0.6 n/aLead (µg/L) 0.2 15 30/0 n/a
Internal corrosion of household
water plumbing systems; discharges
from industrial manufacturers;
erosion of natural deposits
Date of sampling June 2019 n/a

0.14 n/aCopper (mg/L) 0.3 1.3 30/0 n/a
Internal corrosion of household
water plumbing systems; erosion
of natural deposits; leaching
from wood preservatives
State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Maximum
Value
Monthly %
of Samples
that Meets
Requirement
Monthly %
of Samples
that Meets
Requirement
Major Source in Drinking WaterMicrobiological
Standards
n/a 100%T urbidity (NTU)
(treatment plant) n/a 95% ≤ 0.3 n/a 0.10 Soil runoff

0.1% n/aT otal Coliform
(State T otal Coliform Rule) n/a
5% of mo.
samples 0.0%–1.5% n/a Soil runoff
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
Detected
Highest
Quarterly RAA
Highest
Quarterly RAA Major Source in Drinking WaterDisinfectant/ Disinfection Byproducts

2.4 n/aChloramines as CI2
(mg/L) 4 0.1–3.6 n/a Drinking water disinfectant
added for treatment

7.0 n/aHaloacetic acids (µg/L) n/a 60 3.0–9.9 n/a Byproduct of drinking water disinfection
12 n/aT otal trihalomethanes
(µg/L) n/a 80 7.0–16 n/a Byproduct of drinking water
disinfection
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
DetectedAverage Average Major Source in Drinking Water
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
DetectedAverage Average
State or
Federal Goal
Notification
Level
Range
Detected
Range
DetectedAverage Average
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Range
DetectedAverage Average
67 58Chloride (mg/L) n/a 250 45–100 32-83 Runoff/leaching from natural deposits; seawater influence
549 466Specific conductivity
(µmhos/cm) n/a 900 433–691 336–577 Substances that form ions when in water; seawater influence
296 248T otal dissolved solids
(mg/L) n/a 500 229–383 181–312 Runoff/leaching from natural deposits
28 n/aManganese (µg/L) n/a 50 ND–170 ND Leaching from natural deposits 73 62Sulfate (mg/L) n/a 250 47–95 49–85 Naturally-occurring organic materials

0.25 n/aT urbidity (NTU)
(distribution system) n/a 5 0.11–0.68 n/a Soil runoff
84 65Alkalinity (mg/L) n/a n/a 63–115 51–90
n/a n/aAmmonia (mg/L) n/a n/a 0.6 0.5

0.1 0.1Bromide (mg/L) n/a n/a ND–0.3 ND–0.2
22 17Calcium (mg/L) n/a n/a 16–31 12–25
112 89Hardness (mg/L) n/a n/a 83–149 64–120
14 11Magnesium (mg/L) n/a n/a 11–18 8.2–14

8.0 8.2pH n/a n/a 7.6–8.5 7.8–8.7
63 55Sodium (mg/L) n/a n/a 47–78 39–74

2.5 2.5Potassium (mg/L) n/a n/a 1.9–3.2 1.8–3.3
19 12Manganese (µg/L) n/a 500 2.7–62 0.9–45

2.0 n/aUranium (pCi/L) 0.43 20 1.8–2.2 n/a

5.1 n/aHAA5 (µg/L) n/a n/a 2.5–9.5 n/a

6.1 n/aHAA Br (µg/L) n/a n/a 3.1–14 n/a

8.6 n/aHAA9 (µg/L) n/a n/a 3.6–18 n/a
3,275 3,000T otal Organic Carbon
(TOC) (µg/L) n/a n/a 2,000–
4,400
2,000–
4,300
185 191Bromide (µg/L) n/a n/a 88–261 88–275
SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water

GENERAL WATER QUALITY PARAMETERS
UCMR4 ASSESSMENT MONITORING 2018–2020

UNTREATED WATER TEST RESULTS
Radiochemistry

WANT MORE
INFORMATION?
Contra Costa Water District’s website
contains valuable information about
water issues. Visit ccwater.com to begin
your research.

This report contains important information about your drinking water. Have someone translate it for you, or speak with someone who understands it.

Su informe anual de la calidad del agua en español está disponible en línea en ccwater.com/awqr_es. Este informe contiene información importante sobre su agua potable.

Mahalaga ang impormasyong ito. Mangyaring ipasalin ito.

TO OUR CUSTOMERS:

CONTRA COSTA WATER DISTRICT
Erin Gomez | 925-688-8091

CITY OF ANTICOH
Laura Villasana | 925-779-7024

CITY OF MARTINEZ
Hiren Patel | 925-372-3588

CITY OF PITTSBURG
Ana Corti | 925-252-6916

DIABLO WATER DISTRICT
Nacho Mendoza | 925-625-2112

GOLDEN STATE WATER COMPANY
(BAY POINT)
800-999-4033

CITY OF BRENTWOOD
James Wolfe | 925-516-6000
YOUR

DRINKING

WATER IN
2021

ANNUAL WATER

QUALITY REPORT

2021 ANNUAL WATER QUALITY REPORT2

CONTAMINANTS THAT MAY BE PRESENT

IN SOURCE WATER
Microbial contaminants include viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

Pesticides and herbicides may come from a variety of sources, such as agriculture, urban stormwater runoff and residential uses.

Radioactive contaminants can be naturally occurring or be the result of oil and gas production and mining activities.

Per- and polyfluoroalkyl substances (PFAS) are a group of man- made chemicals widely used in consumer products. To learn more about PFAS and drinking water, visit ccwater.com/422
In order to ensure that tap water is safe to drink, the U.S.

US EPA/Centers for Disease
Control (CDC) guidelines
on appropriate means to
lessen the risk of infection by
Cryptosporidium and other
microbial contaminants
are available from the Safe
Drinking Water Hotline at
1-800-426-4791.

Your drinking water is continually sampled and analyzed. We perform tens of thousands of tests throughout the year to ensure your water is clean and safe to use. 2021 ANNUAL WATER QUALITY REPORT 3

WATER QUALITY NOTIFICATIONS

LEAD IN DRINKING WATER
No water provider included in this report detected lead above the regulatory action level in their water supply. If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and plumbing in buildings and homes. Your drinking water supplier is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for at least 30 seconds before using water for drinking or cooking. If you do so, you may wish to collect the flushed water and reuse it for another beneficial purpose, such as watering plants. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline at 1-800-426-4791 or at epa.gov/lead.

LEAD MONITORING IN SCHOOLS
In early 2017, the State Board issued amendments to domestic water supply permits of community water systems so that kindergarten through 12th grade (K–12) schools can request assistance from their water provider to conduct water sampling for lead and receive technical assistance if an elevated lead sample is found. To further safeguard water quality in California’s K–12 public schools, California Assembly Bill 746, effective January 1, 2018, required community water systems to test lead levels, by July 1, 2019, in drinking water at all California public K–12 schools, preschools, and child care facilities located on public school property constructed before January 1, 2010.

To find out more about the Lead Sampling of Drinking Water in Schools initiative, visit waterboards.ca.gov/drinking_water/ certlic/drinkingwater/leadsamplinginschools.shtml.

FLUORIDE
To prevent tooth decay, fluoride is added to your drinking water.

This is a long-standing practice that has improved public health over many years. To read about fluoridation, visit waterboards.ca.gov/drinking_water/certlic/drinkingwater/ Fluoridation.shtml.

CRYPTOSPORIDIUM
Cryptosporidium is a microbial pathogen
found in surface water throughout the U.S.

Most healthy individuals can overcome the disease within a few weeks. However, immunocompromised people, infants and
small children, and the elderly are at greater risk of developing life-threatening illness. We encourage immunocompromised individuals to consult their doctor regarding appropriate precautions to take to avoid infection. Cryptosporidium must be ingested to cause disease, and it may be spread through means other than drinking water.

Reservoirs
strategically
placed in high
points throughout
our service areas store
millions of gallons of
treated water that is used
by homes, businesses and
firefighters!
Skilled operators use sophisticated technology to control the systems that treat your drinking water and move it to reach the 500,000 people who depend on it every day.
2021 ANNUAL WATER QUALITY REPORT4

THE SOURCE OF YOUR WATER
Nearly every drop of water delivered by Contra Costa Water District originates in the Sacramento-San Joaquin River Delta.

THE DEL TA
HONKER
BA Y
CGSWCG

PITT SBUR G

A NTI OC H

DIABL O

WA TER DI STRI CT

BRENT WOO D

MA RTINE Z
CC WD

T REA TED WATER

SERVI CE A REA

CLIFT ON
COURT

FOREB AY
LO S

VA QUEROS

RESERVOIR

ANTIOCHANTIOCH

RESERVOIRRESERVOIR

ANTIOCH

R ESERVOIR

CONTR ACONTR A

LOMALOMA

RESERVOIRRESERVOIR

CONTR A
LOMA

R ESERVOIR

MALLARDMALLARD

R ESERVOIRRESERVOIR

SUISUN BA Y

SACRAMENT O R IVER

SAN J O AQUIN RIVER

MALLARD

R ESERVOIR
MIDDLE
RIVER
INTAKE

OLD RIVER
INTAKE
ROCK
SLOUGH
INTAKE

MALLARD

SLOUGH INTAKE
Ralph D. BollmanRalph D. Bollman
WTPWTP
Ralph D. Bollman
WTP
Concord
Port
Costa
Clyde
Pleasant
Hill
Clayton
Port
Chicago
Avon
Oakley
Discovery
Bay
Pacheco
Walnut Creek
Randall-Bold
WTP

CCWD-EBMUDCCWD-EBMUD
Intertie Intertie

CCWD-EBMUD
Intertie
CCWD
Transfer
Facility
CCWD/
City of Brentwood
WTP
District
Center

MART INEZ

YOUR WATER IS SAFE AND RELIABLE

DELIVERING

DURING A DROUGHT

EMERGENCY
Like most of the state, the effects
of three consecutive dry years
are straining local water supplies.

Snowmelt that typically filled rivers and
reservoirs instead soaked into the parched
earth. Indeed, the first three months of 2022
were some of the driest on record since 1920. The
Central Valley Project, which supplies water to Contra
Costa Water District, will deliver just a fraction of our usual allocation.

Thanks to our customers’ wise investment in Los Vaqueros Reservoir and their strong commitment to using water efficiently, local water storage levels mean we have sufficient supply this year to meet the efficient water needs of our customers. However, we still need your help eliminating wasteful water uses, reducing discretionary water uses, and getting the most value out of every drop.

MONITOR YOUR USE
One of the best ways to reduce your water use and help sustain our community through this drought is to know when and where you are using water. If you know when and where you are using water, you will have an easier time making small changes that add up to big savings! While each water provider offers unique ways for customers to track use, everyone can track their water use by regularly reading their own water meter. Additionally, for a small cost, customers can install a smart home water monitor to get real time usage statistics and leak alerts!
TIPS TO #CONSERVEINCONTRACOSTA
Learn how to save water and share your own tips with the hashtag #ConserveinContraCosta! To spread water-saving tips, Contra Costa Water District is producing a series of videos called Conserving in Contra Costa. These short and informative videos provide practical tips that you can quickly and easily put into practice.

View these videos and learn more about the rebates, resources, services available during this drought at ccwater.com/drought
Questions about this drought and what you can do to help? Contact your water provider using the phone numbers on the cover of this report.

SAFE FROM COVID-19
Existing filtration and disinfection processes in our water treatment systems remove and kill viruses including the coronavirus. While water quality was unaffected by this new virus in our community, operations were adjusted to ensure the skilled workforce that treats, operates, and maintains your water remained healthy and able to keep your public water system functioning. Coronavirus does not pose a threat to the water you depend on for drinking, bathing, washing, and so much more.

Additional information about coronavirus and drinking water is available at epa.gov/coronavirus/coronavirus-and-drinking-water-and-wastewater. 2021 ANNUAL WATER QUALITY REPORT6

Constituents may vary from provider to provider depending on water source and treatment techniques. Please see ccwater.com for a list of constituents tested but not detected.

PROVIDER
State
or
Federal
Goal
Highest
Amount
Allowed
Range
Detected Average Major Source in Drinking WaterInorganic

0.5–1.0
2021 ANNUAL WATER QUALITY REPORT 7

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2021 * Randall-Bold Water Treatment Plant is a regular source of water for CCWD, Diablo Water District and the Golden State Water Company in Bay Point. It is also an as-needed source of water for Antioch and Brentwood and an
emergency source for Pittsburg.

If you have any questions about Contra
Costa Water District tap water, please
call 925-688-8091.

CCWD RANDALL-BOLD
WTP*

CCWD-BRENTWOOD
WTP
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Range
Detected Average Major Source in Drinking Water
Fluoride (mg/L) 1 2 0.6-0.8 0.7 0.6-0.8 0.7 ND-0.1 ND Erosion of natural deposits; water additive that promotes strong teeth
Nitrate as N (mg/L) 10 10 ND-0.4 ND ND-0.8 0.3 ND-0.7 ND Runoff and leaching from fertilizer use Lead and Copper State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile
# of Sites
T ested/#
Exceeding AL
90%
Percentile
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking Water
Lead (µg/L) 0.2 15 55/0 ND n/a n/a n/a n/a Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
Copper (mg/L) 0.3 1.3 55/0 0.14 n/a n/a n/a n/a Internal corrosion of household water plumbing systems; erosion of natural deposits; leaching from wood preservatives
Date of Study 6/2019 n/a n/a Next Monitoring in 2022
Microbiological
Standards
State or
Federal Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Average or
[Monthly %
of Samples
that Meets
Requirement]
Range or
[Maximum
Value]
Average or
[Monthly %
of Samples
that Meets
Requirement]
Range or
[Maximum
Value]
Average or
[Monthly %
of Samples
that Meets
Requirement]
Major Source in Drinking Water
T otal Coliform
(State T otal Coliform Rule) n/a 5% of mo.

Samples 0%-1.9% 0.2% n/a n/a n/a n/a Naturally present in the environment T urbidity (NTU)
(treatment plant) n/a 95% ≤ 0.3 [0.15] [100%] [0.09] [100%] [0.18] [100%] Soil runoff Disinfectant/Disin-
fection Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Range
Detected
Highest
Quarterly RAA
Range
Detected
Highest
Quarterly RAA Major Source in Drinking Water
Bromate (µg/L) 0.1 10 ND-17 6 ND-10 ND ND ND Byproduct of drinking water disinfection Chloramines as CI2 (mg/L) n/a 4 ND-3.8 1.6 n/a n/a n/a n/a Drinking water disinfectant added for treatment Haloacetic acids (µg/L) n/a 60 2.0-26 19 n/a n/a n/a n/a Byproduct of drinking water disinfection T otal trihalomethanes
(µg/L) n/a 80 6.4-48 32 n/a n/a n/a n/a Byproduct of drinking water disinfection SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Range
Detected Average Major Source in Drinking Water
Chloride (mg/L) n/a 250 68-110 94 68-113 88 64-150 106 Runoff/leaching from natural deposits; seawater influence Copper (mg/L) n/a 1.0 0.02 n/a 0.01 n/a ND n/a Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives
Foaming agents (MBAS)
(µg/L) n/a 500 220 n/a 47 n/a 200 n/a Municipal and industrial waste discharges Odor-threshold (units) n/a 3 ND n/a ND-1.0 ND ND n/a Naturally-occurring organic materials Specific conductivity
(µmhos/cm) n/a 900 604-699 643 574-714 631 510-807 650 Substances that form ions when in water; seawater influence Sulfate (mg/L) n/a 250 67-90 78 51-96 82 40-91 70 Runoff/leaching from natural deposits; industrial wastes T otal dissolved solids
(mg/L) n/a 500 326-378 346 312-369 342 283-415 345 Runoff/leaching from natural deposits T urbidity (NTU)
(distribution system) n/a 5 0.06-0.69 0.23 n/a n/a n/a n/a Soil runoff GENERAL WATER QUALITY PARAMETERS Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Range
Detected Average
Alkalinity (mg/L) n/a n/a 75-97 84 67-100 84 64-100 79
Ammonia (mg/L) n/a n/a 0.7 n/a 0.5 n/a 0.6 n/a
Bromide (mg/L) n/a n/a 0.1-0.2 0.2 0.2-0.3 0.2 0.1-0.3 0.2 Calcium (mg/L) n/a n/a 22-30 25 20-31 26 17-32 22
Hardness (mg/L) n/a n/a 116-138 125 111-142 128 94-140 119 Magnesium (mg/L) n/a n/a 13-15 15 13-16 14 13-16 15
pH n/a n/a 7.7-8.5 8.2 7.8-8.6 8.1 7.8-8.7 8.2
Potassium (mg/L) n/a n/a 2.8-3.9 3.5 2.7-4.1 3.4 2.8-4.5 3.7 Sodium (mg/L) n/a n/a 65-84 77 61-85 75 63-110 80
UCMR4 ASSESSMENT MONITORING 2018–2020
State or
Federal Goal
Notification
Level
Range
Detected Average Range
Detected Average Range
Detected Average
Manganese (µg/L) n/a 500 1.2-6.8 3.6 0.9-45 12 1.8-4.1 3.2 HAA5 (µg/L) n/a n/a 1.6-14 6.6 n/a n/a n/a n/a
HAA Br (µg/L) n/a n/a 1.4-15 7.1 n/a n/a n/a n/a
HAA9 (µg/L) n/a n/a 2.5-25 11 n/a n/a n/a n/a
T otal Organic Carbon
(TOC) (µg/L) n/a n/a 2800-4200 3475 2000-4300 3000 2100-5400 3525 Bromide (µg/L) n/a n/a 110-236 189 88-275 191 89-262 176

UNTREATED WATER TEST RESULTS
Radiochemistry State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Range
Detected Average
Gross Alpha (pCi/L) n/a 15 6.7 n/a 6.7 n/a 6.7 n/a
Gross Beta (pCi/L) 0 50 5.7 n/a 5.7 n/a 5.7 n/a

CITY OF ANTIOCH
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
Fluoride (mg/L) 1 2 0.6-1.1 0.80 Erosion of natural deposits; water additive that promotes strong teeth
Nitrate as N (mg/L) 10 10 ND-1.0 ND Runoff and leaching from fertilizer use Lead and Copper State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking Water
Lead (µg/L) 0.2 15 50/0 < 0.005 Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
Copper (mg/L) 0.3 1.3 50/0 0.084 Internal corrosion of household water plumbing systems; erosion of natural deposits; leaching from wood preservatives
Date of Study 9/2021
Microbiological
Standards
State or
Federal Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Average or
[Monthly %
of Samples
that Meets
Requirement]
Major Source in Drinking Water
T otal Coliform
(State T otal Coliform
Rule)
n/a 5% of mo.

Samples 0%-1.0% 0.2% Naturally present in the environment T urbidity (NTU)
(treatment plant) n/a 95% ≤ 0.3 [0.1] [99.9%] Soil runoff Disinfectant/Disin-
fection Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA Major Source in Drinking Water
Chloramines as CI2
(mg/L) n/a 4 0.3-3.9 2.3 Drinking water disinfectant added for treatment Haloacetic acids
(µg/L) n/a 60 6.0-7.0 6.5 Byproduct of drinking water disinfection T otal trihalomethanes
(µg/L) n/a 80 51-55 54 Byproduct of drinking water disinfection SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
Chloride (mg/L) n/a 250 92-100 96 Runoff/leaching from natural deposits; seawater influence Odor-threshold (units) n/a 3 1.0-4.0 2.0 Naturally-occurring organic materials Specific conductivity
(µmhos/cm) n/a 900 610-630 620 Substances that form ions when in water; seawater influence Sulfate (mg/L) n/a 250 62-63 62 Runoff/leaching from natural deposits; industrial wastes T otal dissolved solids
(mg/L) n/a 500 330-340 335 Runoff/leaching from natural deposits T urbidity (NTU)
(distribution system) n/a 5 0.04-0.22 0.07 Soil runoff

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 74-133 100
Calcium (mg/L) n/a n/a 15-77 26
Hardness (mg/L) n/a n/a 81-149 128
Magnesium (mg/L) n/a n/a 15 n/a
pH n/a n/a 7.7-9.2 8.5
Potassium (mg/L) n/a n/a 3.8 n/a
Sodium (mg/L) n/a n/a 84 n/a
UCMR4 ASSESSMENT MONITORING 2018–2020
State or
Federal Goal
Notification
Level
Range
Detected Average
Manganese (µg/L) n/a 500 1.0-7.8 3.6
HAA5 (µg/L) n/a n/a 1.7-12 4.8
HAA Br (µg/L) n/a n/a 0.7-12 5.2
HAA9 (µg/L) n/a n/a 2.4-21 8.9
T otal Organic Carbon
(TOC) (µg/L) n/a n/a 2500-3900 3200
Bromide (µg/L) n/a n/a 130-360 238

UNTREATED WATER TEST RESULTS
Radiochemistry State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Gross Alpha (pCi/L) n/a 15 6.7 n/a
Gross Beta (pCi/L) 0 50 5.7 n/a
2021 ANNUAL WATER QUALITY REPORT8

CITY OF ANTIOCH

SOURCE OF WATER
The City of Antioch
purchases untreated water
from CCWD, treats it in
a City-owned treatment
plant and delivers it to
customers through the
City’s distribution pipes.

The City is also able to
pump directly from the San
Joaquin River or purchase
treated water from CCWD.

TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2021

CITY OF

MARTINEZ
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
Fluoride (mg/L) 1 2 0.6-0.8 0.7 Erosion of natural deposits; water additive that promotes strong teeth
Lead and Copper State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking Water
Lead (µg/L) 0.2 15 57 / 0 8.2 Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
Copper (mg/L) 0.3 1.3 57 / 0 0.15 Internal corrosion of household water plumbing systems; erosion of natural deposits; leaching from wood preservatives
Date of Study 6/2021
Microbiological
Standards
State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Monthly %
of Samples
that Meets
Requirement
Major Source in Drinking Water
T urbidity (NTU)
(treatment plant) n/a 95% ≤ 0.3 0.15 100% Soil runoff
Disinfectant/Disin-
fection Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA Major Source in Drinking Water
Chloramines as CI2 (mg/L) 4 0.1-3.2 1.7 Drinking water disinfectant added for treatment Haloacetic acids (µg/L) n/a 60 ND-5.8 4 Byproduct of drinking water disinfection T otal trihalomethanes
(µg/L) n/a 80 16-44 27 Byproduct of drinking water disinfection SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
Chloride (mg/L) n/a 250 92-110 101 Runoff/leaching from natural deposits; seawater influence Odor-threshold (units) n/a 3 ND-4.0 1.7 Naturally-occurring organic materials Specific conductivity
(µmhos/cm) n/a 900 570-680 625 Substances that form ions when in water; seawater influence Sulfate (mg/L) n/a 250 58-63 61 Runoff/leaching from natural deposits; industrial wastes T otal dissolved solids
(mg/L) n/a 500 294-497 373 Runoff/leaching from natural deposits T urbidity (NTU)
(distribution system) n/a 5 0.05-0.21 0.09 Soil runoff

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 69-111 92
Bromide (mg/L) n/a n/a 0.2-0.4 0.3
Calcium (mg/L) n/a n/a 26-27 27
Hardness (mg/L) n/a n/a 62-142 121
Magnesium (mg/L) n/a n/a 14-15 15
pH n/a n/a 8.6-9.3 9.0
Potassium (mg/L) n/a n/a 3.2-3.7 3.5
Sodium (mg/L) n/a n/a 71-83 77
UCMR4 ASSESSMENT MONITORING 2018–2020
State or
Federal Goal
Notification
Level
Range
Detected Average
Manganese (µg/L) n/a 500 0.4-5.0 3.1
HAA5 (µg/L) n/a n/a 0.3-4.4 2.4
HAA Br (µg/L) n/a n/a 0.6-5.1 2.7
HAA9 (µg/L) n/a n/a 1.0-7.1 3.8
T otal Organic Carbon
(TOC) (µg/L) n/a n/a 2800-4400 3667
Bromide (µg/L) n/a n/a 110-310 227

UNTREATED WATER TEST RESULTS
Radiochemistry State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Gross Alpha (pCi/L) n/a 15 6.7 n/a
Gross Beta (pCi/L) 0 50 5.7 n/a
2021 ANNUAL WATER QUALITY REPORT 9

CITY OF MARTINEZ

TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2021 2021 ANNUAL WATER QUALITY REPORT10

SOURCE OF WATER
The City of Pittsburg
purchases untreated water
from CCWD, treats it in
a City-owned treatment
plant and delivers it to
customers through the
City’s distribution pipes.

In addition to the water it
buys from CCWD, the City
is able to pump water from
two wells.

CITY OF PITTSBURG
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2021

CITY OF

PITTSBURG
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
Aluminum (mg/L) 0.6 1 0.05-0.12 0.09 Erosion of natural deposits; residue from some surface water treatment processes
Fluoride (mg/L) 1 2 0.5-0.8 0.7 Erosion of natural deposits; water additive that promotes strong teeth
Lead and Copper State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking Water
Lead (µg/L) 0.2 15 53 / 0 ND Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
Copper (mg/L) 0.3 1.3 53 / 0 ND Internal corrosion of household water plumbing systems; erosion of natural deposits; leaching from wood preservatives
Date of Study 8/2021
Microbiological
Standards
State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Monthly %
of Samples
that Meets
Requirement
Major Source in Drinking Water
T urbidity (NTU)
(treatment plant) n/a 95% ≤ 0.3 0.13 100% Soil runoff
Disinfectant/Disin-
fection Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA Major Source in Drinking Water
Chlorite (mg/L) 0.05 1 ND-0.4 0.4 Byproduct of drinking water disinfection Chloramines as CI2 (mg/L) n/a 4 0.2-2.2 1.6 Drinking water disinfectant added for treatment Haloacetic acids (µg/L) n/a 60 ND -7 7 Byproduct of drinking water disinfection T otal trihalomethanes
(µg/L) n/a 80 40-74 59 Byproduct of drinking water disinfection SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Major Source in Drinking Water
Aluminum (µg/L) n/a 200 50-120 87 Erosion of natural deposits; residue from some surface water treatment processes
Chloride (mg/L) n/a 250 71-158 116 Runoff/leaching from natural deposits; seawater influence Odor-threshold (units) n/a 3 1.3-1.6 1.3 Naturally-occurring organic materials Specific conductivity
(µmhos/cm) n/a 900 648-902 777 Substances that form ions when in water; seawater influence Sulfate (mg/L) n/a 250 62-100 78 Runoff/leaching from natural deposits; industrial wastes T otal dissolved solids (mg/L) n/a 500 355-513 440 Runoff/leaching from natural deposits T urbidity (NTU)
(distribution system) n/a 5 0.07-0.25 0.11 Soil runoff

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 90-183 119
Ammonia (mg/L) n/a n/a ND-0.4 0.2
Calcium (mg/L) n/a n/a 37 n/a
Hardness (mg/L) n/a n/a 91-214 185
Magnesium (mg/L) n/a n/a 20 n/a
pH n/a n/a 7.0-8.8 8.48
Potassium (mg/L) n/a n/a 4.2 n/a
Sodium (mg/L) n/a n/a 86 n/a
UCMR4 ASSESSMENT MONITORING 2018–2020
State or
Federal Goal
Notification
Level
Range
Detected Average
Manganese (µg/L) n/a 500 3.2-5.3 3.9
HAA5 (µg/L) n/a n/a 1.7-8.6 5.4
HAA Br (µg/L) n/a n/a 1.0-16 8.4
HAA9 (µg/L) n/a n/a 2.7-20 12
T otal Organic Carbon
(TOC) (µg/L) n/a n/a 2100-4200 2975
Bromide (µg/L) n/a n/a 45-260 115

UNTREATED WATER TEST RESULTS
Radiochemistry State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Uranium (pCi/L) 0.43 20 1.7 n/a

DIABLO WATER DISTRICT

TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2021

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*
PRIMARY DRINKING WATER STANDARDS Contaminants that may affect health Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Major Source in Drinking Water
Fluoride (mg/L) 1 2 0.6-0.8 0.7 0.6-0.8 0.7 Erosion of natural deposits; water additive that promotes strong teeth
Nitrate as N (mg/L) 10 10 ND-0.8 0.4 ND-0.8 0.3 Runoff and leaching from fertilizer use Lead and Copper State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/#
Exceeding AL
90%
Percentile
# of Sites
T ested/#
Exceeding AL
90%
Percentile Major Source in Drinking Water
Lead (µg/L) 0.2 15 30/0 0.6 n/a n/a
Internal corrosion of household water plumbing
systems; discharges from industrial
manufacturers; erosion of natural deposits
Copper (mg/L) 0.3 1.3 30/0 0.14 n/a n/a
Internal corrosion of household water
plumbing systems; erosion of natural deposits;
leaching from wood preservatives
Date of Study 6/2019
Microbiological Standards State or
Federal Goal
Highest Amt.

Allowed
Maximum
Value
Monthly %
of Samples
that Meets
Requirement
Maximum
Value
Monthly %
of Samples
that Meets
Requirement
Major Source in Drinking Water
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 n/a n/a 0.09 100% Soil runoff Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly
RAA
Range
Detected
Highest
Quarterly
RAA
Major Source in Drinking Water
Bromate (µg/L) 0.1 10 n/a n/a ND-10 ND Byproduct of drinking water disinfection Chloramines as CI2 (mg/L) n/a 4 0.3-3.8 2.4 n/a n/a Drinking water disinfectant added for treatment Haloacetic acids (µg/L) n/a 60 2.4-12 9 n/a n/a Byproduct of drinking water disinfection T otal trihalomethanes (µg/L) n/a 80 6.5-19 13 n/a n/a Byproduct of drinking water disinfection SECONDARY DRINKING WATER STANDARDS Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Major Source in Drinking Water
Chloride (mg/L) n/a 250 67-110 88 68-113 88 Runoff/leaching from natural deposits; seawater influence
Copper (mg/L) n/a 1.0 ND n/a 0.01 n/a
Internal corrosion of household plumbing
systems; erosion of natural deposits; leaching
from wood preservatives
Foaming agents (MBAS) (µg/L) n/a 500 1700 n/a 47 n/a Municipal and industrial waste discharges Odor-threshold (units) n/a 3 1.0 n/a ND-1.0 n/a Naturally-occurring organic materials Specific conductivity (µmhos/cm) n/a 900 568-730 643 574-714 ND Substances that form ions when in water; seawater influence
Manganese (µg/L) n/a 50 ND-370 43 ND n/a Leaching from natural deposits Sulfate (mg/L) n/a 250 51-100 84 51-96 82 Runoff/leaching from natural deposits; industrial wastes
T otal dissolved solids (mg/L) n/a 500 312-402 351 312-369 342 Runoff/leaching from natural deposits T urbidity (NTU) (distribution system) n/a 5 0.06-0.85 0.26 n/a n/a Soil runoff

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Alkalinity (mg/L) n/a n/a 60-124 90 67-100 84
Ammonia (mg/L) n/a n/a 0.7 n/a 0.5 n/a
Bromide (mg/L) n/a n/a 0.2-0.3 0.2 0.2-0.3 0.2
Calcium (mg/L) n/a n/a 20-37 27 20-31 26
Hardness (mg/L) n/a n/a 107-168 128 111-142 128
Magnesium (mg/L) n/a n/a 13-19 15 13-16 14
pH n/a n/a 8.0-8.9 8.3 7.8-8.6 8.1
Potassium (mg/L) n/a n/a 2.9-4.1 3.4 2.7-4.1 3.4
Sodium (mg/L) n/a n/a 62-89 76 61-85 75
UCMR4 ASSESSMENT MONITORING 2018–2020
State or
Federal Goal
Notification
Level
Range
Detected Average Range
Detected Average
Manganese (µg/L) n/a 500 2.7-62 19 0.9-45 12
HAA5 (µg/L) n/a n/a 2.5-9.5 5.1 n/a n/a
HAA Br (µg/L) n/a n/a 3.1-14 6.1 n/a n/a
HAA9 (µg/L) n/a n/a 3.6-18 8.6 n/a n/a
T otal Organic Carbon (TOC) (µg/L) n/a n/a 2000-
4400 3275 2000-
4300 3000
Bromide (µg/L) n/a n/a 89-262 176 88-275 191

UNTREATED WATER TEST RESULTS
Radiochemistry State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Gross Alpha (pCi/L) n/a 15 6.7 n/a 6.7 n/a
Gross Beta (pCi/L) 0 50 5.7 n/a 5.7 n/a

PUBLIC MEETINGS
Fourth Wednesday
6:30 p.m.
87 Carol Lane
Oakley, CA 94561
925-625-3798
diablowater.org
If you have any
questions about
Diablo Water District
tap water, please call
925-625-2112.

WANT MORE
INFORMATION?
Contra Costa Water District’s website
contains valuable information about
your water service. Visit ccwater.com to
begin your research.

This report contains important information about your drinking water. Have someone translate it for you, or speak with someone who understands it.

Su informe anual de la calidad del agua en español está disponible en línea en ccwater.com/awqr_es. Este informe contiene información importante sobre su agua potable.

Mahalaga ang impormasyong ito. Mangyaring ipasalin ito.

Art by Allison, Concord
TO OUR CUSTOMERS:

We are pleased to present the Annual Water Quality Report that shows the high quality of your drinking water. As the water providers to more than 500,000 people, we take great effort and pride in delivering a product that exceeds all drinking water standards set by the state and federal governments. This report includes water quality data collected throughout 2022 and answers questions you might have about your tap water. For detailed test results, see pages 8-17.

You can be confident your tap water is of a high quality. Frequent testing for water quality and regular improvements in the treatment process keeps your drinking water among the best in the country. Additionally, your water providers are committed to prudent capital investments that ensure a reliable, well-maintained system that delivers high-quality water around the clock.

We hope you find this report useful in illustrating the high quality of your water service. If you have questions about the tap water in your community, please call your water provider using the contact list on the right.

CONTRA COSTA WATER DISTRICT
Erin Gomez | 925-688-8091

CITY OF ANTICOH
Ivona Kagin | 925-779-7024

CITY OF MARTINEZ
Hiren Patel | 925-372-3588

CITY OF PITTSBURG
Ana Corti | 925-252-6916

DIABLO WATER DISTRICT
Nacho Mendoza | 925-625-2112

GOLDEN STATE WATER COMPANY
800-999-4033

CITY OF BRENTWOOD
James Wolfe | 925-516-6000
YOUR

DRINKING
WATER IN 2022

ANNUAL WATER QUALITY REPORT

CONTAMINANTS THAT MAY BE PRESENT

IN SOURCE WATER
Microbial contaminants include viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

Pesticides and herbicides may come from a variety of sources, such as agriculture, urban stormwater runoff and residential uses.

Radioactive contaminants can be naturally occurring or be the result of oil and gas production and mining activities.

In order to ensure that tap water is safe to drink, the U.S.

US EPA/Centers for Disease
Control (CDC) guidelines
on appropriate means to
lessen the risk of infection by
Cryptosporidium and other
microbial contaminants
are available from the Safe
Drinking Water Hotline at
1-800-426-4791.

Your drinking water is continually sampled and analyzed. We perform tens of thousands of tests throughout the year to ensure your water is clean and safe to use. 2022 ANNUAL WATER QUALITY REPORT
2 WATER QUALITY NOTIFICATIONS

FLUORIDE
To prevent tooth decay, fluoride is added to your drinking water.

This is a long-standing practice that has improved public health over many years. To read about fluoridation, visit waterboards.ca.gov/drinking_water/certlic/drinkingwater/ Fluoridation.shtml.

Current test methods do not allow us to determine if the organisms are dead or if they are capable of causing disease.

Ingestion of Cryptosporidium may cause cryptosporidiosis, an abdominal infection. Symptoms of infection include nausea, diarrhea, and abdominal cramps. Most healthy individuals can overcome the disease within a few weeks. However, immuno- compromised people, infants and small children, and the elderly are at greater risk of developing life-threatening illness.

We encourage immuno-compromised individuals to consult
their doctor regarding appropriate precautions to take to avoid infection. Cryptosporidium must be ingested to cause disease, and it may be spread through means other than drinking water.

In 2022, in
addition to
maintaining high
water quality for
customers, Los Vaqueros
Reservoir helped meet the
supply challenges of an
extended drought.

The nearly 90-year-old main section of the Contra Costa Canal, which stretches from Oakley to north Concord, delivers every drop of water we serve to customers. 2022 ANNUAL WATER QUALITY REPORT
3 THE SOURCE OF YOUR WATER
Nearly every drop of water delivered by Contra Costa Water District originates in the Sacramento-San Joaquin River Delta.

THE DEL TA
HONKER
BA Y
CGSWCG

PITT SBUR G

A NTI OC H

DIABL O

WA TER DI STRI CT

BRENT W OO D

MA RTINE Z
CC WD

T REA TED WATER

SERVI CE AREA

CLIFT ON
COURT

FOREB AY
LO S

VA QUEROS

RESERVOIR

ANTIOCHANTIOCH

RESERVOIRRESERVOIR

ANTIOCH

R ESERVOIR

CONTR ACONTR A

LOMALOMA

RESERVOIRRESERVOIR

CONTR A
LOMA

R ESERVOIR

MALLARDMALLARD

R ESERVOIRRESERVOIR

SUISUN BA Y

SACRAMENT O R IVER

SAN J O AQUIN RIVER

MALLARD

R ESERVOIR
MIDDLE
RIVER
INTAKE

OLD RIVER
INTAKE
ROCK
SLOUGH
INTAKE

MALLARD

SLOUGH INTAKE
Ralph D. BollmanRalph D. Bollman
WTPWTP
Ralph D. Bollman
WTP
Concord
Port
Costa
Clyde
Pleasant
Hill
Clayton
Port
Chicago
Avon
Oakley
Discovery
Bay
Pacheco
Walnut Creek
Randall-Bold
WTP

CCWD-EBMUDCCWD-EBMUD
Intertie Intertie

CCWD-EBMUD
Intertie
CCWD
Transfer
Facility
CCWD/
City of Brentwood
WTP
District
Center

MART INEZ

R ESERVOIR
680
680
680
680
780
4 4
4 4
160
160
4 4
J4
24 242
4 Contra Costa Water District Boundary
Contra Costa Canal
Multi-Purpose Pipeline
Los Vaqueros Pipeline
Shortcut Pipeline
2022 ANNUAL WATER QUALITY REPORT
4 THENTHEN TODAYTODAY TOMORROWTOMORROW
CapacityCapacity 100,000 acre-feet100,000 acre-feet 160,000 acre-feet160,000 acre-feet 275,000 acre-feet275,000 acre-feet Dam HeightDam Height 197 feet197 feet 226 feet226 feet 287 feet287 feet CostCost $350 million$350 million $120 million$120 million $980 million$980 million

LOS VAQUEROS

A QUARTER CENTURY OF SUCCESS
Los Vaqueros Reservoir has been an
invaluable investment by Contra Costa
Water District customers to improve water
quality and to help our communities
withstand several droughts; this year was
no exception. December 24, 2022, marked
the 25th anniversary of the original Los Vaqueros Reservoir’s construction—a monumental project for its time that has proven its value repeatedly through enhanced water quality, improved water supply, and drought protection.

In 1997, construction of California’s first dam in nearly two decades was complete and only a year later was nearly full of fresh Delta water. An off-stream reservoir built to improve water quality ensured Contra Costa Water District customers would receive high-quality water at all times of the year. In its first year, chloride levels were about three times lower than the goal and a vast improvement over water quality conditions before Los Vaqueros Reservoir was built.

Did you know? Los Vaqueros is an off-stream reservoir. That means it does not block a major waterway and surrounding habitat. Instead all the water stored in Los Vaqueros is pumped in from another source—in our case, the Delta!

THE THREE PHASES OF LOS VAQUEROS
Los Vaqueros Reservoir has reliably served our customers.

Originally constructed in 1997, the reservoir was expanded in 2012 to supply additional storage benefits. Now, we’re looking to expand the reservoir—and those benefits—for water users throughout the region. A future expansion of Los Vaqueros Reservoir also adds a new revenue stream for CCWD.

LOS VAQUEROS RESERVOIR EXPANSION PHASE 2
Contra Costa Water District continues to evaluate the Phase 2 expansion of the Los Vaqueros Reservoir to increase capacity from 160,000 acre-feet to 275,000 acre-feet. The Phase 2 expansion involves both an expanded reservoir
as well as new and expanded pump
stations and pipelines. The larger reservoir will provide additional benefits to our customers and extend benefits to new project partners, who will help fund this expansion along with state and federal funding. Prior customer investments will continue to provide future benefits, and project partners will be paying a rental fee to reflect these prior investments.

Contra Costa Water District will continue to own, operate, and maintain the facilities and ensure Contra Costa Water District customer needs are met as a priority once the facilities are expanded.

The Los Vaqueros Reservoir Joint Powers Authority, of which Contra Costa Water District is a member, was formed in 2021 to finance the Phase 2 expansion and has since appointed an Executive Director. Development of permits, agreements, and design are ongoing.

Learn about the project at ccwater.com/lvstudies and
about the JPA at losvaquerosjpa.com
2022 ANNUAL WATER QUALITY REPORT
5 DEFINITIONS & ABBREVIATIONS
Action Level (AL) – The concentration of
a contaminant which, if exceeded, triggers
treatment or other requirements which a water
system must follow
Maximum Contaminant Level (MCL) – The
highest level of a contaminant that is allowed
in drinking water. Primary MCLs are set as close
to the PHGs (or MCLGs) as is economically or
technologically feasible
Maximum Contaminant Level Goal (MCLG) –
The level of a contaminant in drinking water
below which there is no known or expected risk to
health. MCLGs are set by the U.S. Environmental
Protection Agency
Maximum Residual Disinfectant Level (MRDL) –
The highest level of a disinfectant allowed in
drinking water. There is convincing evidence that
the addition of a disinfectant is necessary for
control of microbial contaminants
Maximum Residual Disinfectant Level
Goal (MRDLG) – The level of a drinking water
disinfectant below which there is no known or
expected risk to health. MRDLGs do not reflect
the benefits of the use of disinfectants to control
microbial contaminants
mg/L – Milligrams per liter
n/a – Not analyzed or not applicable (when used in
average column, only one data point is available)
ND – Not detected at or above the reporting level
ng/L – Nanograms per liter
NTU – Nephelometric turbidity units
Primary Drinking Water Standards – MCLs
and MRDLs for contaminants that affect health
along with their monitoring and reporting
requirements, and water treatment requirements
pCi/L – Picocuries per liter (a measure of
radioactivity)
Public Health Goal (PHG) – The level of a
contaminant in drinking water below which there
is no known or expected risk to health. PHGs are
set by the California Environmental Protection
Agency Office of Health and Hazard Assessment
RAA – Running Annual Average
Secondary Drinking Water Standards –
Secondary MCLs are set for contaminants that
affect the odor, taste or appearance of water
Treatment Technique (TT) – A required process
intended to reduce the level of a contaminant in
drinking water
µg/L – Micrograms per liter
µmhos/cm– micromhos per centimeter
(a measure of conductivity)

Constituents may vary from provider to provider depending on water source and treatment techniques. Please see ccwater.com for a list of constituents tested but not detected.

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or Federal
Goal
Highest Amt.

Allowed Range Detected Average
Fluoride (mg/L) 1 2 0.6-0.8 0.7

UNITS EQUIVALENCE
mg/L (milligrams per liter)
ppm (parts per million)
µg/L (micrograms per liter)
ppb (parts per billion)
1 second in 11.5 days
1 second in nearly 32 years
1 2 3
2022 ANNUAL WATER QUALITY REPORT
6 The list below shows common sources for chemicals or constituents that may have been detected in your water. Consult the tables on the following pages to see what was detected in your drinking water.

COMMON SOURCES OF CHEMICALS OR CONSTITUENTS

TYPICAL SOURCE
Aluminum Erosion of natural deposits; residual from some surface water treatment processes Bromate Byproduct of drinking water disinfection
Chloramines Drinking water disinfectant added for treatment Chloride Runoff/leaching from natural deposits; seawater influence Chlorite Byproduct of drinking water disinfection
Color Naturally-occurring organic materials
Copper Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Fluoride Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum factories Foaming Agents Municipal and industrial waste discharges Gross Alpha Erosion of natural deposits
Gross Beta Decay of natural and man-made deposits
Haloacetic Acids Byproduct of drinking water disinfection Lead Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural depos- its
Manganese Leaching from natural deposits
Nitrate Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits Nitrite Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits Odor-Threshold Naturally-occurring organic materials
Specific Conductivity Substances that form ions when in water; seawater influence Sulfate Runoff/leaching from natural deposits; industrial wastes Total Coliform Naturally present in the environment. Starting July 1, 2021, If 5% of monthly total coliform samples are positive for bacteriological activity, a Level 1 T reatment T echnique Exceedance is triggered and requires a Level 1 Assessment.

Total Dissolved Solids Runoff/leaching from natural deposits Total Trihalomethanes Byproduct of drinking water disinfection Turbidity Soil runoff
Uranium Erosion of natural deposits
2022 ANNUAL WATER QUALITY REPORT
7 7

CCWD RANDALL-BOLD
WTP*

CCWD-BRENTWOOD
WTP

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste or appearance of water State or Federal
Goal
Highest Amt.

Allowed Range Detected Average Range Detected Average Range Detected Average Chloride (mg/L) n/a 250 62-109 84 48-128 74 43-145 89
Copper (mg/L) n/a 1.0 0.03 n/a 0.02 0.02 ND n/a
Foaming agents (MBAS) (µg/L) n/a 500 ND n/a ND n/a 41 n/a Odor-threshold (units) n/a 3 ND n/a ND-1 ND ND n/a
Specific conductivity (µmhos/cm) n/a 900 522-644 601 423-692 551 407-746 566 Sulfate (mg/L) n/a 250 54-106 86 58-96 78 57-86 68
T otal dissolved solids (mg/L) n/a 500 288-345 325 223-361 299 219-388 298 T urbidity (NTU) (distribution system) n/a 5 0.1-1.4 0.2 n/a n/a n/a n/a

CCWD RANDALL-BOLD
WTP*

CCWD-BRENTWOOD
WTP

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or Federal
Goal
Highest Amt.

Allowed Range Detected Average Range Detected Average Range Detected Average Barium (mg/L) 2 1 n/a n/a 0.1 n/a n/a n/a
Fluoride (mg/L) 1 2 0.6-0.8 0.7 0.6-0.7 0.7 ND ND
Nitrate as N (mg/L) 10 10 ND-0.2 ND ND-0.5 0.2 ND-0.7 ND Lead and Copper State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
# of Sites
T ested/
# Exceeding AL
90% Percentile
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 67/0 ND n/a n/a n/a n/a
EPA Copper Study (mg/L) 0.3 1.3 67/0 0.2 n/a n/a n/a n/a Date of Study 6/2022 n/a n/a
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T otal Coliform
(Revised T otal Coliform Rule) n/a TT 0%-0.6% 0.1% n/a n/a n/a n/a T urbidity (NTU) (treatment plant) n/a 95% 0.3 [0.24] [100%] [0.23] [100%] [0.08] [100%] Disinfectant/Disinfection
Byproducts
State or Federal
Goal
Highest Amt.

Allowed Range Detected Highest
Quarterly RAA Range Detected Highest
Quarterly RAA Range Detected Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 ND-17 5 ND-13 ND ND ND
Chloramines as Cl2 (mg/L) 4 ND-3.5 1.7 n/a n/a n/a n/a
Haloacetic acids (µg/L) n/a 60 3.0-34 27 n/a n/a n/a n/a T otal T rihalomethanes (µg/L) n/a 80 10-38 33 n/a n/a n/a n/a

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022 2022 ANNUAL WATER QUALITY REPORT
8 * Randall-Bold Water Treatment Plant is a regular source of water for CCWD, Diablo Water District and the Golden State Water Company in Bay Point. It is also an as-needed source of water for Antioch and Brentwood and an
emergency source for Pittsburg.

CCWD RANDALL-BOLD WTP* CCWD-BRENTWOOD
WTP

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Range
Detected Average
Alkalinity (mg/L) n/a n/a 50-90 70 40-102 67 48-77 61
Ammonia (mg/L) n/a n/a 0.7 n/a 0.6 n/a 0.5 n/a
Bromide (mg/L) n/a n/a 0.1-0.2 0.2 ND-0.2 0.2 ND-0.3 0.1 Calcium (mg/L) n/a n/a 18-29 24 13-33 23 13-23 19
Hardness (mg/L) n/a n/a 99-134 119 70-142 110 87-133 101 Magnesium (mg/L) n/a n/a 12-15 14 9-15 13 10-17 13
pH n/a n/a 7.5-8.4 8.0 7.5-8.1 7.7 7.6-8.9 8.1
Potassium (mg/L) n/a n/a 2.7-3.6 3.2 2.2-4.0 2.9 2.1-4.4 3.1 Sodium (mg/L) n/a n/a 59-75 71 53-87 65 44-98 68

PUBLIC MEETINGS
First and Third Wednesday
6:30 p.m.
1331 Concord Avenue
Concord, CA 94520
925-688-8000
ccwater.com
CCWD RANDALL-BOLD WTP* CCWD-BRENTWOOD
WTP
UCMR4 ASSESSMENT MONITORING
2018–2020
State or
Federal Goal
Notification
Level
Range
Detected Average Range
Detected Average Range
Detected Average
Manganese (µg/L) n/a 500 1.2-6.8 3.6 0.9-45 12 1.8-4.1 3.2 HAA5 (µg/L) n/a n/a 1.6-14 6.6 n/a n/a n/a n/a
HAA Br (µg/L) n/a n/a 1.4-15 7.1 n/a n/a n/a n/a
HAA9 (µg/L) n/a n/a 2.5-25 11 n/a n/a n/a n/a
T otal Organic Carbon (TOC) (µg/L) n/a n/a 2800-4200 3475 2000-4300 3000 2100-5400 3525 Bromide (µg/L) n/a n/a 110-236 189 88-275 191 89-262 176 CCWD RANDALL-BOLD WTP* CCWD-BRENTWOOD
WTP

UNTREATED WATER TEST RESULTS
Radiochemistry State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Range
Detected Average
Gross Alpha (pCi/L) n/a 15 ND-4.5 3.0 ND-4.5 3.0 ND-4.5 3.0 Gross Beta (pCi/L) 0 50 ND-5.2 3.2 ND-5.2 3.2 ND-5.2 3.2 If you have any questions about Contra Costa Water
District tap water, please call
925-688-8091.

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022 2022 ANNUAL WATER QUALITY REPORT
9 SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Chloride (mg/L) n/a 250 65-120 92
Copper (mg/L) n/a 1.0 ND-0.03 0.01
Specific conductivity (µmhos/cm) n/a 900 590-650 620
Sulfate (mg/L) n/a 250 46-50 48
T otal dissolved solids (mg/L) n/a 500 350 350
T urbidity (NTU) (distribution system) n/a 5 0.02-2.4 0.08

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Fluoride (mg/L) 1 2 0.5-0.7 0.6
Nitrate as N (mg/L) 10 10 0.2-0.3 ND
Lead and Copper State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 50/0 < 0.005
EPA Copper Study (mg/L) 0.3 1.3 50/0 0.084
Date of Study 9/2021
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T otal Coliform (State T otal Coliform Rule) n/a TT 0%-1.0% 0.1% T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 [0.3] [99.9%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Chloramines as CI2 (mg/L) 4 0.2-3.8 2.5
Haloacetic acids (µg/L) n/a 60 6.0-9.0 7.0
T otal trihalomethanes (µg/L) n/a 80 44-67 58

SOURCE OF WATER
The City of Antioch purchases untreated
water from CCWD, treats it in a City-owned
treatment plant and delivers it to customers
through the City’s distribution pipes. The
City is also able to pump directly from the
San Joaquin River or purchase treated water
from CCWD, which was the case in 2022. Only
a small percentage of customers received
drinking water from CCWD.

The City completes watershed sanitary
surveys every five years. The last survey,
completed in 2022, concluded that potential
contamination is regularly mitigated by the
natural flushing of the Delta, controls at
contamination sources and existing water
treatment practices.

In April 2003, Antioch conducted a source
water assessment. In summary:
• Antioch Municipal Reservoir was found
to be most vulnerable to sewer collection
systems; this activity is not associated with
contaminants in the water supply.
• San Joaquin River was found to be most
vulnerable to the effects of saltwater
intrusion, chemical/petroleum processing
or storage, and regulated point discharges.

Water from the San Joaquin River is
not always acceptable due to saltwater
intrusion. When chloride levels in the river
exceed 250 milligrams per liter, the City stops
pumping until chloride levels decrease.

CITY OF ANTIOCH
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022 2022 ANNUAL WATER QUALITY REPORT
10 GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 56-142 86
Calcium (mg/L) n/a n/a 22-37 22
Hardness (mg/L) n/a n/a 74-156 108
Magnesium (mg/L) n/a n/a 12-13 12
pH n/a n/a 7.7-9.4 8.4
Potassium (mg/L) n/a n/a 2.8-3.7 3.2
Sodium (mg/L) n/a n/a 58-76 67

PUBLIC MEETINGS
Second and Fourth Tuesdays
7:00 p.m.
200 H Street
Antioch, CA 94509
925-779-7000
www.antiochca.gov
If you have any questions about the
City of Antioch tap water, please call
925-779-7024.

UCMR4 ASSESSMENT MONITORING
2018–2020
State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Manganese (µg/L) n/a 500 1.0-7.8 3.6
HAA5 (µg/L) n/a n/a 1.7-11.9 4.84
HAA Br (µg/L) n/a n/a 0.7-11.8 5.21
HAA9 (µg/L) n/a n/a 2.4-21 8.94
T otal Organic Carbon (TOC) (µg/L) n/a n/a 2500-3900 3200 Bromide (µg/L) n/a n/a 130-360 238

UNTREATED WATER TEST RESULTS
Radiochemistry State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Gross Alpha (pCi/L) n/a 15 ND-4.5 3.0
Gross Beta (pCi/L) 0 50 ND-5.2 3.2

CITY OF ANTIOCH
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022 2022 ANNUAL WATER QUALITY REPORT
11 CITY OF MARTINEZ
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022

SOURCE OF WATER
The City of Martinez purchases untreated
water from CCWD, treats it in a City-owned
treatment plant and delivers it through the
City’s distribution pipes to customers who
are not served treated water directly from
CCWD.

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Chloride (mg/L) n/a 250 50-130 82
Copper (mg/L) n/a 1.0 ND-0.003 0.001
Odor-threshold (units) n/a 3 1-3 2
Specific conductivity (µmhos/cm) n/a 900 570 570
Sulfate (mg/L) n/a 250 55-64 60
T otal dissolved solids (mg/L) n/a 500 232-485 365
T urbidity (NTU) (distribution system) n/a 5 0.05-0.57 0.12

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Fluoride (mg/L) 1 2 0.6-0.9 0.8
Lead and Copper State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 57/0 8.2
EPA Copper Study (mg/L) 0.3 1.3 57/0 0.15
Date of Study 6/2021
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 [0.14] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 ND-13 ND
Chloramines as Cl2 (mg/L) 4 0.1-3.0 1.9
Haloacetic acids (µg/L) n/a 60 3.0-16 9.0
T otal T rihalomethanes (µg/L) n/a 80 25-60 43
2022 ANNUAL WATER QUALITY REPORT
12 PUBLIC MEETINGS
First and Third Wednesdays
7:00 p.m.
525 Henrietta Street
Martinez, CA 94553
925-372-2512
cityofmartinez.org
If you have any questions about the
City of Martinez tap water, please
call 925-372-3588.

CITY OF MARTINEZ
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 42-113 81
Bromide (mg/L) n/a n/a 0.1-0.4 0.2
Calcium (mg/L) n/a n/a 28-60 44
Hardness (mg/L) n/a n/a 42-144 108
Magnesium (mg/L) n/a n/a 14-55 35
pH n/a n/a 8.4-9.2 8.9
Potassium (mg/L) n/a n/a 3.3 3.3
Sodium (mg/L) n/a n/a 63 63
UCMR4 ASSESSMENT MONITORING
2018–2020
State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Manganese (µg/L) n/a 500 0.4-5.0 3.1
HAA5 (µg/L) n/a n/a 0.3-4.4 2.4
HAA Br (µg/L) n/a n/a 0.6-5.1 2.7
HAA9 (µg/L) n/a n/a 1.0-7.1 3.8
T otal Organic Carbon (TOC) (µg/L) n/a n/a 2800-4400 3667 Bromide (µg/L) n/a n/a 110-310 227

UNTREATED WATER TEST RESULTS
Radiochemistry State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Gross Alpha (pCi/L) n/a 15 ND-4.5 3.0
Gross Beta (pCi/L) 0 50 ND-5.2 3.2
2022 ANNUAL WATER QUALITY REPORT
13 CITY OF PITTSBURG
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022

SOURCE OF WATER
The City of Pittsburg purchases untreated
water from CCWD, treats it in a City-owned
treatment plant and delivers it to customers
through the City’s distribution pipes. In
addition to the water it buys from CCWD, the
City is able to pump water from two wells.

A source water assessment was conducted
for the Dover Well in September 2015, and
for Bodega Well in July 2009. In summary:
• Bodega well was found to be most
vulnerable to residential sewer collection
systems, abandoned military installation
(Camp Stoneman) and illegal activities
(drug labs).
• Dover well was considered most
vulnerable to sewer collection systems,
transportation corridors, and storm
drain discharge points. No contaminants
associated with the identified potentially
contaminating activities (PCA) have been
detected in water samples from Dover well.

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Aluminum (µg/L) n/a 200 ND-91 43
Chloride (mg/L) n/a 250 56-165 112
Odor-threshold (units) n/a 3 1.3 1.3
Specific conductivity (µmhos/cm) n/a 900 539-896 747
Sulfate (mg/L) n/a 250 58-94 79
T otal dissolved solids (mg/L) n/a 500 162-509 419
T urbidity (NTU) (distribution system) n/a 5 0.07-0.3 0.12

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Aluminum (mg/L) 0.6 1 ND-0.9 ND
Barium (mg/L) 2 1 0.1 n/a
Fluoride (mg/L) 1 2 0.5-0.9 0.7
Nitrate as N (mg/L) 10 10 0.4 n/a
Lead and Copper State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 53/0 ND
EPA Copper Study (mg/L) 0.3 1.3 53/0 ND
Date of Study 8/2021
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 [0.15] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Chlorite (mg/L) 0.05 1 ND-0.4 0.2
Chloramines as Cl2 (mg/L) 4 0.4-2.7 2.0
Haloacetic acids (µg/L) n/a 60 ND-7.0 4.0
T otal trihalomethanes (µg/L) n/a 80 12-98 48
2022 ANNUAL WATER QUALITY REPORT
14 PUBLIC MEETINGS
First and Third Mondays
7:00 p.m.
65 Civic Avenue
Pittsburg, CA 94565
925-252-4850
ci.pittsburg.ca.us
If you have any questions about the City
of Pittsburg tap water, please call 925-252-
6916.

CITY OF PITTSBURG
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 90-148 114
Ammonia (mg/L) n/a n/a ND-0.36 0.28
Calcium (mg/L) n/a n/a 47 n/a
Hardness (mg/L) n/a n/a 126-208 175
Magnesium (mg/L) n/a n/a 21 n/a
pH n/a n/a 7.3-8.8 8.5
Potassium (mg/L) n/a n/a 3.9 n/a
Sodium (mg/L) n/a n/a 76 n/a
UCMR4 ASSESSMENT MONITORING
2018–2020
State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Manganese (µg/L) n/a 500 3.2-5.3 3.9
HAA5 (µg/L) n/a n/a 1.7-8.6 5.4
HAA Br (µg/L) n/a n/a 1.0-16 8.4
HAA9 (µg/L) n/a n/a 2.7-20 12
T otal Organic Carbon (TOC) (µg/L) n/a n/a 2100-4200 2975 Bromide (µg/L) n/a n/a 45-260 115

UNTREATED WATER TEST RESULTS
Radiochemistry State or Federal
Goal
Highest Amt.

Allowed
Range
Detected Average
Uranium (pCi/L) 0.43 20 1.4 n/a
2022 ANNUAL WATER QUALITY REPORT
15 DIABLO WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022

SOURCE OF
WATER
Diablo Water District
purchases untreated
water from CCWD.

Water is treated
and blended with
groundwater pumped
from two wells.

The treated water
is then delivered to
customers through its
distributions pipes.

A source water
assessment was
conducted for the Glen
Park well in April 2005
and for Stonecreek
well in March 2011. In
summary:
• Both wells were
found to be most
vulnerable to historic
waste dumps/
landfills and septic
systems (high
density, >1/acre).

These activities are
not associated with
contaminants in the
water supply.

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Chloride (mg/L) n/a 250 53-130 85 48-128 74
Copper (mg/L) n/a 1.0 0.02 n/a 0.02 0.02
Manganese (µg/L) n/a 50 ND-410 32 ND n/a
Odor-threshold (units) n/a 3 2 n/a ND-1 ND
Specific conductivity (µmhos/cm) n/a 900 414-732 608 423-692 551 Sulfate (mg/L) n/a 250 55-110 83 58-96 78
T otal dissolved solids (mg/L) n/a 500 222-403 338 223-361 299 T urbidity (NTU) (distribution system) n/a 5 0.1-0.5 0.2 n/a n/a

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Barium (mg/L) 2 1 0.1 n/a 0.1 n/a
Fluoride (mg/L) 1 2 0.6-0.7 0.7 0.6-0.7 0.7
Nitrate as N (mg/L) 10 10 0.1-0.9 0.4 ND-0.5 0.2
Lead and Copper State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 29/0 1.9 n/a n/a
EPA Copper Study (mg/L) 0.3 1.3 29/0 0.24 n/a n/a
Date of Study 6/2022 n/a
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 n/a n/a [0.23] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 n/a n/a ND-13 ND
Chloramines as Cl2 (mg/L) 4 0.4-3.3 2.5 n/a n/a
Haloacetic acids (µg/L) n/a 60 4.0-9.7 7.0 n/a n/a
T otal T rihalomethanes (µg/L) n/a 80 7.1-30 19 n/a n/a 2022 ANNUAL WATER QUALITY REPORT
16 PUBLIC MEETINGS
Fourth Wednesday
6:30 p.m.
87 Carol Lane
Oakley, CA 94561
925-625-3798
diablowater.org
If you have any questions
about Diablo Water
District tap water, please
call 925-625-2112.

DIABLO WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2022

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*
UCMR4 ASSESSMENT MONITORING
2018–2020
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Manganese (µg/L) n/a 500 2.7-62 19 0.9-45 12
HAA5 (µg/L) n/a n/a 2.5-9.5 5.1 n/a n/a
HAA Br (µg/L) n/a n/a 3.1-14 6.1 n/a n/a
HAA9 (µg/L) n/a n/a 3.6-18 8.6 n/a n/a
T otal Organic Carbon (TOC) (µg/L) n/a n/a 2000-4400 3275 2000-4300 3000 Bromide (µg/L) n/a n/a 89-262 176 88-275 191

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

UNTREATED WATER TEST RESULTS
Radiochemistry State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Gross Alpha (pCi/L) n/a 15 ND-4.5 3.0 ND-4.5 3.0
Gross Beta (pCi/L) 0 50 ND-5.2 3.2 ND-5.2 3.2

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Alkalinity (mg/L) n/a n/a 42-131 89 40-102 67
Ammonia (mg/L) n/a n/a 0.6 n/a 0.6 n/a
Bromide (mg/L) n/a n/a 0.1-0.3 0.2 ND-0.2 0.2
Calcium (mg/L) n/a n/a 13-36 26 13-33 23
Hardness (mg/L) n/a n/a 68-164 126 70-142 110
Magnesium (mg/L) n/a n/a 9-15 15 9-15 13
pH n/a n/a 7.8-8.3 8.1 7.5-8.1 7.7
Potassium (mg/L) n/a n/a 2.2-4.0 2.9 2.2-4.0 2.9
Sodium (mg/L) n/a n/a 52-89 69 53-87 65
2022 ANNUAL WATER QUALITY REPORT
17 WANT MORE
INFORMATION?
Contra Costa Water District’s website
contains valuable information about
your water service. Visit ccwater.com
to begin your research.

This report contains important information about your drinking water. Have someone translate it for you, or speak with someone who understands it.

Su informe anual de la calidad del agua en español está disponible en línea en ccwater.com/awqr_es. Este informe contiene información importante sobre su agua potable.

Mahalaga ang impormasyong ito. Mangyaring ipasalin ito.

YOUR

DRINKING
WATER IN 2023

ANNUAL WATER QUALITY REPORT
In 2023, the drinking water delivered to your home met or exceeded every drinking water standard set by the state and federal governments. 230 GALLONS PER DAY:

OUR COMMUNITY IS #MADEWITHCCWD
All day and night, water is there supporting our health, fueling our businesses, and available to protect us from fire.

Across Central and Eastern Contra Costa County, the typical family depends on water in countless ways, using an average of 230 gallons per day. Its reliable availability—24/7—is a testament to the dedicated effort of Contra Costa Water District employees.

At CCWD, our team works around the clock to ensure you have water whenever you need it.

From treating water and improving the infrastructure that brings it to your tap, to responding to your calls and maintaining a vast network of pipes, pumps, and reservoirs—we’re there when you need us.

And all this reliable service costs about $3 per day. This isn’t just for the water itself but is an investment in the infrastructure and employees who ensure reliable water for today and tomorrow. We do this because our community is #MadeWithCCWD.

INVESTING IN TOMORROW, TODAY
Behind every turn of the tap is CCWD’s forward-thinking approach to water service. Through proactive infrastructure upgrades and innovative water management strategies, we’re not just maintaining the flow; we’re preparing for the future. Contributions made as part of your water bill help fuel these critical improvements, securing a reliable water supply for generations to come.

CCWD AT WORK: ENSURING YOUR WATER’S JOURNEY
Every gallon of water delivered to your home is the product of CCWD’s commitment to quality and reliability. Our team works tirelessly, ensuring the water that supports your life is there when you need it. Find out more about how we accomplish this goal at ccwater.com/ MadeWithCCWD

JOIN THE CONVERSATION
How does CCWD water play a role in your daily routine? From doing the laundry to enjoying a meal at your favorite local restaurant, share your stories on social media using the hashtag #MadeWithCCWD.
2023 ANNUAL WATER QUALITY REPORT
2 TO OUR CUSTOMERS:

We are pleased to present the Annual Water Quality Report that shows the high quality of your drinking water. As the water providers to more than 520,000 people, we take great effort and pride in delivering a product that exceeds all drinking water standards set by the state and federal governments. This report includes water quality data collected throughout 2023 and answers questions you might have about your tap water. For detailed test results, see pages 10-19.

CONTRA COSTA WATER DISTRICT
Erin Gomez | 925-688-8091

CITY OF ANTIOCH
Ivona Kagin | 925-779-7024

CITY OF MARTINEZ
Hiren Patel | 925-372-3588

CITY OF PITTSBURG
Ana Corti | 925-252-6916

DIABLO WATER DISTRICT
Nacho Mendoza | 925-625-2112

GOLDEN STATE WATER COMPANY
800-999-4033

CITY OF BRENTWOOD
James Wolfe | 925-516-6000
A rainbow appears
over CCWD’s Los
Vaqueros Reservoir in
March 2024. Los Vaqueros
Reservoir stores fresh water to
deliver to customers throughout
the year.
2023 ANNUAL WATER QUALITY REPORT
3 SAFETY STANDARDS

ENSURE QUALITY
The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.

CONTAMINANTS THAT MAY BE PRESENT

IN SOURCE WATER
Microbial contaminants include viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

Inorganic contaminants include salts and metals that can be naturally occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming.

Pesticides and herbicides may come from a variety of sources, such as agriculture, urban stormwater runoff and residential uses.

Radioactive contaminants can be naturally occurring or be the result of oil and gas production and mining activities.

In order to ensure that tap water is safe to drink, the U.S.

Your water providers regularly collect samples and run thousands of analyses each year to ensure high-quality water is available at customers’ taps. 2023 ANNUAL WATER QUALITY REPORT
4 WATER QUALITY NOTIFICATIONS

Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline at 1-800-426-4791 or at epa.gov/lead.

FLUORIDE
To prevent tooth decay, fluoride is added to your drinking water. This is a long-standing practice that has improved public health over many years. To read about fluoridation, visit waterboards.ca.gov/drinking_water/certlic/drinkingwater/Fluoridation.shtml.

CRYPTOSPORIDIUM
Cryptosporidium is a microbial pathogen found in surface water throughout the U.S. Although filtration removes Cryptosporidium, the most commonly-used filtration methods cannot guarantee 100 percent removal. Our monitoring indicates the presence of these organisms in our source water and/or finished water. Current test methods do not allow us to determine if the organisms are dead or if they are capable of causing disease. Ingestion of Cryptosporidium may cause cryptosporidiosis, an abdominal infection. Symptoms of infection include nausea, diarrhea, and abdominal cramps. Most healthy individuals can overcome the disease within a few weeks.

However, immuno-compromised people, infants and small children, and the elderly are at greater risk of developing life-threatening illness. We encourage immuno-compromised individuals to consult their doctor regarding appropriate precautions to take to avoid infection. Cryptosporidium must be ingested to cause disease, and it may be spread through means other than drinking water.

Contra Costa Water District recently replaced the beginning section of the Contra Costa Canal with a 10-foot diameter pipeline. This project improves public safety, water supply resiliency, and water quality.

PIPING THE CONTRA COSTA CANAL
In 2023, the Contra Costa Canal, which delivers nearly every drop of water by CCWD, received significant investments for its maintenance and improvement. Constructed in the 1930s and ‘40s, the Canal has been undergoing updates since 2009 due to challenges such as increased maintenance costs, potential contamination, weather vulnerabilities, and safety hazards.

These upgrades, called the Canal Replacement Project, aims to replace the initially unlined sections with a modern pipeline, enhancing both water quality and security. In 2023, we completed a new segment from East Cypress Road in Oakley to the Rock Slough intake, replacing it with a 10-foot diameter concrete pipeline, improving public safety and operational efficiency.

This project is part of a broader initiative to upgrade the remaining 22 miles of the Main Canal, ensuring the safe, efficient, and reliable delivery of water. Funded partly by water service rates, these upgrades are crucial for securing a dependable water source for future generations and maintaining public health.

Looking forward, Contra Costa Water District is committed to further modernizing our water infrastructure, with the recent project completion marking a significant advancement toward a fully modernized and secure water delivery system.
2023 ANNUAL WATER QUALITY REPORT
5 THE SOURCE OF YOUR WATER
Nearly every drop of water delivered by Contra Costa Water District originates in the Sacramento-San Joaquin River Delta. Though Delta water quality fluctuates throughout the year, investments made by your water provider ensure the water delivered to your tap is of consistent high quality. Contra Costa Water District diverts water from four locations in the Delta and adjusts its operations to divert where water quality is best. Additionally, the Los Vaqueros Reservoir helps protect against the impacts of the highly variable water quality and supply from the Delta.

The assessments were based on a review of data collected from 1996 through 2001, as well as a review of the activities and facilities located at or near each source. In summary:
• Intakes were found to be most vulnerable to the effects of saltwater intrusion, agricultural drainage, recreational boating and regulated point discharges.
• Reservoirs were found to be most vulnerable to the effects of associated recreation, roads and parking lots, and watershed runoff.
• Contra Costa Canal was found to be most vulnerable to gas stations, chemical/petroleum processing/storage, septic systems, historic landfills and military institutions.

THE DEL TA
HONKER
BA Y
CGSWCG

PITT SBUR G

A NTI OC H

DIABL O

WA TER DI STRI CT

BRENT W OO D

MA RTINE Z
CC WD

T REA TED WATER

SERVI CE AREA

CLIFT ON
COURT

FOREB AY
LO S

VA QUEROS

RESERVOIR

ANTIOCHANTIOCH

RESERVOIRRESERVOIR

ANTIOCH

R ESERVOIR

CONTR ACONTR A

LOMALOMA

RESERVOIRRESERVOIR

CONTR A
LOMA

R ESERVOIR

MALLARDMALLARD

R ESERVOIRRESERVOIR

SUISUN BA Y

SACRAMENT O R IVER

SAN J O AQUIN RIVER

MALLARD

R ESERVOIR
MIDDLE
RIVER
INTAKE

OLD RIVER
INTAKE
ROCK
SLOUGH
INTAKE

MALLARD

SLOUGH INTAKE
Ralph D. BollmanRalph D. Bollman
WTPWTP
Ralph D. Bollman
WTP
Concord
Port
Costa
Clyde
Pleasant
Hill
Clayton
Port
Chicago
Avon
Oakley
Discovery
Bay
Pacheco
Walnut Creek
Randall-Bold
WTP

CCWD-EBMUDCCWD-EBMUD
Intertie Intertie

CCWD-EBMUD
Intertie
CCWD
Transfer
Facility
CCWD/
City of Brentwood
WTP
District
Center

MART INEZ

R ESERVOIR
680
680
680
680
780
4 4
4 4
160
160
4 4
J4
24 242
4 Contra Costa Water District Boundary
Contra Costa Canal
Multi-Purpose Pipeline
Los Vaqueros Pipeline
Shortcut Pipeline
2023 ANNUAL WATER QUALITY REPORT
6 WATER SERVICE LINE INVENTORY
To ensure the safety and quality of drinking water within our community, your water providers have proactively
taken measures against the presence of lead in service lines.

Recognizing the potential health hazards associated with lead, your water providers completed a comprehensive water service line inventory in 2019, focusing on the utility-owned segment of the water service lines. This initiative successfully confirmed the absence of lead service lines within the sections of the infrastructure owned by your water provider.

Our ongoing commitment extends to the latest requirements set forth by the U.S. Environmental Protection Agency, which mandates water systems to conduct a water service line inventory on both the customer-owned and utility-owned portions of service lines by October 16, 2024. The primary goal of this inventory is to identify and eliminate any lead pipes within the water distribution system, ensuring the continued delivery of high-quality drinking water to our customers.

To achieve this, your water providers are undertaking detailed surveys from the water meter box to the building inlet. This process involves using hand tools to excavate around the water meter box, employing magnets and conducting scratch tests to determine the pipe material, and documenting the findings.

This approach ensures that your water providers remain at the forefront of safeguarding public health, reinforcing our promise of providing safe, clean, and reliable water “Today and Tomorrow. ” Read more about this water service line inventory online at ccwater.com/196

W A TER

SERVICE LINE

INVENT OR Y

W A TER

PIPELINE W A TER

SERVICE LINEW A TER
METER

CONTR A COST A
W A TER DISTRIC T’S

PL UMBING

PR OPER TY
O WNER’S

PL UMBING

GOOSENECK/

PIG TAIL

HOSE BIB

LEARN MORE ABOUT
CCWD WATER QUALITY HOTLINE:
925-688-8156
CCWD WATER QUALITY INFORMATION:
ccwater.com/WaterQuality
TROUBLESHOOT WATER AT YOUR TAP:
ccwater.com/364
CCWD WATER EFFICIENCY:
925-688-8320

US EPA REVISED LEAD AND COPPER RULE
https://www.epa.gov/ground-water-and-drinking-
water/revised-lead-and-copper-rule

STATE WATER BOARDS LEAD AND COPPER RULE

FOR DRINKING WATER
https://www.waterboards.ca.gov/drinking_water/
certlic/drinkingwater/leadandcopperrule.html
2023 ANNUAL WATER QUALITY REPORT
7 DEFINITIONS & ABBREVIATIONS
Action Level (AL) – The concentration of
a contaminant which, if exceeded, triggers
treatment or other requirements which a water
system must follow
Maximum Contaminant Level (MCL) – The
highest level of a contaminant that is allowed
in drinking water. Primary MCLs are set as close
to the PHGs (or MCLGs) as is economically or
technologically feasible
Maximum Contaminant Level Goal (MCLG) –
The level of a contaminant in drinking water
below which there is no known or expected risk to
health. MCLGs are set by the U.S. Environmental
Protection Agency
Maximum Residual Disinfectant Level (MRDL) –
The highest level of a disinfectant allowed in
drinking water. There is convincing evidence that
the addition of a disinfectant is necessary for
control of microbial contaminants
Maximum Residual Disinfectant Level
Goal (MRDLG) – The level of a drinking water
disinfectant below which there is no known or
expected risk to health. MRDLGs do not reflect
the benefits of the use of disinfectants to control
microbial contaminants
mg/L – Milligrams per liter
n/a – Not analyzed or not applicable (when used in
average column, only one data point is available)
ND – Not detected at or above the reporting level
ng/L – Nanograms per liter
NTU – Nephelometric turbidity units
Primary Drinking Water Standards – MCLs
and MRDLs for contaminants that affect health
along with their monitoring and reporting
requirements, and water treatment requirements
pCi/L – Picocuries per liter (a measure of
radioactivity)
Public Health Goal (PHG) – The level of a
contaminant in drinking water below which there
is no known or expected risk to health. PHGs are
set by the California Environmental Protection
Agency Office of Health and Hazard Assessment
RAA – Running Annual Average
Secondary Drinking Water Standards –
Secondary MCLs are set for contaminants that
affect the odor, taste or appearance of water
Treatment Technique (TT) – A required process
intended to reduce the level of a contaminant in
drinking water
µg/L – Micrograms per liter
µmhos/cm– micromhos per centimeter
(a measure of conductivity)

Constituents may vary from provider to provider depending on water source and treatment techniques. Please see ccwater.com/awqr_cm for a full list of contaminants monitored.

WHAT’S NEW
This year, your water providers monitored for the Fifth Unregulated Contaminant Monitoring Rule (UCMR5). This regulation is part of the Safe Drinking Water Act, which requires the U.S. Environmental Protection Agency to identify up to 30 contaminants every five years for public water systems to monitor. The results help the EPA decide whether these contaminants should have a health-based standard. Water systems have three years to complete this monitoring. Find more information about the Unregulated Contaminant Monitoring Rule at ccwater.com/ucmr.

Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals widely used in consumer products. To learn more about PFAS and drinking water, visit ccwater.com/422.

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or Federal
Goal
Highest Amt.

Allowed Range Detected Average
Fluoride (mg/L) 1 2 0.6-0.8 0.7

UNITS EQUIVALENCE
mg/L (milligrams per liter)
ppm (parts per million)
µg/L (micrograms per liter)
ppb (parts per billion)
1 second in 11.5 days
1 second in nearly 32 years
1 2 3
2023 ANNUAL WATER QUALITY REPORT
8 The list below shows common sources for chemicals or constituents that may have been detected in your water. Consult the tables on the following pages to see what was detected in your drinking water.

COMMON SOURCES OF CHEMICALS OR CONSTITUENTS

Total Dissolved Solids Runoff/leaching from natural deposits Total Trihalomethanes Byproduct of drinking water disinfection Turbidity Soil runoff
2023 ANNUAL WATER QUALITY REPORT
9 * Randall-Bold Water Treatment Plant is a regular source of water for CCWD, Diablo Water District and the Golden State Water Company in Bay Point. It is also an as-needed source of water for Antioch and Brentwood and an
emergency source for Pittsburg.

PUBLIC MEETINGS
First and Third Wednesday
6:30 p.m.
1331 Concord Avenue
Concord, CA 94520
925-688-8000
ccwater.com
7 CCWD RANDALL-BOLD
WTP*

CCWD-BRENTWOOD
WTP

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or Federal
Goal
Highest Amt.

Allowed Range Detected Average Range Detected Average Range Detected Average Fluoride (mg/L) 1 2.0 0.6-0.9 0.7 0.7-0.8 0.7 n/a n/a
Nitrate as N (mg/L) 10 10 ND-1.0 0.3 ND-3.8 0.8 ND-1.4 0.4 Lead and Copper Study State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
# of Sites
T ested/
# Exceeding AL
90% Percentile
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 67/0 ND n/a n/a n/a n/a
EPA Copper Study (mg/L) 0.3 1.3 67/0 0.2 n/a n/a n/a n/a Date of Study – – 6/2022 n/a n/a
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (treatment plant) n/a 95% 0.3 [0.23] [100%] [0.10] [100%] [0.11] [100%] Disinfectant/Disinfection
Byproducts
State or Federal
Goal
Highest Amt.

Allowed Range Detected Highest
Quarterly RAA Range Detected Highest
Quarterly RAA Range Detected Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 ND-12 ND ND-12 ND ND ND
Chloramines as Cl2 (mg/L) 4 4.0 ND-3.5 1.8 n/a n/a n/a n/a Haloacetic acids (µg/L) n/a 60 3.2-20 22 n/a n/a n/a n/a T otal T rihalomethanes (µg/L) n/a 80 8.5-40 32 n/a n/a n/a n/a If you have any questions about Contra
Costa Water District tap water, please call
925-688-8091.

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023 2023 ANNUAL WATER QUALITY REPORT
10 CCWD RANDALL-BOLD
WTP*

CCWD-BRENTWOOD
WTP

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average Range
Detected Average
Alkalinity (mg/L) n/a n/a 39-67 51 27-61 46 27-60 50
Ammonia (mg/L) n/a n/a 0.6 n/a 0.7 n/a 0.5 n/a
Bromide (mg/L) n/a n/a ND-0.1 0.01 ND-0.1 0.03 ND-0.2 0.02 Calcium (mg/L) n/a n/a 11-22 16 6.6-31 15 6.8-20 14
Hardness (mg/L) n/a n/a 47-101 72 26-140 69 26-108 66
Magnesium (mg/L) n/a n/a 5.2-12 8.2 2.6-15 7.8 2.6-15 7.8 pH n/a n/a 8.1-8.9 8.5 7.4-9.0 8.5 8.2-9.0 8.7
Potassium (mg/L) n/a n/a 1.6-3.1 2.2 1.0-4.7 2 1.1-4.7 2.1 Sodium (mg/L) n/a n/a 26-56 43 17-63 37 17-87 38

CCWD RANDALL-BOLD
WTP*

CCWD-BRENTWOOD
WTP

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or Federal
Goal
Highest Amt.

Allowed Range Detected Average Range Detected Average Range Detected Average Chloride (mg/L) n/a 250 20-61 40 11-80 35 12-121 39
Color (units) n/a 15 2.0 n/a 2.0 n/a 2.0 n/a
Copper (mg/L) n/a 1.0 0.02 n/a ND n/a ND n/a
Specific Conductivity (µmhos/cm) n/a 900 232-469 362 139-623 328 140-697 330 Sulfate (mg/L) n/a 250 36-78 55 20-111 50 21-87 45
T otal Dissolved Solids (mg/L) n/a 500 125-255 197 76-347 178 77-361 178 T urbidity (NTU) (distribution system) n/a 5 0.07-0.54 0.25 n/a n/a n/a n/a

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023 2023 ANNUAL WATER QUALITY REPORT
11 PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Fluoride (mg/L) 1 2.0 0.6-0.9 0.8
Lead and Copper Study State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 50/0 ND
EPA Copper Study (mg/L) 0.3 1.3 50/0 0.08
Date of Study – – 9/2021
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T otal Coliform (State T otal Coliform Rule) n/a 5% of mo.

Samples 0%-0.8% 0.1%
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 [0.26] [99.85%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Chloramines as CI2 (mg/L) 4 4.0 0.4-4.0 2.8
Haloacetic acids (µg/L) n/a 60 6.0-8.0 7.3
T otal trihalomethanes (µg/L) n/a 80 26-44 39

SOURCE OF WATER
The City of Antioch purchases untreated water
from CCWD, treats it in a City-owned treatment
plant and delivers it to customers through the
City’s distribution pipes. The City is also able
to pump directly from the San Joaquin River or
purchase treated water from CCWD, which was
the case in 2023. Only a small percentage of
customers received drinking water from CCWD.

The City completes watershed sanitary surveys
every five years. The last survey, completed in
2022, concluded that potential contamination
is regularly mitigated by the natural flushing of
the Delta, controls at contamination sources
and existing water treatment practices.

In April 2003, Antioch conducted a source water
assessment. In summary:
• Antioch Municipal Reservoir was found
to be most vulnerable to sewer collection
systems; this activity is not associated with
contaminants in the water supply.
• San Joaquin River was found to be most
vulnerable to the effects of saltwater
intrusion, chemical/petroleum processing or
storage, and regulated point discharges.

Water from the San Joaquin River can be affected by saltwater intrusion. When chloride levels in the river exceed 250 milligrams per liter, the City stops pumping until chloride levels decrease.

CITY OF ANTIOCH
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023 2023 ANNUAL WATER QUALITY REPORT
12 GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 30-82 58
Calcium (mg/L) n/a n/a 6-26 14
Hardness (mg/L) n/a n/a 30-108 62
Magnesium (mg/L) n/a n/a 4.8-8.4 6.6
pH n/a n/a 8.0-10.7 8.6
Potassium (mg/L) n/a n/a 1.6-2.4 2.0
Sodium (mg/L) n/a n/a 34-48 41

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Chloride (mg/L) n/a 250 30-61 46
Copper (mg/L) n/a 1.0 .003-.006 0.004
Specific conductivity (µmhos/cm) n/a 900 280-420 350
Sulfate (mg/L) n/a 250 34-39 37
T otal dissolved solids (mg/L) n/a 500 170-230 200
T urbidity (NTU) (distribution system) n/a 5 0.04-0.4 0.1

CITY OF ANTIOCH
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023 2023 ANNUAL WATER QUALITY REPORT
13 CITY OF MARTINEZ
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023

SOURCE OF WATER
The City of Martinez purchases untreated
water from CCWD, treats it in a City-owned
treatment plant and delivers it through the
City’s distribution pipes to customers who
are not served treated water directly from
CCWD.

The City of Martinez detected E. coli in
one of its samples this year. This was one
single detection, which did not result
in an MCL violation because all of the
required repeated sampling confirmed
that the system is in compliance with the
microbiological standards.

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Asbestos (MFL) 7 7 ND-0.2 ND
Fluoride (mg/L) 1 2.0 0.6-1.0 0.7
Nitrate as N (mg/L) 10 10 ND-1.2 0.7
Lead and Copper Study State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 64/0 ND
EPA Copper Study (mg/L) 0.3 1.3 64/0 0.17
Date of Study – – 8/2023
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 [0.15] [100%] T otal Coliform
(Revised T otal Coliform Rule) n/a 5% of mo.

Samples 0-2.0% 0.2%
State or Federal
Goal
Highest Amt.

Allowed
T otal
Detections
Months in
Violation
E. Coli 0 0 1 0
Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 ND-6 ND
Chloramines as Cl2 (mg/L) 4 4.0 ND-4.2 1.7
Haloacetic acids (µg/L) n/a 60 ND-6.0 8.0
T otal T rihalomethanes (µg/L) n/a 80 11-24 28
2023 ANNUAL WATER QUALITY REPORT
14 PUBLIC MEETINGS
First and Third Wednesdays
7:00 p.m.
525 Henrietta Street
Martinez, CA 94553
925-372-2512
cityofmartinez.org
If you have any questions about the
City of Martinez tap water, please
call 925-372-3588.

CITY OF MARTINEZ
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 20-95 55
Bromide (mg/L) n/a n/a ND-0.2 0.1
Calcium (mg/L) n/a n/a 11.0-21.0 16
Hardness (mg/L) n/a n/a 22-128 72
Magnesium (mg/L) n/a n/a 5.4-12 9.0
pH n/a n/a 7.8-9.3 8.9
Potassium (mg/L) n/a n/a 1.4-3.9 2.7
Sodium (mg/L) n/a n/a 36-67 52

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Chloride (mg/L) n/a 250 16-125 48
Copper (mg/L) n/a 1.0 ND-0.003 0.001
Odor-threshold (units) n/a 3 ND-4 2
Specific conductivity (µmhos/cm) n/a 900 300-540 420
Sulfate (mg/L) n/a 250 30-73 52
T otal dissolved solids (mg/L) n/a 500 170-465 260
T urbidity (NTU) (distribution system) n/a 5 0.05-0.29 0.12 2023 ANNUAL WATER QUALITY REPORT
15 CITY OF PITTSBURG
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023

A source water assessment was conducted
for the Dover Well in September 2015, and
for Bodega Well in July 2009. In summary:
• Bodega well was found to be most
vulnerable to residential sewer collection
systems, abandoned military installation
(Camp Stoneman) and illegal activities
(drug labs).
• Dover well was considered most
vulnerable to sewer collection systems,
transportation corridors, and storm
drain discharge points. No contaminants
associated with the identified potentially
contaminating activities (PCA) have been
detected in water samples from Dover well.

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Fluoride (mg/L) 1 2.0 0.6-0.9 0.7
Nitrate as N (mg/L) 10 10 0.4 n/a
Lead and Copper Study State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 [0.24] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Chlorite (mg/L) 0.05 0.05 0.1-0.7 0.3
Chloramines as Cl2 (mg/L) 4 4.0 0.1-2.8 1.4
Haloacetic acids (µg/L) n/a 60 1.0-19 11
T otal trihalomethanes (µg/L) n/a 80 43-79 62
2023 ANNUAL WATER QUALITY REPORT
16 PUBLIC MEETINGS
First and Third Mondays
7:00 p.m.
65 Civic Avenue
Pittsburg, CA 94565
925-252-4850
ci.pittsburg.ca.us
If you have any questions about the City
of Pittsburg tap water, please call 925-252-
6916.

CITY OF PITTSBURG
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Alkalinity (mg/L) n/a n/a 46-120 90
Ammonia (mg/L) n/a n/a ND-0.5 0.3
Calcium (mg/L) n/a n/a 24 n/a
Hardness (mg/L) n/a n/a 52-232 156
Magnesium (mg/L) n/a n/a 12 n/a
pH n/a n/a 7.2-9.2 8.5
Potassium (mg/L) n/a n/a 2.1 n/a
Sodium (mg/L) n/a n/a 45 n/a
UCMR5 ASSESSMENT MONITORING
(2023-2025)
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Lithium (µg/L) n/a n/a ND-23 11.5

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average
Aluminum (µg/L) n/a 200 ND-53 13
Chloride (mg/L) n/a 250 27-147 86
Specific Conductivity (µmhos/cm) n/a 900 144-931 627
Sulfate (mg/L) n/a 250 54-110 90
T otal Dissolved Solids (mg/L) n/a 500 124-559 362
T urbidity (NTU) (distribution system) n/a 5 0.05-0.29 0.16 2023 ANNUAL WATER QUALITY REPORT
17 DIABLO WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023

SOURCE OF
WATER
Diablo Water District
purchases untreated
water from CCWD.

Water is treated
and blended with
groundwater pumped
from two wells.

The treated water
is then delivered to
customers through its
distribution pipes.

A source water
assessment was
conducted for the Glen
Park well in April 2005
and for Stonecreek
well in March 2011. In
summary:
• Both wells were
found to be most
vulnerable to historic
waste dumps/
landfills and septic
systems (high
density, >1/acre).

These activities are
not associated with
contaminants in the
water supply.

DIABLO WATER
DISTRICT RANDALL-BOLD WTP*

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Chloride (mg/L) n/a 250 11-98 46 11-80 35
Color (units) n/a 15 2.0 n/a 2.0 n/a
Manganese (ug/L) n/a 50 ND-520 101 n/a n/a
Specific Conductivity (µmhos/cm) n/a 900 167-698 460 139-623 328 Sulfate (mg/L) n/a 250 24-110 67 20-111 50
T otal Dissolved Solids (mg/L) n/a 500 90-390 249 76-347 178 T urbidity (NTU) (distribution system) n/a 5 0.09-0.67 0.23 n/a n/a

DIABLO WATER
DISTRICT RANDALL-BOLD WTP*

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Fluoride (mg/L) 1 2.0 0.6-0.8 0.7 0.7-0.8 0.7
Nitrate as N (mg/L) 10 10 0.2-2.8 0.8 ND-3.8 0.8
Lead and Copper Study State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T otal Coliform (Revised T otal Coliform Rule) n/a 5% of mo.

Samples 0%-1.8% 0.2% n/a n/a
T urbidity (NTU) (treatment plant) n/a 95% ≤ 0.3 n/a n/a [0.10] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Range
Detected
Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 n/a n/a ND-12 ND
Chloramines as Cl2 (mg/L) 4 4.0 ND-3.5 2.5 n/a n/a
Haloacetic acids (µg/L) n/a 60 9.6-19 22 n/a n/a
T otal T rihalomethanes (µg/L) n/a 80 2.6-14 8.0 n/a n/a 2023 ANNUAL WATER QUALITY REPORT
18 PUBLIC MEETINGS
Fourth Wednesday
6:30 p.m.
87 Carol Lane
Oakley, CA 94561
925-625-3798
diablowater.org
If you have any questions
about Diablo Water
District tap water, please
call 925-625-2112.

DIABLO WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2023

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*
UCMR5 ASSESSMENT MONITORING
2023–2025
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Lithium (µg/L) n/a n/a ND-15 10 n/a n/a

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Alkalinity (mg/L) n/a n/a 34-104 69 27-61 46
Ammonia (mg/L) n/a n/a 0.6 n/a 0.7 n/a
Bromide (mg/L) n/a n/a ND-0.2 0.09 ND-0.1 0.03
Calcium (mg/L) n/a n/a 7.9-33 23 6.6-31 15
Hardness (mg/L) n/a n/a 36-152 104 26-140 69
Magnesium (mg/L) n/a n/a 3.2-17 12 2.6-15 7.8
pH n/a n/a 7.7-8.9 8.3 7.4-9.0 8.5
Potassium (mg/L) n/a n/a 1.3-4.4 2.2 1.0-4.7 2
Sodium (mg/L) n/a n/a 20-74 50 17-63 37
2023 ANNUAL WATER QUALITY REPORT
19 WANT MORE
INFORMATION?
Contra Costa Water District’s website
contains valuable information about
your water service. Visit ccwater.com
to begin your research.

This report contains important information about your drinking water. Have someone translate it for you, or speak with someone who understands it.

Su informe anual de la calidad del agua en español está disponible en línea en ccwater.com/awqr_es. Este informe contiene información importante sobre su agua potable.

Mahalaga ang impormasyong ito. Mangyaring ipasalin ito.

YOUR

DRINKING
WATER IN 2024

ANNUAL WATER QUALITY REPORT
In 2024, the drinking water delivered to your home met or exceeded every drinking water standard set by the state and federal governments.

A PUBLICATION OF THE CONTRA COSTA WATER DISTRICT | CCWATER.COM

CANAL QUICK
FACTS

FIRST OPERATIONAL
194
0 ORIGINALLY BUILT BY

S. Bureau of Reclamation

TOTAL LENGTH
48 miles

WATER SOURCE
Sa
cramento-San Joaquin Delta
For more than 80 years, the Contra Costa Canal has been the backbone of our region’s water system, delivering safe, reliable water to homes and businesses.

Built in 1940, this critical infrastructure transformed the region, making it possible for communities to grow and thrive.

Every time you turn on the faucet, you’re tapping into a remarkable legacy—a system designed by past generations to secure water for the future. Today, the canal serves more than 520,000 people, ensuring clean water is always available.

The Contra Costa Canal transports water from our Delta intakes and Los Vaqueros Reservoir to cities, businesses, treatment plants, and individual users. The canal supports public health, firefighting, the local economy, and many of life’s conveniences.

But like all aging infrastructure, the canal faces modern challenges. The aging concrete liner requires increasing maintenance and has made upkeep more complex. Urban growth has increased safety risks. Extreme weather events, from storms to landslides, fill the canal with debris, requiring constant clearing.

Contra Costa Water District (CCWD) teams work around the clock to patrol, maintain, and safeguard this vital system ensuring your water remains secure and reliable. But maintenance is not enough. That’s why CCWD is taking steps to protect our water future by upgrading the most critical section of the canal with a buried pipeline that spans from Oakley to north Concord.

With planning already underway, CCWD is serving today while planning for tomorrow so that future generations will continue to benefit from this remarkable legacy.

CANAL HISTORY
1937 Construction begins
1940 First canal delivery is
m
ade to City of Pittsburg
1948 Entire 48-mile canal, from Rock Slough to
M
artinez, is completed
1972 CCWD takes over operations and maintenance of canal 2009 CCWD begins replacing first 4 miles of canal with buried pipeline 2010 CCWD customers fully repay federal government for canal system 2019 Act of Congress initiates transfer of canal ownership from the federal government to CCWD

SERVING TODAY,

PLANNING FOR TOMORROW
WATCH: SERVING TODAY, PLANNING FOR TOMORROW
Learn more about the canal at ccwater.com/Canal
2024 ANNUAL WATER QUALITY REPORT
2 TO OUR CUSTOMERS:

We are pleased to present the Annual Water Quality Report that shows the high quality of your drinking water. As the water providers to more than 520,000 people, we take great effort and pride in delivering a product that exceeds all drinking water standards set by the state and federal governments. This report includes water quality data collected throughout 2024 and answers questions you might have about your tap water. For detailed test results, see pages 10-19.

CONTRA COSTA WATER DISTRICT
Erin Gomez | 925-688-8091

CITY OF ANTIOCH
Ivona Kagin | 925-779-7024

CITY OF MARTINEZ
Hiren Patel | 925-372-3588

CITY OF PITTSBURG
Ana Corti | 925-252-6916

DIABLO WATER DISTRICT
Nacho Mendoza | 925-625-2112

GOLDEN STATE WATER COMPANY
800-999-4033

CITY OF BRENTWOOD
James Wolfe | 925-516-6000
Los Vaqueros
Reservoir, nestled in
the rolling hill south of
Brentwood, stores as much
as 52 billion gallons of water
to ensure fresh water throughout
the year.

A PUBLICATION OF THE CONTRA COSTA WATER DISTRICT | CCWATER.COM 2024 ANNUAL WATER QUALITY REPORT
3 SAFETY STANDARDS

CONTAMINANTS THAT MAY BE PRESENT

IN SOURCE WATER
Microbial contaminants include viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

Pesticides and herbicides may come from a variety of sources, such as agriculture, urban stormwater runoff and residential uses.

Radioactive contaminants can be naturally occurring or be the result of oil and gas production and mining activities.

In order to ensure that tap water is safe to drink, the U.S.

Environmental Protection Agency (US EPA) and the State Water Resources Control Board (State Board) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. U.S. Food and Drug Administration regulations and California law also establish limits for contaminants in bottled water that provide the same protection for public health.

Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants.

The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the US EPA’s Safe Drinking Water Hotline (1-800-426-4791).

Your water providers regularly collect samples and run thousands of analyses each year to ensure high-quality water is available at customers’ taps. 2024 ANNUAL WATER QUALITY REPORT
4 WATER QUALITY NOTIFICATIONS

LEAD IN DRINKING WATER
Lead can cause serious health effects in people of all ages, especially pregnant people, infants (both formula-fed and breastfed), and young children. Lead in drinking water is primarily from materials and parts used in service lines and in home plumbing. Your drinking water provider is responsible for providing high quality drinking water and removing lead pipes but cannot control the variety of materials used in the plumbing in your home. Because lead levels may vary over time, lead exposure is possible even when your tap sampling results do not detect lead at one point in time. You can help protect yourself and your family by identifying and removing lead materials within your home plumbing and taking steps to reduce your family’s risk. Using a filter, certified by an American National Standards Institute accredited certifier to reduce lead, is effective in reducing lead exposures. Follow the instructions provided with the filter to ensure the filter is used properly. Use only cold water for drinking, cooking, and making baby formula.

Boiling water does not remove lead from water. Before using tap water for drinking, cooking, or making baby formula, flush your pipes for several minutes. You can do this by running your tap, taking a shower, doing laundry or a load of dishes. If you have a lead service line or galvanized requiring replacement service line, you may need to flush your pipes for a longer period. If you are concerned about lead in your water and wish to have your water tested, contact your drinking water provider using the information provided on Page 3 of this report. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available at epa.gov/safewater/lead.

LEAD SERVICE LINE INVENTORY
Your water providers are committed to delivering safe, high- quality water. Inventories of water service lines, as required by federal regulations, were conducted to help identify and reduce potential sources of lead in drinking water. No lead service lines were detected in our systems.

You can find statements confirming that no lead was detected in the distribution systems at the links below:

CCWD: https://www.ccwater.com/196/Water-Service-Line-
Inventory
Antioch: https://www.antiochca.gov/fc/public-works/Lead- Service-Statement.pdf
Brentwood: https://www.brentwoodca.gov/government/
public-works/water/reference-information
Martinez: https://www.cityofmartinez.org/departments/
water-system/water-service-line-inventory
Pittsburg: https://www.pittsburgca.gov/services/pittsburg- water/distribution-system
DWD: https://www.diablowater.org/doc/8020/
GSWC: https://www.gswater.com/service-material-inventory

FLUORIDE
To prevent tooth decay, fluoride is added to your drinking water. This is a long-standing practice that has improved public health over many years. Since the passage of AB 733 in 1995, public water systems with more than 10,000 connections must fluoridate if funding is available to cover the costs. To read about fluoridation, visit waterboards.ca.gov/drinking_water/certlic/ drinkingwater/Fluoridation.shtml.

VULNERABLE POPULATIONS
Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised
persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. U.S. EPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (1-800-426-4791).

CRYPTOSPORIDIUM
Cryptosporidium is a microbial pathogen found in surface water throughout the U.S. Although filtration removes
Cryptosporidium, the most commonly-used filtration methods cannot guarantee 100 percent removal. Our monitoring
indicates the presence of these organisms in our source water and/or finished water. Current test methods do not allow us to determine if the organisms are dead or if they are capable of causing disease. Ingestion of Cryptosporidium may cause cryptosporidiosis, an abdominal infection. Symptoms of
infection include nausea, diarrhea, and abdominal cramps.

Most healthy individuals can overcome the disease within a few weeks. However, immuno-compromised people, infants and
small children, and the elderly are at greater risk of developing life-threatening illness. We encourage immuno-compromised individuals to consult their doctor regarding appropriate precautions to take to avoid infection. Cryptosporidium must be ingested to cause disease, and it may be spread through means other than drinking water.

LEARN MORE ABOUT
CCWD WATER QUALITY HOTLINE:
925-688-8156
CCWD WATER QUALITY INFORMATION:
ccwater.com/WaterQuality
TROUBLESHOOT WATER AT YOUR TAP:
ccwater.com/364
2024 ANNUAL WATER QUALITY REPORT
5 THE SOURCE OF YOUR WATER
Nearly every drop of water delivered by CCWD originates in the Sacramento-San Joaquin River Delta. Though Delta water quality fluctuates throughout the year, investments made by your water provider ensure the water delivered to your tap is of consistent high quality. CCWD diverts water from four locations in the Delta and adjusts its operations to divert where water quality is best.

Additionally, the Los Vaqueros Reservoir helps protect against the impacts of the highly variable water quality and supply from the Delta.

The assessments were based on a review of data collected from 1996 through 2001, as well as a review of the activities and facilities located at or near each source. In summary:
•
Intak
es were found to be most vulnerable to the effects of
saltwater intrusion, agricultural drainage, recreational boating and regulated point discharges.
• Reser
voirs were found to be most vulnerable to the effects of associated recreation, roads and parking lots, and watershed runoff.
•
Contra Co
sta Canal was found to be most vulnerable to gas
stations, chemical/petroleum processing/storage, septic systems, historic landfills and military institutions.

THE DEL TA
HONKER
BA Y
CGSWCG

PITT SBUR G

A NTI OC H

DIABL O

WA TER DI STRI CT

BRENT W OO D

MA RTINE Z
CC WD

T REATED WATER

SERVI CE AREA

CLIFTON
COURT

FOREB AY
LO S

VA QUEROS

RESERVOIR

ANTIOCHANTIOCH

RESERVOIRRESERVOIR

ANTIOCH

R ESERVOIR

CONTR ACONTR A

LOMALOMA

RESERVOIRRESERVOIR

CONTR A
LOMA

R ESERVOIR

MALLARDMALLARD

R ESERVOIRRESERVOIR

SUISUN BA Y

SACRAMENT O R IVER

SAN J O AQUIN RIVER

MALLARD

R ESERVOIR
MIDDLE
RIVER
INTAKE

OLD RIVER
INTAKE
ROCK
SLOUGH
INTAKE

MALLARD

SLOUGH INTAKE
Ralph D. BollmanRalph D. Bollman
WTPWTP
Ralph D. Bollman
WTP
Concord
Port
Costa
Clyde
Pleasant
Hill
Clayton
Port
Chicago
Avon
Oakley
Discovery
Bay
Pacheco
Walnut Creek
Randall-Bold
WTP

CCWD-EBMUDCCWD-EBMUD
Intertie Intertie

CCWD-EBMUD
Intertie
CCWD
Transfer
Facility
CCWD/
City of Brentwood
WTP
District
Center

MART INEZ

R ESERVOIR
680
680
680
680
780
4 4
4 4
160
160
4 4
J4
24 242
4 Contra Costa Water District Boundary
Contra Costa Canal
Multi-Purpose Pipeline
Los Vaqueros Pipeline
Shortcut Pipeline
2024 ANNUAL WATER QUALITY REPORT
6 TRANSITION TO SAFER WATER TREATMENT
When it opened it 1992, the Randall-Bold Water Treatment Plant in Oakley was surrounded by open space and undeveloped
properties. Over the years, as the surrounding community grew and homes, schools, and businesses were built nearby, CCWD has remained committed to ensuring the safety of both the water treatment process and the people who live and work in the area.

Randall-Bold, which is jointly owned by CCWD and Diablo Water District, regularly provides high-quality treated water to both agencies, as well as Golden State Water Company in Bay Point. It also serves as an as-needed water source for the cities of Antioch and Brentwood, and provides an emergency water supply for Pittsburg. This regional role makes maintaining safe, reliable operations at the plant even more critical.

In late 2024, CCWD began work to replace two chemicals critical to the treatment process with safer alternatives. These changes allow the same high level of treatment while improving operational safety for both employees and the surrounding community. •
Chlorine Gas to Sodium Hypochlorit e
Chlorine gas has long been an industry standard for disinfection, but it requires strict handling procedures and specialized storage due to its highly reactive nature. It is being replaced with sodium hypochlorite, a liquid disinfectant that is just as effective but far safer to transport, store and use.
•
Aqueous Ammonia to Liquid Ammonium Sulf
ate
Aqueous ammonia, while effective in water treatment, produces vapors that require specialized containment systems. CCWD is replacing it with liquid ammonium sulfate, a more stable alternative that eliminates vapor concerns and reduces the risks associated with handling and storage.

These important safety upgrades are expected to be completed by the spring of 2026.

PROTECTING OUR WATER SYSTEM FROM A GROWING THREAT
An emerging challenge surfaced in the Sacramento-San Joaquin River Delta in 2024 with the detection of golden mussels, an invasive species that can clog source water pipes, pumps, and other critical water infrastructure without proactive management.

CCWD was among the first agencies to identify these mussels in the Delta and took immediate action to mitigate their impact.

Response measures included daily intake screen cleanings, increased monitoring, and expanded inspections. Additionally, CCWD leveraged its operational flexibility to pause diversions at affected intake locations, helping ensure continued reliable water deliveries while assessing this new threat.

While golden mussels in source water do not pose a public health or safety risk, preventing their spread is a top priority. CCWD has long implemented invasive species protection measures at its reservoirs, including watercraft inspections at Contra Loma and a prohibition on personal watercraft use at Los Vaqueros Reservoir.

By staying vigilant and adapting quickly, CCWD is protecting our region’s water supply from this emerging challenge while maintain the high-quality service our customers expect. 2024 ANNUAL WATER QUALITY REPORT
7 DEFINITIONS & ABBREVIATIONS
Action Level (AL) – The concentration of
a contaminant which, if exceeded, triggers
treatment or other requirements which a water
system must follow
Maximum Contaminant Level (MCL) – The
highest level of a contaminant that is allowed
in drinking water. Primary MCLs are set as close
to the PHGs (or MCLGs) as is economically or
technologically feasible
Maximum Contaminant Level Goal (MCLG) –
The level of a contaminant in drinking water
below which there is no known or expected risk to
health. MCLGs are set by the U.S. Environmental
Protection Agency
Maximum Residual Disinfectant Level (MRDL) –
The highest level of a disinfectant allowed in
drinking water. There is convincing evidence that
the addition of a disinfectant is necessary for
control of microbial contaminants
Maximum Residual Disinfectant Level
Goal (MRDLG) – The level of a drinking water
disinfectant below which there is no known or
expected risk to health. MRDLGs do not reflect
the benefits of the use of disinfectants to control
microbial contaminants
mg/L – Milligrams per liter
n/a – Not analyzed or not applicable (when used in
average column, only one data point is available)
ND – Not detected at or above the reporting level
ng/L – Nanograms per liter
NTU – Nephelometric turbidity units
Primary Drinking Water Standards – MCLs
and MRDLs for contaminants that affect health
along with their monitoring and reporting
requirements, and water treatment requirements
pCi/L – Picocuries per liter (a measure of
radioactivity)
Public Health Goal (PHG) – The level of a
contaminant in drinking water below which there
is no known or expected risk to health. PHGs are
set by the California Environmental Protection
Agency Office of Health and Hazard Assessment
RAA – Running Annual Average
Secondary Drinking Water Standards –
Secondary MCLs are set for contaminants that
affect the odor, taste or appearance of water
Treatment Technique (TT) – A required process
intended to reduce the level of a contaminant in
drinking water
µg/L – Micrograms per liter
µmhos/cm– micromhos per centimeter
(a measure of conductivity)

HOW TO READ THE TABLES
The following tables contain detailed information about the water that is delivered to your home or business. Your water is regularly tested for more than 120 chemicals and substances, as well as radioactivity. Only those constituents that were detected last year are listed in the tables. Constituents may vary from provider to provider depending on water source and treatment techniques. Please see https://ccwater.com/341/Contaminants- Monitored for a full list of contaminants monitored.

WHAT’S NEW
This year, the City of Pittsburg monitored for the Fifth Unregulated Contaminant Monitoring Rule (UCMR5). This regulation is part of the Safe Drinking Water Act, which requires the U.S. Environmental Protection Agency to identify up to 30 contaminants every five years for public water systems to monitor. The results help the EPA decide whether these contaminants should have a health-based standard. Water systems have three years to complete this monitoring. Find more information about the Unregulated Contaminant Monitoring Rule at ccwater.com/ucmr.

Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals widely used in consumer products. To learn more about PFAS and drinking water, visit ccwater.com/422.

California established a new MCL for hexavalent chromium effective October 1, 2024. Water systems must complete monitoring by April 1, 2025.

Hexavalent chromium results are from source water locations.

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or Federal
Goal
Highest Amt.

Allowed Range Detected Average
Fluoride (mg/L) 1 2 0.6-0.8 0.7

UNITS EQUIVALENCE
mg/L (milligrams per liter)
ppm (parts per million)
µg/L (micrograms per liter)
ppb (parts per billion)
1 second in 11.5 days
1 second in nearly 32 years
1 2 3
2024 ANNUAL WATER QUALITY REPORT
8 The list below shows common sources for chemicals or constituents that may have been detected in your water. Consult the tables on the following pages to see what was detected in your drinking water.

COMMON SOURCES OF CHEMICALS OR CONSTITUENTS

TYPICAL SOURCE
Aluminum Erosion of natural deposits; residual from some surface water treatment processes Asbestos Internal corrosion of asbestos cement water mains; erosion of natural deposits.

Bromate Byproduct of drinking water disinfection
Chloramines Drinking water disinfectant added for treatment Chloride Runoff/leaching from natural deposits; seawater influence Chlorite Byproduct of drinking water disinfection
Chromium, Hexavalent Erosion of natural deposits.

Color Naturally-occurring organic materials
Copper Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Dichloromethane Discharge from pharmaceutical and chemical factories; insecticide.

E. coli Human and animal fecal waste
Fluoride Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum factories Haloacetic Acids Byproduct of drinking water disinfection Lead Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
Manganese Leaching from natural deposits
Nitrate Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits.

Odor-Threshold Naturally-occurring organic materials
Specific Conductivity Substances that form ions when in water; seawater influence Sulfate Runoff/leaching from natural deposits; industrial wastes Total Coliform Bacteria Naturally present in the environment.

Total Dissolved Solids Runoff/leaching from natural deposits Total Trihalomethanes Byproduct of drinking water disinfection Turbidity Soil runoff
2024 ANNUAL WATER QUALITY REPORT
9 PUBLIC

MEETINGS
First and Third
Wednesday, 6:30 p.m.
1331 Concord Avenue
Concord, CA 94520
925-688-8000
ccwater.com
If you have any
questions about
Contra Costa Water
District tap water,
please call
925-688-8091.
7 CCWD RANDALL-BOLD WTP1

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or Federal
Goal
Highest Amt.

Allowed Range Detected Average Range Detected Average
Aluminum (mg/L) 0.6 1 ND n/a 0.05 n/a
Fluoride (mg/L) 1 2.0 0.6-0.8 0.7 0.7-0.8 0.8
Nitrate as N (mg/L) 10 10 ND n/a ND-0.8 0.3
Lead and Copper Study State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Per
centile
# of Sites
T ested/
# Exceeding AL
90% Per
centile
EPA Lead Study (µg/L) 0.2 15 67/0 ND n/a n/a
EPA Copper Study (mg/L) 0.3 1.3 67/0 0.2 n/a n/a
Date of Study – – 6/2022 n/a
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (CCWD treatment plant) n/a 95% ≤ 0.3 [0.20] [100%] [0.44] [100%] T otal Coliform
(Revised T otal Coliform Rule) n/a 5% of mo.

Samples ND-0.6% 0.1% n/a n/a
State or Federal
Goal
Highest Amt.

Allowed
T otal
Detections
Months in
Violation
T otal
Detections
Months in
Violation
E. Coli 0 0 1 0 n/a n/a
Disinfectant/Disinfection
Byproducts
State or Federal
Goal
Highest Amt.

Allowed Range Detected Highest
Quarterly RAA Range Detected Highest
Quarterly RAA
Chloramines as Cl2 (mg/L) 4 4.0 ND-3.5 1.8 n/a n/a
Haloacetic acids (µg/L) n/a 60 2.8-16 14 n/a n/a
T otal T rihalomethanes (µg/L) n/a 80 11-49 30 n/a n/a

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024 CCWD detected E.
coli in one sample
this year. This was an
isolated detection,
which did not result
in an MCL violation.

All of the required
repeated monitoring
confirmed that the
water system is in
compliance with
microbiological
standards.

CCWD RANDALL-BOLD WTP1

UNTREATED WATER TEST RESULTS
State or Federal
Goal
Highest Amt.

Allowed Range Detected Average Range Detected Average
Chromium [Hexavalent] (µg/L) 0.02 10 ND-0.14 0.11 ND-0.14 0.11 1 Randall-Bold Water Treatment Plant is a regular source of water for CCWD, Diablo Water District and the Golden State Water Company in Bay Point. It is also an as
-needed source of water for Antioch and Brentwood and an emergency source for Pittsburg. 2024 ANNUAL WATER QUALITY REPORT
10 CCWD RANDALL-BOLD WTP1

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Average Range
Detected Average
Alkalinity (mg/L) n/a n/a 44-59 53 46-82 60
Ammonia (mg/L) n/a n/a 0.6 n/a 0.4 n/a
Bromide (mg/L) n/a n/a ND-0.15 0.06 ND-0.2 0.09
Calcium (mg/L) n/a n/a 12-17 15 11-23 16
Hardness (mg/L) n/a n/a 59-87 74 53-116 80
Magnesium (mg/L) n/a n/a 6.4-12 8.7 6.1-14 9.6
pH n/a n/a 8.2-9.0 8.6 7.9-8.9 8.5
Potassium (mg/L) n/a n/a 1.5-3.2 2.2 1.3-3.4 2.2
Sodium (mg/L) n/a n/a 33-69 47 27-66 46
1 Randall-Bold Water Treatment Plant is a regular source of water for CCWD, Diablo Water District and the Golden State Water Company in Bay Point. It is also an as
-needed source of water for Antioch and Brentwood and an emergency source for Pittsburg.

CCWD RANDALL-BOLD WTP1

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or Federal
Goal
Highest Amt.

Allowed Range Detected Average Range Detected Average
Aluminum (µg/L) 600 200 ND n/a 53 n/a
Chloride (mg/L) n/a 250 26-89 47 21-96 52
Color (units) n/a 15 2.0 n/a ND n/a
Copper (mg/L) n/a 1.0 0.01 n/a 0.01 n/a
Odor-threshold (units) n/a 3 2 n/a ND-2 1
Specific Conductivity (µmhos/cm) n/a 900 296-529 391 237-589 396 Sulfate (mg/L) n/a 250 50-71 57 26-72 45
T otal Dissolved Solids (mg/L) n/a 500 157-279 210 128-303 210 T urbidity (NTU) (CCWD distribution system) n/a 5 0.03-0.84 0.20 n/a n/a

CONTRA COSTA WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024 2024 ANNUAL WATER QUALITY REPORT
11 PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Aluminum (mg/L) 0.6 1 ND-0.06 0.03
Fluoride (mg/L) 1 2.0 0.7-0.9 0.8
Nitrate as N (mg/L) 10 10 ND-0.9 0.5
Lead and Copper Study State or Federal
Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Per
centile
EPA Lead Study (µg/L) 0.2 15 58/2 ND
EPA Copper Study (mg/L) 0.3 1.3 58/0 0.08
Date of Study – – 9/2024
Microbiological Standards State or Federal
Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T otal Coliform (State T otal Coliform Rule) n/a 5% of mo.

Samples 0%-0.8% 0.1%
T urbidity (NTU) (city treatment plant) n/a 95% ≤ 0.3 [0.17] [99.9%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Chloramines as CI2 (mg/L) 4 4.0 0.1-4.0 2.6
Haloacetic acids (µg/L) n/a 60 0 - 22 10
T otal trihalomethanes (µg/L) n/a 80 18 - 82 62

SOURCE OF WATER
The City of Antioch purchases untreated water
from CCWD, treats it in a City-owned treatment
plant and delivers it to customers through the
City’s distribution pipes. The City is also able
to pump directly from the San Joaquin River or
purchase treated water from CCWD, which was
the case in 2024. Only a small percentage of
customers received drinking water from CCWD.

The City completes watershed sanitary surveys
every five years. The last survey, completed in
2022, concluded that potential contamination
is regularly mitigated by the natural flushing of
the Delta, controls at contamination sources
and existing water treatment practices.

In April 2003, Antioch conducted a source water
assessment. In summary:
•
Antioch Municipal R
eservoir was found
to be most vulnerable to sewer collection
systems; this activity is not associated with
contaminants in the water supply.
•
San Joaquin Riv
er was found to be most
vulnerable to the effects of saltwater intrusion,
chemical/petroleum processing or storage,
and regulated point discharges.

Water from the San Joaquin River can be
affected by saltwater intrusion. When chloride
levels in the river exceed 250 milligrams per
liter, the City stops pumping until chloride
levels decrease.

CITY OF ANTIOCH
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024 2024 ANNUAL WATER QUALITY REPORT
12 GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Alkalinity (mg/L) n/a n/a 50 - 85 67
Ammonia (mg/L) n/a n/a ND-0.6 0.3
Bromide (mg/L) n/a n/a ND-0.14 0.07
Calcium (mg/L) n/a n/a 10-56 16
Hardness (mg/L) n/a n/a 49 -145 76
Magnesium (mg/L) n/a n/a 7.9-12 10
pH n/a n/a 8.0 - 9.1 8.62
Potassium (mg/L) n/a n/a 1.7-3.2 2.4
Sodium (mg/L) n/a n/a 48-70 59

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Aluminum (µg/L) 600 200 ND-64 32
Chloride (mg/L) n/a 250 19 -124 54
Color (units) n/a 15 ND-2.0 1
Copper (mg/L) n/a 1.0 .003-.005 0.004
Specific Conductivity (µmhos/cm) n/a 900 214 - 689 407
Sulfate (mg/L) n/a 250 51 51
T otal Dissolved Solids (mg/L) n/a 500 220 - 280 250
T urbidity (NTU) (city distribution system) n/a 5 0.05 - 0.71 0.08

CITY OF ANTIOCH
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024 2024 ANNUAL WATER QUALITY REPORT
13 CITY OF MARTINEZ
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024

SOURCE OF WATER
The City of Martinez purchases untreated
water from CCWD, treats it in a City-owned
treatment plant and delivers it through the
City’s distribution pipes to customers who
are not served treated water directly from
CCWD.

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Asbestos (MFL) 7 7 ND-0.2 ND
Fluoride (mg/L) 1 2.0 0.6-0.9 0.7
Lead and Copper Study State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 61/0 ND
EPA Copper Study (mg/L) 0.3 1.3 61/0 0.15
Date of Study – – 2/2024
Microbiological Standards State or
Federal Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or
[Monthly % of
Samples that
Meet Req.]
T otal Coliform
(Revised T otal Coliform Rule) n/a 5% of mo.

Samples ND-3.6% 0.5%
T urbidity (NTU) (city treatment plant) n/a 95% ≤ 0.3 [0.15] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 ND-8 ND
Chloramines as Cl2 (mg/L) 4 4.0 ND-4.2 1.8
Haloacetic acids (µg/L) n/a 60 ND-5.3 4.0
T otal T rihalomethanes (µg/L) n/a 80 9.9-32 21
2024 ANNUAL WATER QUALITY REPORT
14 PUBLIC MEETINGS
First and Third Wednesdays
7:00 p.m.
525 Henrietta Street
Martinez, CA 94553
925-372-2512
cityofmartinez.org
If you have any questions about the
City of Martinez tap water, please
call 925-372-3588.

CITY OF MARTINEZ
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Alkalinity (mg/L) n/a n/a 43 - 85 65
Bromide (mg/L) n/a n/a ND - 0.3 0.2
Calcium (mg/L) n/a n/a 13 - 17 15
Hardness (mg/L) n/a n/a 50 - 128 78
Magnesium (mg/L) n/a n/a 6.4 - 11 9.0
pH n/a n/a 7.7 - 9.3 9.0
Potassium (mg/L) n/a n/a 1.4 - 3.3 2.4
Sodium (mg/L) n/a n/a 29 - 65 47

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Chloride (mg/L) n/a 250 20-125 59
Color (units) n/a 15 ND-2.0 1
Copper (mg/L) n/a 1.0 ND-0.002 0.001
Odor-threshold (units) n/a 3 ND-3 2
Specific Conductivity (µmhos/cm) n/a 900 260-540 400
Sulfate (mg/L) n/a 250 29 - 43 36
T otal Dissolved Solids (mg/L) n/a 500 130 - 465 262
T urbidity (NTU) (distribution system) n/a 5 0.02 - 0.42 0.13 2024 ANNUAL WATER QUALITY REPORT
15 CITY OF PITTSBURG
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024

A source water assessment was conducted
for the Dover Well in September 2015, and
for Bodega Well in July 2009. In summary:
•
Bodeg
a well was found to be most
vulnerable to residential sewer collection
systems, abandoned military installation
(Camp Stoneman) and illegal activities
(drug labs).
•
Dov
er well was considered most
vulnerable to sewer collection systems,
transportation corridors, and storm
drain discharge points. No contaminants
associated with the identified potentially
contaminating activities (PCA) have been
detected in water samples from Dover well.

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Aluminum (mg/L) 0.6 1 ND-0.08 0.06
Fluoride (mg/L) 1 2.0 0.5-0.8 0.7
Nitrate as N (mg/L) 10 10 ND-1.7 1.2
Lead and Copper Study State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90% Percentile
EPA Lead Study (µg/L) 0.2 15 45/1 ND
EPA Copper Study (mg/L) 0.3 1.3 45/0 ND
Date of Study 8/2024
Microbiological Standards State or
Federal Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or
[Monthly % of
Samples that
Meet Req.]
T urbidity (NTU) (city treatment plant) n/a 95% ≤ 0.3 [0.20] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Chlorite (mg/L) 0.05 0.05 0.1-0.4 0.2
Chloramines as Cl2 (mg/L) 4 4.0 0.2-2.4 1.4
Haloacetic acids (µg/L) n/a 60 5.4-11 7.6
T otal trihalomethanes (µg/L) n/a 80 39-58 48
2024 ANNUAL WATER QUALITY REPORT
16 PUBLIC MEETINGS
First and Third Mondays
7:00 p.m.
65 Civic Avenue
Pittsburg, CA 94565
925-252-4850
ci.pittsburg.ca.us
If you have any questions about the
City of Pittsburg tap water, please call
925-252-6916.

CITY OF PITTSBURG
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Alkalinity (mg/L) n/a n/a 60-160 93
Ammonia (mg/L) n/a n/a ND - 0.4 0.2
Calcium (mg/L) n/a n/a 23 n/a
Hardness (mg/L) n/a n/a 76-217 156
Magnesium (mg/L) n/a n/a 12 n/a
pH n/a n/a 7.2-8.9 8.5
Potassium (mg/L) n/a n/a 2.0 n/a
Sodium (mg/L) n/a n/a 44 n/a
UCMR5 ASSESSMENT MONITORING
(2024-2025)
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Lithium (µg/L) n/a n/a ND-23 11.5

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage
Aluminum (µg/L) 600 200 ND-80 60
Chloride (mg/L) n/a 250 42-159 95
Odor-threshold (units) n/a 3 1-2 1
Specific Conductivity (µmhos/cm) n/a 900 320-928 670
Sulfate (mg/L) n/a 250 58-114 81
T otal Dissolved Solids (mg/L) n/a 500 173-516 371
T urbidity (NTU) (city distribution system) n/a 5 0.02-0.27 0.11 2024 ANNUAL WATER QUALITY REPORT
17 DIABLO WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024

SOURCE OF WATER
Diablo Water District
purchases untreated
water from CCWD. Water
is treated and blended
with groundwater pumped
from two wells. The treated
water is then delivered
to customers through its
distribution pipes.

A source water assessment
was conducted for the
Glen Park well in April 2005
and for Stonecreek well in
March 2011. In summary:
•
Both w
ells were found
to be most vulnerable to
historic waste dumps/
landfills and septic
systems (high density,
>1/acre). These activities
are not associated with
contaminants in the water
supply.

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

SECONDARY DRINKING WATER STANDARDS
Contaminants that may affect the odor, taste, or appearance of water State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage Range
Detected Av erage
Aluminum (µg/L) 600 200 ND n/a 53 n/a
Chloride (mg/L) n/a 250 47-100 67 21-96 52
Color (units) n/a 15 ND-140 31 ND n/a
Copper (mg/L) n/a 1.0 ND n/a 0.01 n/a
Manganese (µg/L) n/a 50 ND-140 31 ND n/a
Odor-threshold (units) n/a 3 3 n/a ND-2 1
Specific Conductivity (µmhos/cm) n/a 900 452-656 522 237-589 396 Sulfate (mg/L) n/a 250 38-89 63 26-72 45
T otal Dissolved Solids (mg/L) n/a 500 226-348 278 128-303 210 T urbidity (NTU) (DWD distribution system) n/a 5 0.08-0.68 0.22 n/a n/a

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

PRIMARY DRINKING WATER STANDARDS
Contaminants that may affect health
Inorganic State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage Range
Detected Average
Fluoride (mg/L) 1 2.0 0.67-0.74 0.71 0.7-0.8 0.8
Nitrate as N (mg/L) 10 10 0.1-0.9 0.4 ND-0.8 0.3
Lead and Copper Study State or
Federal Goal
Highest Amt.

Allowed
# of Sites
T ested/
# Exceeding AL
90%
Per centile
# of Sites
T ested/
# Exceeding AL
90%
Per centile
EPA Lead Study (µg/L) 0.2 15 29/0 1.9 n/a n/a
EPA Copper Study (mg/L) 0.3 1.3 29/0 0.24 n/a n/a
Date of Study 6/2022 n/a
Microbiological Standards State or
Federal Goal
Highest Amt.

Allowed
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
Range or
[Maximum
Value]
Avg. or [Monthly
% of Samples
that Meet Req.]
T urbidity (NTU) (DWD treatment plant) n/a 95% ≤ 0.3 n/a n/a [0.44] [100%] Disinfectant/Disinfection
Byproducts
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected
Highest
Quarterly RAA
Range
Detected
Highest
Quarterly RAA
Bromate (µg/L) 0.1 10 n/a n/a ND n/a
Chloramines as Cl2 (mg/L) 4 4.0 ND-3.3 2.6 n/a n/a
Haloacetic acids (µg/L) n/a 60 4.2-14 8.0 n/a n/a
T otal T rihalomethanes (µg/L) n/a 80 11-40 21 n/a n/a
2024 ANNUAL WATER QUALITY REPORT
18 PUBLIC MEETINGS
Fourth Wednesday
6:30 p.m.
3990 Main Street
Oakley, CA 94561
925-625-3798
diablowater.org
If you have any questions
about Diablo Water
District tap water, please
call 925-625-2112.

DIABLO WATER DISTRICT
TABLE OF CHEMICALS OR CONSTITUENTS DETECTED IN WATER IN 2024

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*
UCMR5 ASSESSMENT MONITORING
2023–2025
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage Range
Detected Av erage
Lithium (µg/L) n/a n/a ND-15 10 n/a n/a

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

UNTREATED WELL WATER TEST RESULTS
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage Range
Detected Av erage
Boron (mg/L) n/a 1 1.4 n/a n/a n/a
Combined Ra 226 & Ra 228 (pCi/L) 0 5 ND-2.2 1.4 n/a n/a Radium 226 (pCi/L) 0.05 n/a ND-2.2 1.2 n/a n/a
Gross Alpha (pCi/L) 0 15 6.3-9.0 7.5 n/a n/a
Gross Beta (pCi/L) 0 50 ND-21 9.8 n/a n/a
Uranium (pCi/L) 0.43 20 2.4-2.8 2.5 n/a n/a

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

GENERAL WATER QUALITY PARAMETERS
Non-regulated parameters of general interest to consumers State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage Range
Detected Av erage
Alkalinity (mg/L) n/a n/a 55--96 79 46-82 60
Ammonia (mg/L) n/a n/a 0.6 n/a 0.4 n/a
Bromide (mg/L) n/a n/a ND-0.22 0.11 ND-0.2 0.09
Calcium (mg/L) n/a n/a 16-32 24 11-23 16
Hardness (mg/L) n/a n/a 85-147 115 53-116 80
Magnesium (mg/L) n/a n/a 9.8-17 14 6.1-14 9.6
pH n/a n/a 7.7-8.8 8.3 7.9-8.9 8.5
Potassium (mg/L) n/a n/a 1.6-3.3 2.3 1.3-3.4 2.2
Sodium (mg/L) n/a n/a 48-73 57 27-66 46

DIABLO WATER

DISTRICT

RANDALL-BOLD
WTP*

UNTREATED WATER TEST RESULTS
State or
Federal Goal
Highest Amt.

Allowed
Range
Detected Av erage Range
Detected Av erage
Chromium [Hexavalent] (ug/L) 0.02 10 0.1-1.8 0.6 ND-0.14 0.11 Boron was detected above
the notification level.

Boron exposures resulted
in decreased fetal weight
(developmental effects) in
newborn rats.

Manganese was detected
above the secondary
maximum contaminant
level (MCL). Secondary
MCLs are based on
aesthetic considerations
and may affect the color
and taste of the water.

DWD’s notification with
more information on
Manganese can be found
at diablowater.org/
ccrnotice
2024 ANNUAL WATER QUALITY REPORT
19 WANT MORE
INFORMATION?
Contra Costa Water District’s website
contains valuable information about
your water service. Visit ccwater.com
to begin your research.

This report contains important information about your drinking water. Have someone translate it for you, or speak with someone who understands it.

Su informe anual de la calidad del agua en español está disponible en línea en ccwater.com/awqr_es. Este informe contiene información importante sobre su agua potable.

Mahalaga ang impormasyong ito. Mangyaring ipasalin ito.

City of Antioch
2025 Urban Water Management Plan
August 2026

Appendix H

Water and Wastewater Rate Study

March 2015

FINAL DRAFT
Water and Sewer
Rates and Capacity
Charges Study
Submitted by
Prepared for City of Antioch, California

2960 Valley Basin Avenue
Henderson, Nevada 89052

F I N A L D R A F T
Water and Sewer Rates and Capacity Charges Study
Prepared for
City of Antioch, California
March 2015

This Page Intentionally Blank

iii
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Table of Contents
List of Figures ...................................................................................................................................................... v List of Tables ...................................................................................................................................................... vi List of Abbreviations ........................................................................................................................................ viii Executive Summary ...................................................................................................................................... ES#1 Water Fund 611 Revenue Required from Rates .................................................................................. ES#1 Water Fund 612 Revenue Projected from Capacity Charges .............................................................. ES#1 Sewer Fund 621 Revenue Required from Sewer Service Charges ..................................................... ES#2 Sewer Fund 622 Revenue Projected from Capacity Charges ............................................................. ES#2 Recommended Water Rates .................................................................................................................. ES#3 Recommended Sewer Service Charges ................................................................................................ ES#4 Recommended Water and Sewer Capacity Charges ............................................................................ ES#5

1. Introduction ............................................................................................................................................... 1#1

1.1 Organization of the Report ............................................................................................................ 1#1

1.2 Rate#Making Objectives ................................................................................................................. 1#1

1.3 Overview of Utility Rate Setting Process ....................................................................................... 1#2

1.4 Antioch Water Utility ....................................................................................................................... 1#3

1.5 Current Water Rates ...................................................................................................................... 1#6

1.6 Antioch Sewer Utility ...................................................................................................................... 1#7

1.7 Current Sewer Service Charges .................................................................................................... 1#8

1.8 Water System Comparison with Comparable Cities .................................................................... 1#9

1.8.1 Comparison of Comprehensive Annual Financial Reports ............................................ 1#9

1.8.2 Comparison of Water System Efficiency Metrics ......................................................... 1#10

2. User Characteristics ................................................................................................................................. 2#1

2.1 Historic Water Deliveries ............................................................................................................... 2#1

2.2 Evaluation of Water Use by Pressure Zone .................................................................................. 2#2

2.3 Evaluation of Water Use by Block for Single Family Residential ................................................. 2#3

2.4 Water Meter Equivalency Factors ................................................................................................. 2#4

2.5 Water Meters .................................................................................................................................. 2#5

3. Development of Water Rates ................................................................................................................... 3#1

3.1 Current Water Rates and Revenue from Rates............................................................................ 3#1

3.2 Projected Expenditures and Funding Sources ............................................................................. 3#2

3.2.1 Projected Expenditures .................................................................................................... 3#2

3.2.2 Projected Source of Funds .............................................................................................. 3#3

3.3 Base – Extra Capacity Cost Allocation .......................................................................................... 3#4

3.4 Allocation of Costs to Functional Categories ................................................................................ 3#4

3.5 Water Rate and Charges Unit Costs ............................................................................................. 3#6

3.6 Recommended Water Rates and Charges ................................................................................... 3#7 Table of Contents Water and Sewer Rates and Capacity Charges Study

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3.7 Revenue from Water Rates and Charges ..................................................................................... 3#8

3.8 Water Fund 611 Projected Cash Flow .......................................................................................... 3#9

3.9 Water Fund 611 Target Balances ............................................................................................... 3#10

3.10 Single Family Residential Monthly Water Bills ........................................................................... 3#11

3.11 Residential Monthly Water Bills Surveys .................................................................................... 3#11

4. Development of Sewer Service Charges ................................................................................................. 4#1

4.1 Current Sewer Service Charges and Revenue from Charges ...................................................... 4#1

4.2 Methodology for Determination of Updated Sewer Service Charges ......................................... 4#2

4.3 Sewer Fund 621 Projected Expenditures ..................................................................................... 4#3

4.4 Residential Dwelling Units and Wastewater Discharge ............................................................... 4#4

4.5 Total Wastewater Discharge.......................................................................................................... 4#5

4.6 Revenue Required from Sewer Service Charges ......................................................................... 4#6

4.7 Allocation of Costs to Functional Categories ................................................................................ 4#6

4.8 Calculation of Unit Costs ............................................................................................................... 4#7

4.9 Revenue Required from Each Customer Class ............................................................................ 4#8

4.10 Development of Sewer Service Charges ...................................................................................... 4#9

4.11 Recommended Sewer Service Charges...................................................................................... 4#10

4.12 Sewer Fund 621 Projected Cash Flow ........................................................................................ 4#11

4.13 Sewer Fund 621 Target Balances............................................................................................... 4#12

4.14 Recommended Sewer Service Charges, FY16 – FY20 .............................................................. 4#13

4.15 Residential Sewer Service Charges Surveys .............................................................................. 4#14

5. Development of Water Capacity Charges ............................................................................................... 5#1

5.1 Regulatory Requirements .............................................................................................................. 5#1

5.2 Conceptual Approach ..................................................................................................................... 5#1

5.3 Current Water Capacity Charges ................................................................................................... 5#2

5.4 Water System Valuation and Capacity .......................................................................................... 5#3

5.5 Water System Unit Cost of Capacity ............................................................................................. 5#5

5.6 Single Family Residential Peak Month Water Use ....................................................................... 5#5

5.7 Schedule of Water Capacity Charges............................................................................................ 5#6

5.8 Comparison of Current vs. Recommended Capacity Charges .................................................... 5#7

5.9 Survey of Single Family Water Capacity Charges ......................................................................... 5#7

5.10 Water Fund 612 Projected Cash Flow .......................................................................................... 5#8

6. Development of Sewer Capacity Charges ............................................................................................... 6#1

6.1 Regulatory Requirements .............................................................................................................. 6#1

6.2 Conceptual Approach ..................................................................................................................... 6#1

6.3 Current Sewer Capacity Charges................................................................................................... 6#2

6.4 Sewer System Valuation and Capacity ......................................................................................... 6#2

6.5 Sewer Unit Cost of Capacity .......................................................................................................... 6#4

6.6 Schedule of Sewer Capacity Charges ........................................................................................... 6#4

6.7 Comparison of Current vs. Recommended Capacity Charges .................................................... 6#5

6.8 Survey of Single Family Capacity Charges .................................................................................... 6#5

6.9 Sewer Facility Expansion Fund 622 Projected Cash Flow ........................................................... 6#6 Water and Sewer Rates and Capacity Charges Study Table of Contents

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7. Limitations ................................................................................................................................................ 7#1 Appendix A: Water Use Data ............................................................................................................................... A Appendix B: Water “Plant in Service Factors” and Allocation of Costs ........................................................... B Appendix C: Water Quantity, Meter and Private Fire Service Charges Development Tables ........................ C Appendix D: Single Family Monthly Water Bills Tables .................................................................................... D Appendix E: Historic and Projected Wastewater Flow ......................................................................................E Appendix F: Water Capacity Charge Tables ....................................................................................................... F Appendix G: Sewer Capacity Charge Tables ..................................................................................................... G

List of Figures
Figure 1#1. Overview of Rate Setting Analytical Steps ................................................................................. 1#2 Figure 1#2. Water Demand (CY13) and Number of Meters by Customer Class (December 2013) .......... 1#5 Figure 1#3. Number of Meters by Size (December 2013) ........................................................................... 1#5 Figure 1#4. Wastewater Discharge and Number of Accounts/Dwelling Units ............................................ 1#8 Figure 2#1. Metered Water Use by Customer Class and Month for 2012 and 2013 ................................ 2#1 Figure 2#2. Projected Metered Water Use by Customer Class .................................................................... 2#2 Figure 2#3. Water Use by Pressure Zone ...................................................................................................... 2#2 Figure 2#4. Single Family Residential Average Monthly Water Use, HCF ................................................... 2#3 Figure 2#5. Single Family Residential Total Water Use, HCF ....................................................................... 2#3 Figure 3#1. Projected Cash for Water Fund 611 and Water Fund 612 .................................................... 3#10 Figure 3#2. Historic and Projected Monthly Single Family Water Bills, FY9 – FY20 ................................ 3#11 Figure 3#3. Single Family Monthly Water Bills Survey................................................................................ 3#11 Figure 4#1. Projected Cash for Sewer Fund 621 and Sewer Fund 622 ................................................... 4#12 Figure 4#2. Historic and Recommended Sewer Service Charges, FY9 – FY20 ........................................ 4#13

Table of Contents Water and Sewer Rates and Capacity Charges Study

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List of Tables
Table ES#1. Recommended Water Rates and Charges ............................................................................. ES#3 Table ES#2. Recommended Sewer Service Rates and Charges ............................................................... ES#4 Table ES#3. Recommended Water Capacity Charges ................................................................................ ES#5 Table ES#4. Recommended Sewer Capacity Charges................................................................................ ES#5 Table 1#1. Water System Financial Metrics .................................................................................................. 1#9 Table 1#2. Water System Efficiency Metrics ............................................................................................... 1#10 Table 2#1. Water Meter Equivalency Factors ............................................................................................... 2#4 Table 2#2. Water Meters ................................................................................................................................ 2#5 Table 2#3. Equivalent Water Meters ............................................................................................................. 2#5 Table 3#1. Water Fund 611 Budgeted and Projected Expenditures ........................................................... 3#2 Table 3#2. Source of Funds for Capital Expenditures .................................................................................. 3#3 Table 3#3. Source of Funds for All Projected Water Fund 611 Expenditures ............................................ 3#3 Table 3#4. Allocation of Costs to Functional Categories .............................................................................. 3#5 Table 3#5. Water Rates and Charges Unit Costs .......................................................................................... 3#6 Table 3#6. Recommended Water Rates and Charges ................................................................................. 3#7 Table 3#7. Revenue by Rate/Charge Category ............................................................................................. 3#8 Table 3#8. Water Fund 611 Projected Cash Flow ........................................................................................ 3#9 Table 3#9. Water Fund 611 Projected Target Balances ............................................................................ 3#10 Table 4#1. Sewer Fund 621 Budgeted and Projected Expenditures .......................................................... 4#3 Table 4#2. Wastewater Discharge for Residential Dwelling Units ............................................................... 4#4 Table 4#3. Current and Projected Wastewater Discharge ........................................................................... 4#5 Table 4#4. Source of Funds for All Projected Sewer Fund 621 Expenditures ............................................ 4#6 Table 4#5. Allocation of Revenue Required to Functional Categories ........................................................ 4#6 Table 4#6. Calculation of Unit Costs .............................................................................................................. 4#7 Table 4#7. Calculation of Revenue Required from Customer Classes ........................................................ 4#8 Table 4#8. Development of Sewer Service Charges ..................................................................................... 4#9 Table 4#9. Recommended Sewer Service Rates and Charges.................................................................. 4#10 Table 4#10. Sewer Fund 621 Projected Cash Flow ................................................................................... 4#11 Table 4#11. Sewer Fund 621 Projected Target Balances ......................................................................... 4#12 Table 4#12. Residential Sewer Service Charges Survey ............................................................................ 4#14 Table 4#13. Single Family Sewer Service and Wastewater Treatment Charges Survey .......................... 4#14 Table 5#1. Valuation of Water System .......................................................................................................... 5#4 Table 5#2. Water System Unit Cost of Capacity ............................................................................................ 5#5 Water and Sewer Rates and Capacity Charges Study Table of Contents

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Table 5#3. Single Family Residential Peak Month Water Use ..................................................................... 5#5 Table 5#4. Recommended Water Capacity Charges .................................................................................... 5#6 Table 5#5. Current and Recommended Water Capacity Charges ............................................................... 5#7 Table 5#6. Survey of Single Family Water Capacity Charges ....................................................................... 5#7 Table 5#7. Water Fund 612 Projected Cash Flow ........................................................................................ 5#8 Table 6#1. Valuation of Sewer System .......................................................................................................... 6#3 Table 6#2. Sewer System Capacity ................................................................................................................ 6#3 Table 6#3. Sewer Unit Cost of Capacity......................................................................................................... 6#4 Table 6#4. Recommended Sewer Capacity Charges .................................................................................... 6#4 Table 6#5. Current and Recommended Residential Sewer Capacity Charges ........................................... 6#5 Table 6#6. Survey of Single Family Sewer Capacity Charges....................................................................... 6#5 Table 6#7. Survey of Single Family Wastewater Collection, Treatment and Disposal Capacity Charges . 6#6 Table 6#8. Sewer Fund 612 Projected Cash Flow ........................................................................................ 6#6

Table of Contents Water and Sewer Rates and Capacity Charges Study

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List of Abbreviations
AF acre feet (equal to 325,851 gallons)
AMC Antioch Municipal Code
AWWA American Water Works Association
BOD Biochemical Oxygen Demand
CAFR Comprehensive Annual Financial Report
CCI Construction Cost Index
CCWD Contra Costa Water District
CIP Capital Improvement Program
City City of Antioch
DD Delta Diablo
DSC debt service coverage
DWR Department of Water Resources
FY Fiscal year (July 1 to June 30)
ENR Engineering News Record
FY14 July 1, 2013 to June 30, 2014
gpd gallons per day
HCF Hundred Cubic Feet (equal to ~ 748.1 gallons)
mgd million gallons per day
O&M Operation and maintenance
SWRCB State Water Resources Control Board
TSS Total Suspended Solids

ES1
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document.

Executive Summary
The City of Antioch, in conjunction with Municipal Financial Services, has analyzed the adequacy of revenues from rates to meet projected expenditures of the water and sewer enterprise funds to determine whether revenues will be adequate to cover operating and maintenance costs as well as needed capital costs while meeting target reserve levels. Water rates and charges and Sewer Service Charges were developed for the fiveyear period Fiscal Year 2015 – 16 (FY16) through FY20.

Water Fund 611 Revenue Required from Rates
Water rates were developed to generate sufficient revenues to cover operating and maintenance expenditures and capital expenditures,
and to meet target reserve levels. The
approximate amount of revenues
required from water rates for the five
year period, FY16 through FY20, is
$167,480,000.

Projected capital expenditures in Fund
611 during the same time period are
approximately $14,300,000. In
addition to projected capital
expenditures, an amount of
$1,000,000 is allocated to a capital
reserve as a funding source for future
capital expenditures. A summary of the
projected fiveyear expenditures,
revenues, and fund balances is shown
in the adjacent table.

Note that no debt service is proposed
for this fund and that available fund balance is used to mitigate greater increases in water rates.

Water Fund 612 Revenue Projected from Capacity Charges
Water capacity charges were developed in accordance with applicable requirements found in the State of California Government Code. Capacity charges are intended to recover both a portion of the proposed Capital Improvement Program (CIP) cost, and utility rate payers’ prior investment in capital facilities that support land development by providing capacity for new connections. Projected capital expenditures during the same time period are $7,695,000. The approximate amount of revenues projected from water capacity charges for the fiveyear period, FY16 through FY20, is $6,561,000. The available fund balance is reduced by approximately $1,100,000 during the fiveyear period.

Be g inning Balance , J uly 1 , 2 0 1 5 Be g inning Balance , J uly 1 , 2 0 1 5 Be g inning Balance , J uly 1 , 2 0 1 5 Be g inning Balance , J uly 1 , 2 0 1 5 $ 1 5 , 7 2 9 , 0 0 0 $ 1 5 , 7 2 9 , 0 0 0 $ 1 5 , 7 2 9 , 0 0 0 $ 1 5 , 7 2 9 , 0 0 0 Expe nditure s Expe nditure s Expe nditure s Expe nditure s Production, Service & Supplies $102,208,000 58%
Distribution $34,322,000 20%
Supervision $17,571,000 10%
Capital Expenses $14,271,000 8%
Meter Reading/Warehouse/Stores $6,575,000 4%
Capital Reserve $1,000,000 1%
T otal Expe nditure s T otal Expe nditure s T otal Expe nditure s T otal Expe nditure s $ 1 7 5 , 9 4 7 , 0 0 0 $ 1 7 5 , 9 4 7 , 0 0 0 $ 1 7 5 , 9 4 7 , 0 0 0 $ 1 7 5 , 9 4 7 , 0 0 0 1 0 0 % 1 0 0 % 1 0 0 % 1 0 0 % Re ve nue s Re ve nue s Re ve nue s Re ve nue s
Charges for Services $167,480,000 99%
Warehouse/Stores $1,400,000 0.8%
Investment Income and Other $255,000 0.2%
T otal Re ve nue s T otal Re ve nue s T otal Re ve nue s T otal Re ve nue s $ 1 6 9 , 1 3 5 , 0 0 0 $ 1 6 9 , 1 3 5 , 0 0 0 $ 1 6 9 , 1 3 5 , 0 0 0 $ 1 6 9 , 1 3 5 , 0 0 0 1 0 0 % 1 0 0 % 1 0 0 % 1 0 0 % Net Revenues ($6,812,000)
Ending Balance , J une 3 0 , 2 0 2 0 Ending Balance , J une 3 0 , 2 0 2 0 Ending Balance , J une 3 0 , 2 0 2 0 Ending Balance , J une 3 0 , 2 0 2 0 $ 8 , 9 1 7 , 0 0 0 $ 8 , 9 1 7 , 0 0 0 $ 8 , 9 1 7 , 0 0 0 $ 8 , 9 1 7 , 0 0 0 Ending Balance 9 0 Days Cash T arg e t Ending Balance 9 0 Days Cash T arg e t Ending Balance 9 0 Days Cash T arg e t Ending Balance 9 0 Days Cash T arg e t $ 8 , 5 5 6 , 0 0 0 $ 8 , 5 5 6 , 0 0 0 $ 8 , 5 5 6 , 0 0 0 $ 8 , 5 5 6 , 0 0 0 Executive Summary Water and Sewer Rates and Capacity Charges Study

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Sewer Fund 621 Revenue Required from Sewer Service Charges Sewer Service Charges were developed to generate sufficient revenues to cover operating and maintenance expenditures and capital expenditures, and to meet target reserve levels. The approximate amount of revenues required from sewer
service charges for the fiveyear period,
FY16 through FY20, is $29,861,000.

Projected capital expenditures in Fund
621 during the same time period are
approximately $7,000,000. In addition
to projected capital expenditures, an
amount of $500,000 is allocated to a
capital reserve as a funding source for
future capital expenditures. A summary
of the projected fiveyear expenditures,
revenues, and fund balances is shown in
the adjacent table.

Note that no debt service is proposed for
this fund and that available fund balance is used to mitigate greater increases in Sewer Service Charges.

Sewer Fund 622 Revenue Projected from Capacity Charges
Sewer capacity charges were developed in accordance with applicable requirements found in the State of California Government Code. Capacity charges are intended to recover both a portion of the proposed Capital Improvement Program cost, and utility rate payers’ prior investment in capital facilities that support land development by providing capacity for new connections. Projected capital expenditures during the same time period are $2,500,000. The approximate amount of revenues projected from sewer capacity charges for the fiveyear period, FY16 through FY20, is $3,200,000.

Be g inning Balance , J uly 1 , 2 0 1 5 Be g inning Balance , J uly 1 , 2 0 1 5 Be g inning Balance , J uly 1 , 2 0 1 5 Be g inning Balance , J uly 1 , 2 0 1 5 $ 1 0 , 3 7 3 , 0 0 0 $ 1 0 , 3 7 3 , 0 0 0 $ 1 0 , 3 7 3 , 0 0 0 $ 1 0 , 3 7 3 , 0 0 0 Expe nditure s Expe nditure s Expe nditure s Expe nditure s Collection $22,269,000 59%
Supervision $8,042,000 21%
Capital Expenses $6,970,000 18%
Capital Reserve $500,000 1%
T otal Expe nditure s T otal Expe nditure s T otal Expe nditure s T otal Expe nditure s $ 3 7 , 7 8 1 , 0 0 0 $ 3 7 , 7 8 1 , 0 0 0 $ 3 7 , 7 8 1 , 0 0 0 $ 3 7 , 7 8 1 , 0 0 0 1 0 0 % 1 0 0 % 1 0 0 % 1 0 0 % Re ve nue s Re ve nue s Re ve nue s Re ve nue s
Charges for Services $29,861,000 99%
Investment Income and Other $178,000 1%
T otal Re ve nue s T otal Re ve nue s T otal Re ve nue s T otal Re ve nue s $ 3 0 , 0 3 9 , 0 0 0 $ 3 0 , 0 3 9 , 0 0 0 $ 3 0 , 0 3 9 , 0 0 0 $ 3 0 , 0 3 9 , 0 0 0 1 0 0 % 1 0 0 % 1 0 0 % 1 0 0 % Net Revenues ($7,742,000)
Ending Balance , J une 3 0 , 2 0 2 0 Ending Balance , J une 3 0 , 2 0 2 0 Ending Balance , J une 3 0 , 2 0 2 0 Ending Balance , J une 3 0 , 2 0 2 0 $ 2 , 6 3 1 , 0 0 0 $ 2 , 6 3 1 , 0 0 0 $ 2 , 6 3 1 , 0 0 0 $ 2 , 6 3 1 , 0 0 0 Ending Balance 9 0 Days Cash T arg e t Ending Balance 9 0 Days Cash T arg e t Ending Balance 9 0 Days Cash T arg e t Ending Balance 9 0 Days Cash T arg e t $ 1 , 5 6 3 , 0 0 0 $ 1 , 5 6 3 , 0 0 0 $ 1 , 5 6 3 , 0 0 0 $ 1 , 5 6 3 , 0 0 0 Water and Sewer Rates and Capacity Charges Study Executive Summary

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Recommended Water Rates
Recommended water quantity rates and water meter service charges for FY16 – FY20 are listed in the table below. Note that Single Family water quantity rates for FY16 – FY20 are not uniform for each elevation zone. Uniform water quantity rates are replaced with inclining block (tiered) rates with two tiers of water use. The price break for the two tiers for FY16 and FY17 is 13 hundred cubic feet (HCF) per month. Water consumption less than or equal to 13 hundred cubic feet per month is charged the Tier 1 rate applicable to each elevation zone and water consumption greater than 13 HCF per month is charged the Tier 2 rate applicable to each elevation zone.

The price break decreases to 12 HCF for FY18 – FY20. The decrease in the price break reflects projections of continued water conservation. The development of inclining block rates is described in Section 3.

Table ES 1. Recommended Water Rates and Charges

effective dates > 7/1/2015 7/1/2016 7/1/2017 7/1/2018 7/ 1/2019 Service Category Current 2015816 2016817 2017818 2018819 2019820 Quantity Rates, $/HCF HCF = hundred cubic feet (748 gallons) Non8Single Family
Zone I $2.42 $2.99 $3.24 $3.73 $4.05 $4.44
Zone II $2.51 $3.08 $3.33 $3.83 $4.16 $4.55
Zone III $2.64 $3.15 $3.41 $3.92 $4.25 $4.65
Zone IV $2.92 $3.32 $3.59 $4.10 $4.45 $4.86
Single Family
Tier 1 All Use 0 8 13 HCF 0 8 13 HCF 0 8 12 HCF 0 8 12 H CF 0 8 12 HCF Zone I $2.42 $2.53 $2.74 $3.17 $3.45 $3.78
Zone II $2.51 $2.62 $2.83 $3.27 $3.56 $3.89
Zone III $2.64 $2.69 $2.91 $3.36 $3.65 $3.99
Zone IV $2.92 $2.86 $3.09 $3.54 $3.85 $4.20
Tier 2 All Use > 13 HCF > 13 HCF > 12 HCF > 12 HCF > 12 H CF Zone I $2.42 $4.19 $4.53 $5.24 $5.68 $6.22
Zone II $2.51 $4.28 $4.62 $5.34 $5.79 $6.33
Zone III $2.64 $4.35 $4.70 $5.43 $5.88 $6.43
Zone IV $2.92 $4.52 $4.88 $5.61 $6.08 $6.64
Meter Service, $/meter8month
⅝ x ¾8inch $15.60 $17.50 $18.80 $21.20 $22.90 $24.40
18inch $25.27 $39.30 $42.50 $47.70 $52.00 $55.00
1½8inch $47.74 $74.00 $81.00 $90.00 $98.00 $105.00
28inch $75.62 $117.00 $127.00 $142.00 $155.00 $165.00
38inch $156.77 $217.00 $235.00 $264.00 $287.00 $305.00
48inch $246.73 $359.00 $389.00 $437.00 $475.00 $506.00
68inch $488.45 $715.00 $775.00 $870.00 $946.00 $1,008.00 88inch $725.62 $1,142.00 $1,237.00 $1,390.00 $1,512.00 $1 ,610.00 108inch $1,554.76 $1,640.00 $1,777.00 $1,997.00 $2,171.0 0 $2,312.00 128inch $2,808.34 $2,352.00 $2,548.00 $2,864.00 $3,113.0 0 $3,315.00 Executive Summary Water and Sewer Rates and Capacity Charges Study

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Recommended Sewer Service Charges
Recommended sewer service rates and charges for FY16 – FY20 are listed in the table below. The recommended rates and charges replace the current Sewer Lateral Maintenance charge ($0.31 per month) and Sewer Service charge ($10.75 per month). Recommended uniform charges for Residential users are based on unit costs applicable to all users. The unit costs are used to calculate monthly bills for Nonresidential users.

Table ES 2. Recommended Sewer Service Rates and Charges

Uniform charges for Residential users are based on assigned levels of wastewater discharge volume.

There are three subcategories of Residential users Single Family dwelling units, Multiple Family dwelling units (accounts with two, three or four dwelling units), and dwelling units in apartments and mobile homes in mobile home parks.
"Dwelling unit" means a structure or the part of a structure that is used as a home, residence or sleeping place by one person who maintains a household or by two or more persons who maintain a common household.

For FY15, monthly wastewater discharge volume for single family accounts is 210 gallons per day (gpd).

For multiple family dwelling units monthly wastewater discharge volume is 168 gpd and for dwelling units in apartments and mobile homes in mobile home parks the monthly wastewater discharge volume is 137 gpd. For each year during FY16 – FY20, the monthly wastewater discharge volume for single family accounts is reduced by 2 gallons per day.

Monthly bills for nonresidential users are based on the sum of an account charge plus a charge for the volume of wastewater discharge. The volume of wastewater discharge would be based on metered water use (in units of HCF).

effective dates > 7/1/2015 7/1/2016 7/1/2017 7/1/2018 7/ 1/2019 Service Category Current 2015816 2016817 2017818 2018819 2019820 Unit Costs Applicable to All Users
Account/Dwelling Unit Charge, $/month na $3.53 $3.79 $4 .01 $4.22 $4.44 Volume Rate, $/HCF $0.95 $1.01 $1.07 $1.13 $1.20
Uniform Charges
Residential
Single Family Dwelling Unit, $/month $11.06 $11.60 $12 .20 $12.80 $13.40 $14.00 Multi Family Dwelling Unit, $/month $11.06 $10.10 $10. 80 $11.40 $12.00 $12.70 Apartment/Mobile Home Dwelling Unit, $/month $11.06 $ 8.90 $9.50 $10.00 $10.60 $11.10 Nonresidential
Account Charge, $/month $11.06 $3.53 $3.79 $4.01 $4.22 $4 .44 Volume Rate, $/HCF $0.95 $1.01 $1.07 $1.13 $1.20
Water and Sewer Rates and Capacity Charges Study Executive Summary

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Recommended Water and Sewer Capacity Charges
The capacity charges developed in this study are based on the buyin cost method for valuation of the system. The system buyin method recovers the replacement cost of capacity in those portions of the existing system in which there is capacity available (for example, the transmission, distribution, storage and pumping components of the water system). The buyin method excludes service laterals and meters as these assets do not benefit new users connecting to the water or sewer systems. The value of the water and sewer systems is adjusted to account for contributed capital and assets, near term capital improvements that add capacity and working capital.

Recommended capacity charges for FY16 are listed in the table below. Charges for FY17 and later may be escalated using an appropriate index such as the Engineering News Record 20City Construction Cost Index.

Table ES 3. Recommended Water Capacity Charges

Table ES 4. Recommended Unit Cost of Capacity and Sewer Capacity Charges

Unit Cost, $/gpd Peak Use, gpd Capacity Charge
Single Family Residential Connection $6.16 825 $5,080
Meter Peak
Meter Connection Size Capacity, gpm Equivalency Factor Capacity Charge ⅝ x ¾8inch 15 gpm 1.0 $5,080

1.008inch 38 gpm 2.5 $12,700

1.508inch 75 gpm 5.0 $25,400

2.008inch 120 gpm 8.0 $40,700

3.008inch 225 gpm 15.0 $76,300

4.008inch 375 gpm 25.0 $127,100

6.008inch 750 gpm 50.0 $254,200

8.008inch 1,200 gpm 80.0 $406,700

10.008inch 1,725 gpm 115.0 $584,700

12.008inch 2,475 gpm 165.0 $838,900
Unit Cost of Capacity, $/gallons per day $11.91
Capacity Charges
Residential
gallons per day Capacity Charge
Singe Family 210 $2,500
Multiple Family 168 $2,000
Apartments/Mobile Homes 137 $1,630
Nonresidential gallons per day Capacity Charge
Example 1 210 $2,500
Example 2 630 $7,500
Example 3 2,100 $25,010
Example 4 4,200 $50,020
Example 5 5,250 $62,530
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Section 1
Introduction
This section describes the organization of the report, ratemaking objectives, the ratesetting process, and a general description of the water and wastewater systems.

1.1 Organization of the Report
This report is divided into seven sections. This introduction provides an overview of the study objectives and evaluation of the efficiency of the City’s water and sewer systems compared to those of other similar municipalities.

Section 2 discusses characteristics of customers and their use of the water and sewer systems. The number and type of connections to each system, water use, and wastewater discharge projected for FY15 – FY20 is developed in this section.

Section 3 describes the development of water rates.

Section 4 describes the development of sewer service charges.

Section 5 describes the development of water capacity charges.

Section 6 describes the development of sewer capacity charges.

Section 7 describes the limitations of the study document.

1.2 RateMaking Objectives
There are numerous ratemaking objectives that must be considered when developing rates and rate structures.

Revenue sufficiency. Generate sufficient revenue to fund operating costs, capital costs and bonded debt, and maintain adequate reserves.

Revenue stability. Recover revenue from fixed and variable charges that will cover fixed and variable costs (barring water shortages when rationing may be required).

Conservation signal. Reward customer for efficient water use and discourage its waste.

Administrative efficiency. Enable efficient implementation and ongoing administration, including monitoring and updating.

Affordability. Be as affordable as possible while maintaining the utilities sound financial position and credit rating.

Customer acceptance. Be as simple as possible to facilitate customer understanding and acceptance.

Fairness. Provide for each customer class to pay its proportionate share of the required revenue in compliance with legal ratemaking requirements.

Economic development. Rates must be competitive with local jurisdictions to retain and attract economic development.

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Revenue Requirement Analysis
CostofService Analysis
RateDesign Analysis
Compares revenues of the utility to its
operating and capital costs to
determine the adequacy of the existing
rates to recover costs
Allocates the revenue requirements to
the various customer classes of service
in a fair and equitable manner
Considers both the level and structure
of the rate design to collect the
distributed revenue requirements from
each class of service

1.3 Overview of Utility Rate Setting Process
Rate studies classically have three categories of technical analysis – the development of revenue required from rates, the allocation of costs among functional cost categories (costofservice analysis) and the design of a rate structure. An overview of the ratesetting analytical steps is shown in Figure 11.

The revenue required from rates is net of nonrate
revenues (for example interest earned on fund
balances, loan disbursements and revenue from
new connections to the water system) and other
revenues not required from rates (such as
revenue from meter turn on/off services). The
allocation of costs are structured so that the
revenue required from charges is distributed
proportionally for every level of service in a
manner that allows the development of unit costs.

The rate structure uses the unit costs as a basis
for aggregating costs into rates that are applicable
to the various customer classes.

Figure 11. Overview of Rate Setting Analytical Steps

Information and data for the development of water rates and preparation of this report comes from a number of documents provided by the City. The list of documents, and the key information and data from each used in this study, are summarized below.

City of Antioch Fiscal Year 201415 Adopted Budget . This document shows the recommended FY 2014 15 Annual Budget and FiveYear Capital Improvement Program for the water and wastewater enterprise funds. The City provided a midyear update of the budget with actual values for FY 201314, a revised budget for FY 201415, and projected values for FY201516 and FY201617. Enterprise funds are funded primarily from fees and other user charges.

City of Antioch Municipal Code . Ordinances relating to the water and sewer enterprises are codified in various portions of the Antioch Municipal Code listed below. • Title 3: Finance, Chapter 11: Sewer Capacity Acquisition Fee • Title 6: Sanitation And Health, Chapter 4: Sewer System • Title 6: Sanitation And Health, Chapter 5: Water System • Title 6: Sanitation And Health, Chapter 610: Drought Management Regulations and Water Conservation
City of Antioch 2010 Urban Water Management Plan (UWMP). Dated June 27, 2011, the purpose of the UWMP is to maintain efficient use of urban water supplies, continue to promote conservation programs and policies, ensure that sufficient water supplies are available for future beneficial use, and provide a mechanism for response during water drought conditions. The UWMP evaluates total projected water use be compared to water supply sources in 5year increments over a 20year planning period. Water demand projections from the UWMP were used as a reference for projections shown in this study.

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City of Antioch 2013 Water System Master Plan Update (2013 Water Master Plan). Dated June 2013, the 2013 Water Master Plan reviews changes in water supply, water use characteristics, drinking water regulations, and study area demographics and presents significant Brown and Caldwell (BC) findings, conclusions and recommendations for existing and future facilities through the year 2035.

City of Antioch 2014 Wastewater Collection System Master Plan (2014 Collection System Master Plan). Dated August 2014, the purpose of the 2014 Collection System Master Plan is to update the trunk system capacity assessment and recommended capacity improvement program presented in the City’s 2003 Wastewater Collection System Master Plan to reflect updated land use and flow estimates and sewer projects completed since the 2003 report was developed.

Utility Billing System data. Monthly water use data for each of the City’s metered accounts, for the time period January 2012 through December 2013, were provided in an Excel file. Each account record had descriptive information of the account’s customer class, meter size and elevation pressure zone. The City also generated special reports, such as the Multiple Unit Report, which listed accounts with multiple sewer lateral connections to the collection system.

Department of Water Resources Form 38 Reports. The City submits Form 38 annually to the State of California Department of Water Resources (DWR). This form, titled “Public Water System Statistics”, is used to summarize Active Service Connections, Total Water into the System (production), and Metered Water Deliveries for the City’s Water System.

1.4 Antioch Water Utility
The City of Antioch, incorporated in 1872, is located in the western part of the state and is the second largest city in Contra Costa County. The City of Antioch currently occupies a land area of approximately 29 square miles and serves a population of about 105,117 residents. Antioch’s population grew about

5.9 percent between 2003 and 2013 while the overall Contra Costa County growth rate during this corresponding time period was just shy of 8 percent.

The water system delivers treated water to residential, commercial and irrigation customers. Personnel maintain approximately 339 miles of water main, 31,400 service connections and meters, 2,390 backflow prevention devices, maintain, repair and flush approximately 3,443 fire hydrants, exercise system valves and administers a water conservation program. Personnel staff an alternative work shift and 24hour Standby system that responds to emergency after hour calls for service.

The principal sources of raw water supply are the Sacramento/San Joaquin Rivers Delta and the Contra Costa Water District (CCWD) Canal, which can be stored in the Antioch Municipal Reservoir. Canal water, purchased from CCWD is pumped from Victoria Canal, Rock Slough, and Old River in the western Delta and the Los Vaqueros Reservoir. Even under the most favorable conditions, the city obtains the largest percentage of its raw water from CCWD.

The pipelines from the CCWD Canal to the water treatment plant (WTP) have a capacity over 60 million gallons per day (mgd), well above the maximum predicted future water demand. Water from the Canal can be pumped into the municipal reservoir or directly to the WTP. The WTP has a maximum capacity of about 38 mgd. Treated water flows into two 1.0 million gallon (MG) clearwells before entering the distribution system. In addition to expansion, the City improved water source reliability by purchasing treated water from CCWD produced at the RandallBold Plant (RBP), using a connection to the CCWD multipurpose pipeline at Hillcrest Avenue, and the Diablo Water District (DWD) conveyance system.

The service area extends from steep hilly terrain in the south and west portions of the service area to flat with a gentle slope in the northeast portion of the service area. Elevations in the service area range from sea level to over 700 feet. Generally, the service area is limited to elevations less than 560 feet. Four

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The Antioch distribution system consists of four primary pressure zones. Water pressure typically is maintained between 40 and 100 pounds per square inch gage (psig). 1 Pressure Zone I. Pressure Zone I distribution system serves the older residential sections of the City, the original central business district and some major industrial users. Ground elevations range from sea level to 50 feet. Zone I is served by gravity principally through a 24 inchdiameter main from the WTP.

Pressure reducing valve installations between Zones I and II allows water to flow down to Zone I from Zone II.

Pressure Zone II. Pressure Zone II serves primarily residential and commercial users and has ground elevations ranging from sea level to 170 feet. One area above 170 feet in elevation is supplied by the small Sunset Booster Pump Station. The principal water mains in Zone II are 10, 12, 16, 20, 24 and 30 inches in diameter. The system is supplied by two Zone II Booster Pump Stations – one built in 1967 and one built in 1988, which take suction from the WTP clearwells. There is emergency WTP generator capacity available to operate 58% of the Zone II booster pumps should there be a power outage. Four water storage reservoirs are located in Zone II.

Pressure Zone III East. Pressure Zone III East encompasses much of the newer residential and commercial growth in the City. Zone III East generally extends south from the Canal, with some development north of the canal in the eastern portion of the City. It is bounded on the west by Contra Loma Regional Park and on the east by a Southern Pacific Railroad rightofway. The zone border extends south to the city limits but excludes most of the area south of Lone Tree Way and west of Deer Valley Road. Three Booster Pump Stations, Hillcrest and Lone Tree 1 and 2, and two reservoirs, Hillcrest and Lone Tree, serve Zone III East. Zone III East is served with 12, 16, 20 and 24 inches in diameter water mains.

Pressure Zone III West. Zone III West is a developed residential area on the west side of the City. Most existing development is residential but some commercial development will occur in the western portion of this zone. After the completion of the planned developments at Meadowlands and Black Diamond Ranch, this zone will encompass about 1.25 square miles. It is bound by the Canal, Black Diamond Mines, Contra Loma Regional Park, and the City limits. Zone III West is served by the Donlon Booster Pump Station which fills the Cambridge Reservoir. Water mains of 8, 10, 12 and 16 inches in diameters serve the Zone III West development.

Pressure Zone IV West. The Zone IV West facilities serve to the higher elevations of the Mira Vista Hills Subdivision and the higher elevations in Black Diamond Ranch. The Cambridge Booster Pump Station has emergency power facilities to convey water into Zone IV West and the Mira Vista Hills Reservoir. New 8, 10 and 12 inches in diameter mains serve the Zone IV West development.

Pressure Zone IV East. Zone IV East includes all of the Higgins Ranch and parts of the Dallas Ranch, Black Diamond Knolls, and Diablo West developments. Zone IV East is bound by Contra Loma Regional Park on the west, Zone III East on the north and east, and the proposed new Urban Limit Line on the south. The Dallas Ranch Booster Pump Station serves Zone IV East. The Booster Pump Station conveys water to Zone IV East and to the Empire Mine Reservoir. The reservoir has a capacity of 3.5 MG and an overflow elevation of 510 feet.

1 Text for this section is excerpted from the City of Antioch 2010 Urban Water Management Plan dated June 27, 2011.

Introduction Section 1

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Recent data from the City’s Utility Billing System summarizing the number of meters and water demand, by customer class, are shown in the figures below. The units of water demand shown in the figure (7,930,000 HCF) are equivalent to approximately 16.3 million gallons per day or 5.9 billion gallons per year.

Figure 12. Water Demand (CY13) and Number of Meters by Customer Class (December 2013) Abbreviations – Single (Single Family); Com (Commercial); Inst (Institutional); Irr (Irrigation); Lscp (Landscape)

Recent data from the City’s Utility Billing System summarizing the number of meters by size, is shown in the figure below.

Figure 13. Number of Meters by Size (December 2013)

2013 Metered Water Use = 7,930,000 HCF Meters as of December 2013 = 31,438 Single Family
5,388,837
68%
Multi Family
595,889
8%
Com/Inst
635,139
8%
Industrial
101,649
1%
Lscp/Irr
1,049,682
13%
Other
162,617
2%
Single Family
28,602
91%
Multi Family
688
2%
Com/Inst
788
3%
Industrial
15 0.05%
Lscp/Irr
1,065
3%
Other
280
1%
Other
295
1%
⅝ x ¾inch; 28,113; 90%
1inch; 1,547; 4.9%
1½inch; 190; 0.6%
2inch; 271; 0.9%
3inch; 51; 0.2%
4inch; 22; 0.1%
6inch; 20; 0.1%
8inch; 4; 0.0%
Private Fire; 101; 0.3%
City; 937; 3.0%
Other; 1135; 3.6%
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1.5 Current Water Rates
Water rates are established as allowed in Title 6 (Sanitation and Health), Chapter 5 (Water System) of the Antioch Municipal Code (AMC). Water rates were last increased on July 1, 2014. The City’s current water meter service rates and water use (quantity) rates, are shown in the sidebar below.

Each water account has one or more meters and each meter is billed for metered water use at the rates shown (except fire service accounts which are not billed for water use).

The City has six main categories of user accounts.
• Single Family
• Multiple Family
• Commercial/Institutional
• Industrial
• Landscape
• Irrigation

Service Type Rate
Quantity
$/HCF
Zone I $2.42
Zone II $2.51
Zone III $2.64
Zone IV $2.92
Meter Service
$/meter
⅝ x ¾inch $15.60
1inch $25.27
1½inch $47.74
2inch $75.62
3inch $156.77
4inch $246.73
6inch $488.45
8inch $725.62
10inch $1,554.76
12inch $2,808.44
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1.6 Antioch Sewer Utility
The sewer collection activity is primarily responsible for maintaining an estimated 300 miles of sanitary sewer system lines and approximately 28,250 residential and commercial sewer lateral connections.

This program also performs root foaming, manhole rehabilitation, infiltration control, spot repairs and cleaning of larger trunk lines. Employees in this activity provide a comprehensive program of televising, archiving and benchmarking the overall condition of the sewer system infrastructure. Data from these activities are used to establish maintenance requirements, the need for repairs and development of Capital Improvement Projects. Personnel also assist in staffing an alternative work shift and 24hour Standby system that responds to emergency after hour calls for service.

Pursuant to State Water Resources Control Board Order 20060003, Statewide General Discharge Requirements of Sanitary Sewer Systems the City of Antioch has developed and implemented a Sewer System Management Plan (SSMP). The goal of the SSMP is to minimize the frequency and severity of sanitary sewer overflows. The SSMP covers the management, planning, design, and operation and maintenance of the agency’s sanitary sewer system. The development process began in January 2007 and was completed April 2009 and adopted by Council on April 28, 2009.

Wastewater from the City is collected through the City’s sewer system and is discharged into Delta Diablo’s conveyance system. There are three main connection points between the City system and the Delta Diablo system:
• Bridgehead Pump Station, in the northwest section of the City: Wastewater from the southern part of the City, including Roddy Ranch and Ginocchio future development focus areas, is transported through the Lone Tree Interceptor to the Bridgehead Pump Station. • Fulton Shipyard (Antioch) Pump Station, in the north section of the City: Sewage from the central and northern parts of the City is collected at the Fulton Shipyard Pump Station. Sewage from the Bridgehead Pump Station is conveyed to the Fulton Shipyard Pump Station through a Delta Diablo owned and operated force main and gravity conveyance system. Sewage from the Fulton Shipyard Pump Station is pumped into the Antioch Interceptor and conveyed to the Delta Diablo Wastewater Treatment Plant.
• PittsburgAntioch Interceptor, in the northeast section of the City: In addition to sewage from Pittsburg, sewage from the eastern part of Antioch is conveyed to the Delta Diablo Wastewater Treatment Plant through the PittsburgAntioch Interceptor.

All of the City of Antioch’s collected wastewater is conveyed to the Delta Diablo wastewater treatment plant for processing. Delta Diablo was originally formed in 1976 to protect the health of the public and the environment by collecting and effectively treating wastewater in the communities of Antioch, Bay Point and Pittsburg. Treated effluent is discharged into New York Slough, a section of the San Joaquin River. For Fiscal Year 201415, Delta Diablo charges Antioch residents $290.96 annually on their property taxes.

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Recent data from the City’s Utility Billing System was used to project customer wastewater discharge characteristics for FY15. The number of accounts and dwelling units are shown in the figure below on the right. Wastewater discharge is shown in the figure below on the left. Wastewater discharge for Single Family, Multi Family and Commercial/ Apartments customer classes is based on water use during January and February (annualized to a 12 month value). Wastewater discharge for Institutional and Other customer classes is based on 12 months of metered water use (not including irrigation or fire service meters).

Figure 14. Wastewater Discharge and Number of Accounts/Dwelling Units

1.7 Current Sewer Service Charges
Sewer Service Charges are established as allowed in Title 6 (Sanitation and Health), Chapter 4 (Sewer System) of the Antioch Municipal Code. Sewer Service Charges were last increased on July 1, 2014. The City’s Sewer Service Charges, as described in the City’s Master Fee Sche dule, are listed below:
• Sewer Service $10.75 per month
• Sewer Later Maintenance $0.31 per month per unit

201415 Estimated Wastewater Flow = 3,960,000 HCF 20 1415 Estimated Accounts/Dwelling Units = 36,798 Single Family
2,926,245
74%
Multi Family
245,575
6%
Apartments/
Mobile Homes
249,724
6%
Commercial/
Institutional
407,766
10%
Industrial/Other
132,886
4%
Single Family
28,560
78%
Multi Family
2,996
8%
Apartments/
Mobile Homes
3,736
10%
Commercial/
Institutional
1,446

3.93%
Industrial/Other
60 0.2%
Introduction Section 1

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1.8 Water System Comparison with Comparable Cities
The City’s water system costs and service characteristics were compared with those of three other nearby municipalities with similar populations and water systems.

1.8.1 Comparison of Comprehensive Annual Financial Reports In this exercise similar municipalities were chosen based on location, population served and primary water source. Water fund financial information for FY13 (ending June 30, 2013) was obtained from each jurisdiction’s Comprehensive Annual Financial Report (CAFR) and from the State of California Department of Finance.

The Department of Finance estimated that the City of Antioch had a population of 105,117 as of January 1, 2013. Based on these statistics and geographic location, the following cities were selected as similar municipalities: City of Brentwood, City of Martinez, and the City of Pittsburg.

Revenues and expenditures for each jurisdiction are shown in the table below.

Table 11. Water System Financial Metrics

Antioch Antioch Antioch Antioch Brentwood Brentwood Brentwood Brentwood Martinez Martinez Martinez Martinez Pittsburg Pittsburg Pittsburg Pittsburg Statistics
Population as of January 1, 2013 105,117 53,278 30,488 65,339 Surface Water as % of Total Supply (approximate) 100 % 75% 100% 100% Number of Active Wells Operating Reve nues Operating Reve nues Operating Reve nues Operating Reve nues Charges for Services $25,128,575 $18,441,440 $10,668,120 $18,325,684 Other Revenues $112,890 $216,183 $576,227 $1,342,649
T otal Ope rating Revenues T otal Ope rating Revenues T otal Ope rating Revenues T otal Ope rating Revenues $25 ,24 1,46 5 $25 ,24 1,46 5 $25 ,24 1,46 5 $25 ,24 1,46 5 $ 18,6 57,6 23 $ 18,6 57,6 23 $ 18,6 57,6 23 $ 18,6 57,6 23 $11, 244, 347 $11, 244, 347 $11, 244, 347 $11, 244, 347 $19, 668, 333 $19, 668, 333 $19, 668, 333 $19, 668, 333 Operating Revenue per 2013 Capita $240 $350 $369 $301
Operating Expe nse s Operating Expe nse s Operating Expe nse s Operating Expe nse s Water System Operations $18,353,992 $13,153,649 $8,670 ,144 $12,271,853 Depreciation $4,553,292 $2,970,644 $1,888,290 $1,665,896 T otal Ope rating Expenses T otal Ope rating Expenses T otal Ope rating Expenses T otal Ope rating Expenses $22 ,90 7,28 4 $22 ,90 7,28 4 $22 ,90 7,28 4 $22 ,90 7,28 4 $ 16,1 24,2 93 $ 16,1 24,2 93 $ 16,1 24,2 93 $ 16,1 24,2 93 $10, 558, 434 $10, 558, 434 $10, 558, 434 $10, 558, 434 $13, 937, 749 $13, 937, 749 $13, 937, 749 $13, 937, 749 Operating Expenses per 2013 Capita $218 $303 $346 $213
Operating I ncome (Loss) Operating I ncome (Loss) Operating I ncome (Loss) Operating I ncome (Loss) $2 ,33 4,18 1 $2 ,33 4,18 1 $2 ,33 4,18 1 $2 ,33 4,18 1 $2,5 33,3 30 $2,5 33,3 30 $2,5 33,3 30 $2,5 33,3 30 $ 685, 913 $ 685, 913 $ 685, 913 $ 685, 913 $5, 730, 584 $5, 730, 584 $5, 730, 584 $5, 730, 584 Nonoperating Re venues (Expenses) Nonoperating Re venues (Expenses) Nonoperating Re venues (Expenses) Nonoperating Re venues (Expenses) Interest and Investment Earnings $127,775 $120,150 $42 ,455 $114,747 Interest Expense ($47,995) ($2,839,762) ($305,069) ($1,580,278) Other blank ($23,375) blank ($63,134)
T otal Nonope rating Revenue s T otal Nonope rating Revenue s T otal Nonope rating Revenue s T otal Nonope rating Revenue s $79, 780 $79, 780 $79, 780 $79, 780 ($2, 742, 987) ($2, 742, 987) ($2, 742, 987) ($2, 742, 987) ($262 ,61 4) ($262 ,61 4) ($262 ,61 4) ($262 ,61 4) ($ 1,52 8,6 65) ($ 1,52 8,6 65) ($ 1,52 8,6 65) ($ 1,52 8,6 65) Income (Loss) Before Transfers / Contributions Income (Loss) Before Transfers / Contributions Income (Loss) Before Transfers / Contributions Income (Loss) Before Transfers / Contributions $2,41 3,961 ($209,657) $423,299 $4,201,919 Contributions $1,220,351 $3,349,412 blank $350,014
Net Transfers ($476,760) $107,701 blank ($705,232)
Net I ncome (Loss) Net I ncome (Loss) Net I ncome (Loss) Net I ncome (Loss) $3 ,15 7,55 2 $3 ,15 7,55 2 $3 ,15 7,55 2 $3 ,15 7,55 2 $3,2 47,4 56 $3,2 47,4 56 $3,2 47,4 56 $3,2 47,4 56 $ 423, 299 $ 423, 299 $ 423, 299 $ 423, 299 $3, 846, 701 $3, 846, 701 $3, 846, 701 $3, 846, 701 Net Asse ts Net Asse ts Net Asse ts Net Asse ts
Beginning of year $100,969,273 $115,944,002 $39,154,511 $57,376,239 Ending of year Ending of year Ending of year Ending of year $104 ,12 6,82 5 $104 ,12 6,82 5 $104 ,12 6,82 5 $104 ,12 6,82 5 $1 19,1 91,4 58 $1 19,1 91,4 58 $1 19,1 91,4 58 $1 19,1 91,4 58 $39, 577, 810 $39, 577, 810 $39, 577, 810 $39, 577, 810 $61, 222, 940 $61, 222, 940 $61, 222, 940 $61, 222, 940 Source: Population data is from the State of Califor nia, Department of Finance, E4 Population Estimates for Cities, Counties, and the State, 20112013, with 2010 Census Benchmark; revised May 10, 2013.

Surface water as a percent of total water supply was based on data from each City's website or correspondence with selected City staff.

Financial data is from the Fiscal Year ending June 30, 2013 Comprehensive Annual Financial Report (CAF R) for each City.

Section 1 Introduction

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Each of the four cities exhibits very good water system financial metrics in terms of generating positive Operating Income and Net Income.

1.8.2 Comparison of Water System Efficiency Metrics
Four efficiency metrics were developed to provide an indicator of how costeffective water operations are in Antioch compared to other community systems. They are:
• Operating expenses per full time equivalent employee (FTEE) • Operating expenses per water service connection
• Operating expenses per gallon of water delivered
• Operating expenses per mile of water mains
The efficiency metrics are based on total operating expenditures, as shown in the previous table, and service statistics for FY13 for each City.

Table 12. Water System Efficiency Metrics

The City of Antioch demonstrates the highest efficiency in three of the four metrics. Because the City of Antioch has a lower value for Lineal Feet of Water Mains per Housing Unit, its water system is less concentrated in terms of customer base per mile of water mains and its metric for Operating Expenses per Mile of Water Mains is slightly higher than those of cities with a more concentrated customer base.

Antioch Antioch Antioch Antioch Bre ntwood Bre ntwood Bre ntwood Bre ntwood Martine z Martine z Martine z Martine z Pittsburg Pittsburg Pittsburg Pittsburg Statistics
Population as of January 1, 2013 105,117 53,278 30,488 65,339 Occupied Housing Units as of January 1, 2013 32,649 1 6,827 14,376 19,881 Surface Water as % of Total Supply (approximate) 100 % 75% 100% 100% Water System Operating Expenses, FY 2013 $22,907,284 $16,124,293 $10,558,434 $13,937,749 Efficie ncy Me tric # 1 Efficie ncy Me tric # 1 Efficie ncy Me tric # 1 Efficie ncy Me tric # 1 Numbe r of FT EEs (Full T ime Equivale nt Employe e s) Numbe r of FT EEs (Full T ime Equivale nt Employe e s) Numbe r of FT EEs (Full T ime Equivale nt Employe e s) Numbe r of FT EEs (Full T ime Equivale nt Employe e s) 47. 00 22.52 19.00 27.26 Operating Expenses per FTEE (rounded) $487,400 $716,0 00 $555,700 $511,300 Efficie ncy Me tric # 2 Efficie ncy Me tric # 2 Efficie ncy Me tric # 2 Efficie ncy Me tric # 2 Numbe r of Wate r S e rvice Conne ctions Numbe r of Wate r S e rvice Conne ctions Numbe r of Wate r S e rvice Conne ctions Numbe r of Wate r S e rvice Conne ctions 31,583 17,122 9,76 8 17,664 Operating Expenses per Service Connection (rounded) $725 $940 $1,080 $790 Efficie ncy Me tric # 3 Efficie ncy Me tric # 3 Efficie ncy Me tric # 3 Efficie ncy Me tric # 3 Amount of Wate r De live re d Gallons Amount of Wate r De live re d Gallons Amount of Wate r De live re d Gallons Amount of Wate r De live re d Gallons 6,966,000,000 3,3 48,000,000 1,376,050,000 3,317,850,000 Operating Expenses per Million Gallons $3,288 $4,816 $ 7,673 $4,201 Gallons per Capita (rounded) 66,300 62,800 45,100 50,80 0 Efficie ncy Me tric # 4 Efficie ncy Me tric # 4 Efficie ncy Me tric # 4 Efficie ncy Me tric # 4 Mile s of Wate r Mains Mile s of Wate r Mains Mile s of Wate r Mains Mile s of Wate r Mains 333 256 100 225 Operating Expenses per Mile of Water Mains (rounded ) $68,800 $63,000 $105,600 $61,900 Lineal Feet of Water Mains per Housing Unit 54 80 37 60 Source: 2011 Population and Housing Units data are f rom the State of California, Department of Finance, E5 Population and Housing Estimates for Cities, Counties, and the State, 2011 2013, w ith 2010 Census Benchmark.

Surface water as a percent of total water supply was based on data from each City's website or correspondence with selected City staff.

FTEE, service connection, number of active wells, miles of water mains and water delivery data was provided by Staff from each City or from City reports.

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Section 2
User Characteristics
The purpose of this section is to summarize the identification of residential and nonresidential users and their corresponding water use characteristics. The data used in this section comes from the City’s water use reports, the UWMP and the City’s billing system.

2.1 Historic Water Deliveries
Historical water delivery and service connection data for 2003 through 2013 was provided by the City as shown in its annual report using the Department of Water Resources Form 38 (Public Water System Statistics). Detailed water delivery data for 2012 and 2013 was also provided from the City’s billing system. There are differences in the way the two sets of data are reported and summarized by the City which lead to small differences between the two sets of data. The differences are not material to the development of projected water use. Detailed water delivery and service connection data from Form 38 reports is summarized in Table A1 of Appendix A.

Metered water deliveries by customer class and month for calendar years 2012 and 2013 based on data from the City’s billing system are shown in Figure 21 in units of hundred cubic feet (HCF). Water deliveries for fire service connections and recycled water are not included in the totals.

S Single Family; M Multi Family; C Commercial; N Industrial; L Landscape; I Irrigation; O Other (primarily City accounts) Figure 21. Metered Water Use by Customer Class and Month for 2012 and 2013

Section 2 User Characteristics

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Water deliveries in 2013 were 400,000 HCF greater (approximately 5.4 percent) than in 2012. Most of the increase in water deliveries was due to increased water use during March, April and May by Residential, Landscape and Irrigation customers.

Water delivery projections for FY15 – FY20 are based upon the net impact of two variables: 1) increase in water use due to the growth in the number of metered accounts; and 2) decrease in water use due to conservation. Growth in the number of metered accounts includes approximately 240 single family connections per year. Water use is projected to decline by approximately 16 percent from calendar year 2013 to FY15. Projected water use for FY16 – FY20 is based on a percent reduction from the previous years’ value. Reductions in metered water use for FY16 – FY20 are projected to be 3 percent per year for single family accounts. Reductions in metered water use are projected to be 1 percent per year for all other customer classes. Projected metered water deliveries, by customer class, are shown in the figure below.

Figure 22. Projected Metered Water Use by Customer Class

2.2 Evaluation of Water Use by Pressure Zone
Water use by pressure zone (in units of HCF) is shown below in Figure 23 for 2012 (left) and 2013 (right). Detailed water use by pressure zone is summarized in Table A2 of Appendix A.

Figure 23. Water Use by Pressure Zone

Zone 1
716,415
10%
Zone 2
2,352,365
32%
Zone 3
3,324,520
45%
Zone 4
926,458
13%
Zone 1
720,656
9%
Zone 2
2,375,199
31%
Zone 3
3,625,663
47%
Zone 4
984,007
13%
User Characteristics Section 2

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2.3 Evaluation of Water Use by Block for Single Family Residential Annual average water use is a commonly used as a break point for inclining block rate structures for single family residential accounts. An inclining block rate structure is a schedule of rates applicable to blocks of increasing usage in which the usage in each succeeding block is charged a higher unit rate than in the previous blocks. In this study, a twoblock structure, with the first block including water use equal to or below annual average water use, will be evaluated. Note that the terms “block” and “tier” will be used interchangeably.

Average monthly water use for single family residential accounts for the 24month period ending December 2013 is shown below in Figure 24. The annual average for 2012 was 15.0 HCF per month.

The annual average for 2013 was 15.8 HCF per month.

Figure 24. Single Family Residential Average Monthly Water Use, HCF

Using a first block defined as water use less than or equal to 15 HCF, total water use in each block was calculated for the 24month period ending December 2013 is shown below in Figure 25. On an annual basis, the first block, Tier 1, contains approximately 69 percent of all water use. The next block Tier 2, contains approximately 31 percent of all water use.

Figure 25. Single Family Residential Total Water Use, HCF

Tier breaks for FY16 – FY20 are adjusted to account for water conservation. The price break for the two tiers for FY16 and FY17 is water consumption less than or equal to 13 HCF per month (Tier 1) and greater than 13 HCF per month (Tier 2). The price break drops to 12 HCF for FY18, FY19 and FY20 to reflect projected conservation.

11 10 10 11 12
22 25
20 19
17 15
8 9 10 10
15 18
20 20
23 19 19
13 12
0 2
4 6
8 10
12 14
16 18
20 22
24 26
Jan12 Feb12 Mar12 Apr12 May12 Jun12 Jul12 Aug12 Sep12 Oct12 Nov12 Dec12 Jan13 Feb13 Mar13 Apr13 May13 Jun13 Jul13 Aug13 Sep13 Oct13 Nov13 Dec13 82% 86% 86% 83% 83%
58% 52% 62% 63% 67% 74% 89% 86% 85% 86% 74% 65% 61% 61% 54% 63% 63% 80% 80% 0 100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
Jan12 Feb12 Mar12 Apr12 May12 Jun12 Jul12 Aug12 Sep12 Oct12 Nov12 Dec12 Jan13 Feb13 Mar13 Apr13 May13 Jun13 Jul13 Aug13 Sep13 Oct13 Nov13 Dec13 Tier 1: 3,530,000 CCF, 69%
Tier 2: 1,560,000 CCF, 31%
Tier 1: 3,680,000 CCF, 68%
Tier 2: 1,710,000 CCF, 32%
Section 2 User Characteristics

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2.4 Water Meter Equivalency Factors
Meter charges for meter sizes greater than ⅝ x ¾inch are based, in part, on an "equivalency factor" that relates the design maximum flow capacity of a meter (in gallons per minute, gpm) to that of a standard ⅝ x ¾inch meter. The water meter service charge ratios (equivalency factors) and maximum flow capacity used in this study are shown in the table below and are based on values published by the California Public Utilities Commission Water Division.

The equivalency factors used in the development of current service charges are not known but may be approximated by calculating the ratio of the monthly charges for each meter size in relation to the monthly charge for a ⅝ x ¾inch meter. The implied equivalency factors based on the current service charges are shown in the table below for comparison to those used in this study.

Table 21. Water Meter Equivalency Factors

Recommended Equivalency Factors Current Implied Equivalency Factors Maximum Meter Monthly
Flow Service Charge Service ⅝ x ¾inch
Meter Size Capacity Ratios * Charge Equiv. Factor
⅝ x ¾inch 15 gpm 1.0 $15.60 1.0

1.00inch 38 gpm 2.5 $25.27 1.6

1.50inch 75 gpm 5.0 $47.74 3.1

2.00inch 120 gpm 8.0 $75.62 4.8

3.00inch 225 gpm 15.0 $156.77 10.0

4.00inch 375 gpm 25.0 $246.73 15.8

6.00inch 750 gpm 50.0 $488.45 31.3

8.00inch 1,200 gpm 80.0 $725.62 46.5

10.00inch 1,725 gpm 115.0 $1,554.76 99.7

12.00inch 2,475 gpm 165.0 $2,808.44 180.0
Source: California Public Utilities Commission Water Division, Standard Practice U7W, "Rate Design For Water And Sewer System Utilities I ncluding Master Metered Facilities", July 2006.

User Characteristics Section 2

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2.5 Water Meters
The projected number of water meters, by size, was based on data from the City’s utility billing system as of December 2013. Values from the utility billing system and projections for FY15 through FY20 are shown in the table below.

Table 22. Water Meters

The equivalent number of water meters for FY15 through FY20 are shown in the table below.

Table 23. Equivalent Water Meters

December Projected Fiscal Year
Category 2013 201415 201516 201617 201718 201819 2019 20 Metered Service
⅝ x ¾inch 28,113 28,338 28,563 28,788 29,038 29,288 29,56 3 1inch 1,547 1,547 1,547 1,547 1,547 1,547 1,547
1½inch 190 190 190 190 190 190 190
2inch 271 271 271 271 271 271 271
3inch 51 51 51 51 51 51 51
4inch 22 22 22 22 22 22 22
6inch 20 20 20 20 20 20 20
8inch 4 4 4 4 4 4 4
10inch 0 0 0 0 0 0 0
12inch 0 0 0 0 0 0 0
Total 30,218 30,443 30,668 30,893 31,143 31,393 31,668
Notes:
1 The number of meters and connections as of Decembe r 2013 are from the City's water billing data.

The meter sizes for all "City" customer class accou nts (937) are not listed in the City data base and are assumed to be ⅝, ¾inch. 2 The estimated number of additional meter connectio ns for 201415 onward are projected as shown below. 201415 201516 201617 201718 201819 201920
⅝ x ¾inch 225 225 225 250 250 275
Equivalent Meter Factors Projected Fiscal Year
Category Flow Rate Factors 201415 201516 201617 20171 8 201819 201920 Metered Service
⅝ x ¾inch 15 gpm 1.00 28,338 28,563 28,788 29,038 29,288 2 9,563 1inch 38 gpm 2.53 3,919 3,919 3,919 3,919 3,919 3,919
1½inch 75 gpm 5.00 950 950 950 950 950 950
2inch 120 gpm 8.00 2,168 2,168 2,168 2,168 2,168 2,168 3inch 225 gpm 15.00 765 765 765 765 765 765
4inch 375 gpm 25.00 550 550 550 550 550 550
6inch 750 gpm 50.00 1,000 1,000 1,000 1,000 1,000 1,000 8inch 1,200 gpm 80.00 320 320 320 320 320 320
10inch 1,725 gpm 115.00 0 0 0 0 0 0
12inch 2,475 gpm 165.00 0 0 0 0 0 0
Total 38,010 38,235 38,460 38,710 38,960 39,235
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Section 3
Development of Water Rates
Revenue from water rates must adequately fund water utility operations, capital costs, reserves, and bonded debt related to the provision of water service (if any). The City established Water Fund 611 as a Public Works Enterprise Fund that accounts for the revenues and expenditures related to providing water service through approximately 31,000 service connections throughout Antioch to more than 100,000 consumers. The cost of treating the water, transporting it and maintaining the distribution infrastructure, including 333 miles of mainlines, is also accounted for in this fund. The Water Fund includes the following programs: Water Supervision, Water Production, Water Distribution, Meter Reading, Warehouse & Central Stores, and Capital Projects for the City of Antioch.

A separate fund, the Water Line Expansion Fund 612, is set up to track the development fees collected from developers to fund offsite or oversize facilities in three areas: water storage, plant expansion and other facilities including oversized mains.

3.1 Current Water Rates and Revenue from Rates
Resolution No. 2010/44, which was passed in
June 2010, adopted Water Quantity and Water
Service Charges (Water Rates) effective July 1,
2010. 2 Subsequent increases of eight percent per
year (based on the combined average for all water
rates) were to be effective every July 1 for the next
four years, beginning with FY12.

Resolution No. 2011/58, which was passed in
September 2011, corrected zone surcharge rates
for Zones II, III and IV.

Increases of eight percent, scheduled for July 1,
2012, were not implemented.

Estimated revenue from Water Rates for FY15,
based on rates that went into effect July 1, 2014,
is shown in the adjacent table.

2 The July 1, 2010 increase in Water Rates was based on a study by Black & Veatch consultants.

Water
Service Type Units Rate Revenue %
Quantity CCF $/CCF
Zone I 642,000 $2.42 $1,553,640
Zone II 2,112,000 $2.51 $5,301,120
Zone III 3,086,000 $2.64 $8,147,040
Zone IV 850,000 $2.92 $2,482,000
Subtotal 6,690,000 $17,483,800
73%
Meter Service meters $/meter
⅝ x ¾0inch 28,338 $15.60 $5,304,874
10inch 1,547 $25.27 $469,112
1½0inch 190 $47.74 $108,847
20inch 271 $75.62 $245,916
30inch 51 $156.77 $95,943
40inch 22 $246.73 $65,137
60inch 20 $488.45 $117,228
80inch 4 $725.62 $34,830
Subtotal 30,443 $6,441,887
27%
Total $23,925,687 100%
Section 3 Development of Water Rates

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3.2 Projected Expenditures and Funding Sources
Budgeted and projected expenditures and the sources of funds (water rates, other operating and nonoperating revenues and use of fund balance) are described in this section.

3.2.1 Projected Expenditures
Budgeted and projected expenditures are shown in the table below. All actual and budgeted expenditure values were provided by the City. Projected operating expenditures are based on annual escalation rates provided by the City.

Table 31. Water Fund 611 Budgeted and Projected Expenditures

Budget Budget Proj.

Actual Revised Proposed Cost Projected
Expense Category Notes 2013014 2014015 2015016 Esc. 2016017 2017018 2018019 2019020 Ope r at in g E x pe nse s Ope r at in g E x pe nse s Ope r at in g E x pe nse s Ope r at in g E x pe nse s [1] Supervision 2,594,183 3,225,907 3,243,751 4% 3,374,000 3,509,000 3,649,000 3,795,000 Production, Serv & Supl 13,577,773 16,498,063 17,119,7 40 4% 17,805,000 18,517,000 19,258,000 20,028,000 Production, Personnel 1,361,298 1,593,540 1,749,820 4% 1,820,000 1,893,000 1,969,000 2,048,000 Distribution 4,757,074 5,967,086 6,336,539 4% 6,590,000 6,854,000 7,128,000 7,413,000 Meter Reading 312,205 535,952 801,467 5% 684,000 718,000 754,000 792,000 Warehouse/Stores 400,032 488,713 511,164 5% 537,000 564,000 592,000 622,000 Tot al Ope r a t i ng Tot al Ope r a t i ng Tot al Ope r a t i ng Tot al Ope r a t i ng 2 3 ,0 0 2 ,5 6 5 2 3 ,0 0 2 ,5 6 5 2 3 ,0 0 2 ,5 6 5 2 3 ,0 0 2 ,5 6 5 2 8 ,3 0 9 ,2 6 0 2 8 ,3 0 9 ,2 6 0 2 8 ,3 0 9 ,2 6 0 2 8 ,3 0 9 ,2 6 0 2 9 ,7 6 2 ,4 8 1 2 9 ,7 6 2 ,4 8 1 2 9 ,7 6 2 ,4 8 1 2 9 ,7 6 2 ,4 8 1 3 0 ,8 1 0 ,0 0 0 3 0 ,8 1 0 ,0 0 0 3 0 ,8 1 0 ,0 0 0 3 0 ,8 1 0 ,0 0 0 3 2 ,0 5 5 ,0 0 0 3 2 ,0 5 5 ,0 0 0 3 2 ,0 5 5 ,0 0 0 3 2 ,0 5 5 ,0 0 0 3 3 ,3 5 0 ,0 0 0 3 3 ,3 5 0 ,0 0 0 3 3 ,3 5 0 ,0 0 0 3 3 ,3 5 0 ,0 0 0 3 4 ,6 9 8 ,0 0 0 3 4 ,6 9 8 ,0 0 0 3 4 ,6 9 8 ,0 0 0 3 4 ,6 9 8 ,0 0 0 Capi t a l Ex pe nse s Capi t a l Ex pe nse s Capi t a l Ex pe nse s Capi t a l Ex pe nse s [1] Personnel 37,488 122,790 124,060 4% 129,000 134,000 139,000 145,000 Projects 1,633,243 2,612,450 1,160,000 varies 2,790,000 3,090,000 3,240,000 3,320,000 Tot al Ca pit al Tot al Ca pit al Tot al Ca pit al Tot al Ca pit al 1 ,6 7 0 ,7 3 1 1 ,6 7 0 ,7 3 1 1 ,6 7 0 ,7 3 1 1 ,6 7 0 ,7 3 1 2 ,7 3 5 ,2 4 0 2 ,7 3 5 ,2 4 0 2 ,7 3 5 ,2 4 0 2 ,7 3 5 ,2 4 0 1 ,2 8 4 ,0 6 0 1 ,2 8 4 ,0 6 0 1 ,2 8 4 ,0 6 0 1 ,2 8 4 ,0 6 0 2 ,9 1 9 ,0 0 0 2 ,9 1 9 ,0 0 0 2 ,9 1 9 ,0 0 0 2 ,9 1 9 ,0 0 0 3 ,2 2 4 ,0 0 0 3 ,2 2 4 ,0 0 0 3 ,2 2 4 ,0 0 0 3 ,2 2 4 ,0 0 0 3 ,3 7 9 ,0 0 0 3 ,3 7 9 ,0 0 0 3 ,3 7 9 ,0 0 0 3 ,3 7 9 ,0 0 0 3 ,4 6 5 ,0 0 0 3 ,4 6 5 ,0 0 0 3 ,4 6 5 ,0 0 0 3 ,4 6 5 ,0 0 0 Capi t a l Re se r v e Capi t a l Re se r v e Capi t a l Re se r v e Capi t a l Re se r v e [2] 0 0 00 0 0 00 0 0 00 varies 00 00 0 0 00 0 0 00 1 ,0 0 0 ,0 0 0 1 ,0 0 0 ,0 0 0 1 ,0 0 0 ,0 0 0 1 ,0 0 0 ,0 0 0 Tot al E x pe ndi t ur e s Tot al E x pe ndi t ur e s Tot al E x pe ndi t ur e s Tot al E x pe ndi t ur e s 2 4 ,6 7 3 ,2 9 6 2 4 ,6 7 3 ,2 9 6 2 4 ,6 7 3 ,2 9 6 2 4 ,6 7 3 ,2 9 6 3 1 ,0 4 4 ,5 0 0 3 1 ,0 4 4 ,5 0 0 3 1 ,0 4 4 ,5 0 0 3 1 ,0 4 4 ,5 0 0 3 1 ,0 4 6 ,5 4 1 3 1 ,0 4 6 ,5 4 1 3 1 ,0 4 6 ,5 4 1 3 1 ,0 4 6 ,5 4 1 3 3 ,7 2 9 ,0 0 0 3 3 ,7 2 9 ,0 0 0 3 3 ,7 2 9 ,0 0 0 3 3 ,7 2 9 ,0 0 0 3 5 ,2 7 9 ,0 0 0 3 5 ,2 7 9 ,0 0 0 3 5 ,2 7 9 ,0 0 0 3 5 ,2 7 9 ,0 0 0 3 6 ,7 2 9 ,0 0 0 3 6 ,7 2 9 ,0 0 0 3 6 ,7 2 9 ,0 0 0 3 6 ,7 2 9 ,0 0 0 3 9 ,1 6 3 ,0 0 0 3 9 ,1 6 3 ,0 0 0 3 9 ,1 6 3 ,0 0 0 3 9 ,1 6 3 ,0 0 0 1 All data was provided by the City.

The 2015016 budget for Meter Reading includes $150, 000 for a one0time equipment purchase. Projected va lues for 2016017 and beyond exclude that amount. 2 The Capital Reserve fund is for the accumulation o f funds for future Capital Projects.

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3.2.2 Projected Source of Funds
The City plans to fund its projected operating and capital expenditures through a mix of revenues from water rates, and other operating and nonoperating revenues and use of fund balance.

The table below shows how the City plans to fund projected capital expenditures.

Table 32. Source of Funds for Capital Expenditures

The table below summarizes how the City plans to fund all water Fund 611 expenditures. Note the use of fund balance as a source of revenues.

Table 33. Source of Funds for All Projected Water Fund 611 Expenditures

Projected Five0Year
Item 2015016 2016017 2017018 2018019 2019020 Total
C apit al Pr oject s C apit al Pr oject s C apit al Pr oject s C apit al Pr oject s FY16 0 FY20 CIP Specific 3,810,000 5,390,000 3,890,000 4,040,000 4,120,000 21,250,000 T ot al Capit al Pr oje ct s T ot al Capit al Pr oje ct s T ot al Capit al Pr oje ct s T ot al Capit al Pr oje ct s 3 ,8 1 0 ,0 0 0 3 ,8 1 0 ,0 0 0 3 ,8 1 0 ,0 0 0 3 ,8 1 0 ,0 0 0 5 ,3 9 0 ,0 0 0 5 ,3 9 0 ,0 0 0 5 ,3 9 0 ,0 0 0 5 ,3 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,1 2 0 ,0 0 0 4 ,1 2 0 ,0 0 0 4 ,1 2 0 ,0 0 0 4 ,1 2 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 F und S our ce F und S our ce F und S our ce F und S our ce Fund 611 Rates 1,160,000 2,790,000 3,090,000 3,240,000 3,320,000 13,600 ,000 Fund 612 Capacity Charges 2,650,000 2,600,000 800,000 8 00,000 800,000 7,650,000 T ot al F und S our ce s T ot al F und S our ce s T ot al F und S our ce s T ot al F und S our ce s 3 ,8 1 0 ,0 0 0 3 ,8 1 0 ,0 0 0 3 ,8 1 0 ,0 0 0 3 ,8 1 0 ,0 0 0 5 ,3 9 0 ,0 0 0 5 ,3 9 0 ,0 0 0 5 ,3 9 0 ,0 0 0 5 ,3 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 3 ,8 9 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,0 4 0 ,0 0 0 4 ,1 2 0 ,0 0 0 4 ,1 2 0 ,0 0 0 4 ,1 2 0 ,0 0 0 4 ,1 2 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 2 1 ,2 5 0 ,0 0 0 Projected Five0Year
Expense Category 2015016 2016017 2017018 2018019 2019020 Total Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s Supervision 3,244,000 3,374,000 3,509,000 3,649,000 3,79 5,000 17,571,000 Production, Serv & Supl 17,120,000 17,805,000 18,517,0 00 19,258,000 20,028,000 92,728,000 Production, Personnel 1,750,000 1,820,000 1,893,000 1,9 69,000 2,048,000 9,480,000 Distribution 6,337,000 6,590,000 6,854,000 7,128,000 7,4 13,000 34,322,000 Meter Reading 801,000 684,000 718,000 754,000 792,000 3,7 49,000 Warehouse/Stores 511,000 537,000 564,000 592,000 622,000 2,826,000 Capital Expenses (Cash) 1,284,000 2,919,000 3,224,000 3 ,379,000 3,465,000 14,271,000 Capital Reserve 0 0 0 0 1,000,000 1,000,000
Debt Service 0 0 0 0 0 0
Total Expenditures 31,047,000 33,729,000 35,279,000 36, 729,000 39,163,000 175,947,000 Add / (Use ) F und Balance Add / (Use ) F und Balance Add / (Use ) F und Balance Add / (Use ) F und Balance (3 ,0 0 0 ,0 0 0 ) (3 ,0 0 0 ,0 0 0 ) (3 ,0 0 0 ,0 0 0 ) (3 ,0 0 0 ,0 0 0 ) (3 ,8 0 0 ,0 0 0 ) (3 ,8 0 0 ,0 0 0 ) (3 ,8 0 0 ,0 0 0 ) (3 ,8 0 0 ,0 0 0 ) (1 ,4 3 0 ,0 0 0 ) (1 ,4 3 0 ,0 0 0 ) (1 ,4 3 0 ,0 0 0 ) (1 ,4 3 0 ,0 0 0 ) (4 5 0 ,0 0 0 ) (4 5 0 ,0 0 0 ) (4 5 0 ,0 0 0 ) (4 5 0 ,0 0 0 ) (2 6 0 ,0 0 0 ) (2 6 0 ,0 0 0 ) (2 6 0 ,0 0 0 ) (2 6 0 ,0 0 0 ) (8 ,9 4 0 ,0 0 0 ) (8 ,9 4 0 ,0 0 0 ) (8 ,9 4 0 ,0 0 0 ) (8 ,9 4 0 ,0 0 0 ) R e v e nue R e quir e d fr om Wat e r R at e s R e v e nue R e quir e d fr om Wat e r R at e s R e v e nue R e quir e d fr om Wat e r R at e s R e v e nue R e quir e d fr om Wat e r R at e s 2 8 ,0 4 7 ,0 0 0 2 8 ,0 4 7 ,0 0 0 2 8 ,0 4 7 ,0 0 0 2 8 ,0 4 7 ,0 0 0 2 9 ,9 2 9 ,0 0 0 2 9 ,9 2 9 ,0 0 0 2 9 ,9 2 9 ,0 0 0 2 9 ,9 2 9 ,0 0 0 3 3 ,8 4 9 ,0 0 0 3 3 ,8 4 9 ,0 0 0 3 3 ,8 4 9 ,0 0 0 3 3 ,8 4 9 ,0 0 0 3 6 ,2 7 9 ,0 0 0 3 6 ,2 7 9 ,0 0 0 3 6 ,2 7 9 ,0 0 0 3 6 ,2 7 9 ,0 0 0 3 8 ,9 0 3 ,0 0 0 3 8 ,9 0 3 ,0 0 0 3 8 ,9 0 3 ,0 0 0 3 8 ,9 0 3 ,0 0 0 1 6 7 ,0 0 7 ,0 0 0 1 6 7 ,0 0 7 ,0 0 0 1 6 7 ,0 0 7 ,0 0 0 1 6 7 ,0 0 7 ,0 0 0 Section 3 Development of Water Rates

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3.3 Base – Extra Capacity Cost Allocation
Allocation of functional costs to cost components is performed using the “baseextra capacity” method.

Using this method, costs are separated into six cost components. Each component is described below. 3

1. Base costs – costs that tend to vary with the total quantity of water used plus those O&M expenses and capital costs associated with service to customer under average demand conditions;

2. Extracapacity costs – costs associated with meeting peak demand rate of use requirements in excess of average (base) use and include O&M expenses and capital costs for system capacity beyond that required average rate of use; these costs are subdivided into costs necessary to meet maximumday extra demand and maximumhour demand in excess of maximumday demand;

3. Customer costs – costs associated with serving customers, irrespective of the amount or rate of water use; these costs are subdivided into costs for meter reading and billing, customer accounting and collection, and financial reporting; and maintenance and capital costs related to customer meters and services;

4. Fire protection – costs that apply solely to the fire protection function; these costs include those directly related to public fire hydrants and related branches and mains; and private fire protection costs.

3.4 Allocation of Costs to Functional Categories
The total amount of revenue required from water rates and charges (costs) is allocated between amounts to be recovered from meter service and quantity charges. Allocation is accomplished by the development of factors that allocate costs among six functional cost categories.

The functional cost categories and the allocations are based on principles and methodology found in the American Water Works Association Manual of Water Supply Practices, M1 Principles of Water Rates, Fees, and Charges . The use of these industry standard principles and methods ensures that revenue requirements are equitably recovered from classes of customers in proportion to the cost of serving those customers.

The general cost of service process includes the following steps:

1. Identification of annual revenue requirements by function;

2. Allocation of functional costs to cost components (which may include annual water usage, peak water demand, customer meters and bills, and fire protection);

3. Development of units of service by customer class for each cost component;

4. Development of unit costs of service for each cost component; and

5. Distribution of costs to customer classes.

3 A more complete discussion of functional cost categories as they apply to the baseextra capacity method may be found in the American Water Works Association, Manual of Water Supply Practices, M1 Principles of Water Rates, Fees, and Charges , 2012 Sixth Edition, page 62.

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The development of cost allocation percentages for the base year are shown in detail in Appendix B, Tables B1 (“Plant in Service” cost allocation factors and B2 (cost allocation percentages for the base year). Allocation of revenue required from rates to functional cost categories are summarized in the table below.

Table 34. Allocation of Costs to Functional Categories

Projected
Item 2015016 2016017 2017018 2018019 2019020
Revenue Required from Water Rates $28,047,000 $29,929 ,000 $33,849,000 $36,279,000 $38,903,000 Allocations [1]
Percent base year
Base 41.4% 41.4% 41.1% 41.1% 40.9% 40.9%
Extra Capacity 26.4% 26.4% 26.2% 26.2% 25.9% 25.9%
Electricity (Zones II, III & IV) 4.7% 4.7% 4.7% 4.7% 4.7% 4.7% Fire Protection 11.9% 11.9% 12.2% 12.2% 12.4% 12.4%
Service Laterals/Meters 11.4% 11.4% 11.6% 11.6% 11.9% 11.9% Customer/Billing 4.2% 4.2% 4.2% 4.2% 4.2% 4.2%
Dollars
Base $11,610,000 $12,314,000 $13,927,000 $14,836,000 $15,909 ,000 Extra Capacity $7,415,000 $7,837,000 $8,864,000 $9,410, 000 $10,090,000 Electricity (Zones I, II, III & IV) $1,306,000 $1,394 ,000 $1,577,000 $1,690,000 $1,812,000 Fire Protection $3,338,000 $3,636,000 $4,113,000 $4,499 ,000 $4,824,000 Service Laterals/Meters $3,193,000 $3,482,000 $3,938,0 00 $4,311,000 $4,623,000 Customer/Billing $1,186,000 $1,265,000 $1,431,000 $1,53 4,000 $1,645,000 Notes:
1 Allocations for 2015016 onward are adjusted to inc orporate reduction in water use due to conservation . 2015016 2016017 2017018 2018019 2019020
Commodity 0.00% 00.25% 0.00% 00.25% 0.00%
Capacity 0.00% 00.25% 0.00% 00.25% 0.00%
Electricity (Zones II, III & IV) no change no change n o change no change no change Fire Protection 0.00% 0.25% 0.00% 0.25% 0.00%
Service Laterals/Meters 0.00% 0.25% 0.00% 0.25% 0.00%
Customer/Billing no change no change no change no chang e no change Section 3 Development of Water Rates

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3.5 Water Rate and Charges Unit Costs
Allocation of revenue required from rates to functional cost categories shown in the previous table is merged with units of service shown in Section 2 to develop unit costs of service.

Table 35. Water Rates and Charges Unit Costs

Projected
Allocation Category 2015016 2016017 2017018 2018019 2019020 Revenue Requirement $28,047,000 $29,929,000 $33,849,000 $36,279,000 $38,903 ,000 Base
Revenue Allocation $11,610,000 $12,314,000 $13,927,000 $14,836,000 $15,909 ,000 Units of Use (HCF) 6,550,000 6,410,000 6,270,000 6,140,000 6,010,000 Avg Base Rate ($/HCF) $1.77 $1.92 $2.22 $2.42 $2.65
Extra Capacity
Revenue Allocation $7,415,000 $7,837,000 $8,864,000 $9,410,000 $10,090,000 Units of Use (HCF) 6,550,000 6,410,000 6,270,000 6,140,000 6,010,000 Avg Extra Capacity Rate ($/HCF) $1.13 $1.22 $1.41 $1.53 $1.68 Electricity (Zones I, II, III & IV)
Revenue Allocation $1,306,000 $1,394,000 $1,577,000 $1,690,000 $1,812,000 Units of Use (HCF) 6,550,000 6,410,000 6,270,000 6,140,000 6,010,000 Avg Zones I/ II/III/IV Rate ($/HCF) $0.20 $0.22 $0.25 $0.28 $0.30 Public Fire Protection
Revenue Allocation $3,338,000 $3,636,000 $4,113,000 $4,499,000 $4,824,000 Units of Use (equivalent meters) 38,235 38,460 38,710 38,960 39,235 Publc Fire Protection Rate ($/eq. mtr0month) $7.28 $7 .88 $8.85 $9.62 $10.25 Meters/Service Laterals
Revenue Allocation $3,193,000 $3,482,000 $3,938,000 $4,311,000 $4,623,000 Units of Use (equivalent meters) 38,235 38,460 38,710 38,960 39,235 Meter/Lateral Rate ($/eq. mtr0month) $6.96 $7.54 $8.48 $9.22 $9.82 Customer
Revenue Allocation $1,186,000 $1,265,000 $1,431,000 $1,534,000 $1,645,000 Units of Use (accounts) 30,668 30,893 31,143 31,393 31,668 Account Rate ($/acct0month) $3.22 $3.41 $3.83 $4.07 $4.33 Development of Water Rates Section 3

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3.6 Recommended Water Rates and Charges
The unit costs shown in the previous table are used to develop recommended water rates and charges.

Tables showing detailed rate and charges calculation are included in Appendix C: Elevation Zone rates (Table C1), Uniform Quantity rates (Table C2), Single Family Inclining Block rates (Table C3), Meter Service charges (Table C4) and Private Fire Protection charges (Table C5 and Table C6).

Recommended water rates and charges are listed in the table below.

Table 36. Recommended Water Rates and Charges

effective dates > 7/1/2015 7/1/2016 7/1/2017 7/1/2018 7/ 1/2019 Service Category Current 2015016 2016017 2017018 2018019 2019020 2015016 2016017 2017018 2018019 2019020 Quantity Rates, $/HCF HCF = hundred cubic feet (748 gallons) Non0Single Family
Zone I $2.42 $2.99 $3.24 $3.73 $4.05 $4.44 24% 8% 15% 9% 10% Zone II $2.51 $3.08 $3.33 $3.83 $4.16 $4.55 23% 8% 15% 9% 9% Zone III $2.64 $3.15 $3.41 $3.92 $4.25 $4.65 19% 8% 15% 8% 9% Zone IV $2.92 $3.32 $3.59 $4.10 $4.45 $4.86 14% 8% 14% 9% 9% Single Family
Tier 1 All Use 0 0 13 HCF 0 0 13 HCF 0 0 12 HCF 0 0 12 H CF 0 0 12 HCF Zone I $2.42 $2.53 $2.74 $3.17 $3.45 $3.78 na 8% 16% 9% 10% Zone II $2.51 $2.62 $2.83 $3.27 $3.56 $3.89 na 8% 16% 9% 9% Zone III $2.64 $2.69 $2.91 $3.36 $3.65 $3.99 na 8% 15% 9% 9% Zone IV $2.92 $2.86 $3.09 $3.54 $3.85 $4.20 na 8% 15% 9% 9% Tier 2 All Use > 13 HCF > 13 HCF > 12 HCF > 12 HCF > 12 H CF Zone I $2.42 $4.19 $4.53 $5.24 $5.68 $6.22 na 8% 16% 8% 10% Zone II $2.51 $4.28 $4.62 $5.34 $5.79 $6.33 na 8% 16% 8% 9% Zone III $2.64 $4.35 $4.70 $5.43 $5.88 $6.43 na 8% 16% 8% 9% Zone IV $2.92 $4.52 $4.88 $5.61 $6.08 $6.64 na 8% 15% 8% 9% Meter Service, $/meter0month
⅝ x ¾0inch $15.60 $17.50 $18.80 $21.20 $22.90 $24.40 12% 7% 13% 8% 7% 10inch $25.27 $39.30 $42.50 $47.70 $52.00 $55.00 56% 8% 12% 9 % 6% 1½0inch $47.74 $74.00 $81.00 $90.00 $98.00 $105.00 55% 9% 11 % 9% 7% 20inch $75.62 $117.00 $127.00 $142.00 $155.00 $165.00 55% 9 % 12% 9% 6% 30inch $156.77 $217.00 $235.00 $264.00 $287.00 $305.00 38% 8% 12% 9% 6% 40inch $246.73 $359.00 $389.00 $437.00 $475.00 $506.00 46% 8% 12% 9% 7% 60inch $488.45 $715.00 $775.00 $870.00 $946.00 $1,008.00 4 6% 8% 12% 9% 7% 80inch $725.62 $1,142.00 $1,237.00 $1,390.00 $1,512.00 $1 ,610.00 57% 8% 12% 9% 6% 100inch $1,554.76 $1,640.00 $1,777.00 $1,997.00 $2,171.0 0 $2,312.00 5% 8% 12% 9% 6% 120inch $2,808.34 $2,352.00 $2,548.00 $2,864.00 $3,113.0 0 $3,315.00 016% 8% 12% 9% 6% Section 3 Development of Water Rates

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3.7 Revenue from Water Rates and Charges
The impact of cost of service allocations upon the amount of revenue from each category of rates and charges is summarized in the table below.

Table 37. Revenue by Rate/Charge Category

2014015 Projected Five0Year
Service Type Current 2015016 2016017 2017018 2018019 2019 020 Total Quantity
Zone I $1,554,812 $1,880,828 $1,994,525 $2,246,016 $2,38 8,141 $2,562,677 $11,072,187 Zone II $5,303,329 $6,371,486 $6,741,414 $7,584,292 $8,0 66,970 $8,636,437 $37,400,598 Zone III $8,143,571 $9,513,421 $10,078,532 $11,332,833 $ 12,032,120 $12,885,827 $55,842,733 Zone IV $2,481,852 $2,762,780 $2,923,610 $3,266,016 $3,4 71,325 $3,710,886 $16,134,617 Total $17,483,565 $20,528,515 $21,738,081 $24,429,157 $2 5,958,556 $27,795,827 $120,450,136 Meter Service
⅝ x ¾0inch $5,304,874 $5,998,230 $6,494,573 $7,387,267 $ 8,048,342 $8,656,046 $36,584,459 10inch $469,112 $729,565 $788,970 $885,503 $965,328 $1,02 1,020 $4,390,386 1½0inch $108,847 $168,720 $184,680 $205,200 $223,440 $239 ,400 $1,021,440 20inch $245,916 $380,484 $413,004 $461,784 $504,060 $536, 580 $2,295,912 30inch $95,943 $132,804 $143,820 $161,568 $175,644 $186,6 60 $800,496 40inch $65,137 $94,776 $102,696 $115,368 $125,400 $133,58 4 $571,824 60inch $117,228 $171,600 $186,000 $208,800 $227,040 $241, 920 $1,035,360 80inch $34,830 $54,816 $59,376 $66,720 $72,576 $77,280 $33 0,768 100inch $0 $0 $0 $0 $0 $0 $0
100inch $0 $0 $0 $0 $0 $0 $0
Total $6,441,887 $7,730,995 $8,373,119 $9,492,210 $10,34 1,830 $11,092,490 $47,030,645 Totals
Dollars
Quantity Charges $17,483,565 $20,528,515 $21,738,081 $2 4,429,157 $25,958,556 $27,795,827 $120,450,136 Meter Charges $6,441,887 $7,730,995 $8,373,119 $9,492,2 10 $10,341,830 $11,092,490 $47,030,645 Total $23,925,452 $28,259,510 $30,111,200 $33,921,367 $3 6,300,386 $38,888,318 $167,480,781 Percent
Quantity Charges 73% 73% 72% 72% 72% 71%
Meter Charges 27% 27% 28% 28% 28% 29%
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3.8 Water Fund 611 Projected Cash Flow
The projected cash flow for FY15 – FY20 is shown in the table below. Note the use of fund balance to mitigate the level of rate increases.

Table 38. Water Fund 611 Projected Cash Flow

Budget Projected Five0Year
Items Notes 2014015 2015016 2016017 2017018 2018019 201902 0 Total Be gi nning Bal ance , July 1 Be gi nning Bal ance , July 1 Be gi nning Bal ance , July 1 Be gi nning Bal ance , July 1 [1] 22,504,000 15,729,000 13, 252,000 9,985,000 8,962,000 8,863,000 R e v enues R e v enues R e v enues R e v enues
Charges for Services 23,925,000 28,260,000 30,111,000 3 3,921,000 36,300,000 38,888,000 167,480,000 Warehouse/Stores 265,000 280,000 280,000 280,000 280,000 280,000 1,400,000 Investment Income [2] 75,000 25,000 66,000 50,000 45,000 4 4,000 230,000 Other 5,000 5,000 5,000 5,000 5,000 5,000 25,000
Loan Disbursement 0 0 0 0 0 0 0
Total Revenues 24,270,000 28,570,000 30,462,000 34,256, 000 36,630,000 39,217,000 169,135,000 Ex pendit ur e s Ex pendit ur e s Ex pendit ur e s Ex pendit ur e s Supervision 3,226,000 3,244,000 3,374,000 3,509,000 3,64 9,000 3,795,000 17,571,000 Production, Serv & Supl 16,498,000 17,120,000 17,805,0 00 18,517,000 19,258,000 20,028,000 92,728,000 Production, Personnel 1,594,000 1,750,000 1,820,000 1,8 93,000 1,969,000 2,048,000 9,480,000 Distribution 5,967,000 6,337,000 6,590,000 6,854,000 7,1 28,000 7,413,000 34,322,000 Meter Reading 536,000 801,000 684,000 718,000 754,000 792 ,000 3,749,000 Warehouse/Stores 489,000 511,000 537,000 564,000 592,000 622,000 2,826,000 Additional Staffing 0 0 0 0 0 0 0
Capital Expenses 2,735,000 1,284,000 2,919,000 3,224,00 0 3,379,000 3,465,000 14,271,000 Capital Reserve 0 0 0 0 0 1,000,000 1,000,000
Debt Service 0 0 0 0 0 0 0
Total Expenditures 31,045,000 31,047,000 33,729,000 35, 279,000 36,729,000 39,163,000 175,947,000 Ne t R ev e nue Ne t R ev e nue Ne t R ev e nue Ne t R ev e nue (6,775,000) (2,477,000) (3,267,000) (1,023, 000) (99,000) 54,000 (6,812,000) Ending Balance , June 3 0 Ending Balance , June 3 0 Ending Balance , June 3 0 Ending Balance , June 3 0 15,729,000 13,252,000 9,985,00 0 8,962,000 8,863,000 8,917,000 1 The beginning balance for FY 2014015 was provided by the City. 2 Interest income for FY 2015016 onward is based on the interest rates listed below times the beginning fund balance. 2015016 2016017 2017018 2018019 2019020

0.5% 0.5% 0.5% 0.5% 0.5%
Section 3 Development of Water Rates

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3.9 Water Fund 611 Target Balances
Projected target cash levels for Water Fund 611 are shown in the table below. Operating targets are based on a minimum of 90 days to a maximum of 180 days of annual operation expenses.

Table 39. Water Fund 611 Projected Target Balances

Projected target cash levels for Water Fund 611 and Water Fund 612 are shown in the figure below along with the minimum and maximum target ending balance levels for Water Fund 611.

Figure 3.1. Projected Cash for Water Fund 611 and Water Fund 612

Budgeted Projected
Item Notes 2014015 2015016 2016017 2017018 2018019 2019020 Operating Expenses 28,310,000 29,763,000 30,810,000 32, 055,000 33,350,000 34,698,000 Lower Target Ending Balance [1] 6,981,000 7,339,000 7,5 97,000 7,904,000 8,223,000 8,556,000 Higher Target Ending Balance [1] 13,961,000 14,678,000 15,194,000 15,808,000 16,447,000 17,111,000 Ending Balances 15,729,000 13,252,000 9,985,000 8,962,0 00 8,863,000 8,917,000 Amount Over (Under) Lower Target 8,748,000 5,913,000 2 ,388,000 1,058,000 640,000 361,000 Amount Over (Under) Higher Target 1,768,000 (1,426,00 0) (5,209,000) (6,846,000) (7,584,000) (8,194,000) 1 Targets are based on 90 days to 180 days of annual operation expenses.

Five0Year Capital Project Expenditures =$21,250,000
15,729,000
13,252,000
9,985,000 8,962,000 8,863,000 8,917,000
1,000,000
4,050,000
2,550,000
1,130,000
1,660,000 2,230,000
2,970,000
0 2,000,000
4,000,000
6,000,000
8,000,000
10,000,000
12,000,000
14,000,000
16,000,000
18,000,000
20,000,000
22,000,000
2014015 2015016 2016017 2017018 2018019 2019020
Ending Fund 612
Balances
Ending Capital
Reserve Fund
Ending Fund 611
Balances
180 Days Cash
Target 611 Balance
90 Days Cash
Target 611 Balance
Ending Balance 0
611 + 612 +
Reserve
Development of Water Rates Section 3

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3.10 Single Family Residential Monthly Water Bills
Historical and projected (for FY16 – FY20) monthly water bills for Single Family Residential accounts are shown in the figure below. Detailed water bills at levels of monthly water use from 0 HCF to 50 HCF are shown in Tables D1 (current rates versus recommended FY16 rates with uniform quantity charges), D2 (current rates versus recommended FY16 rates with inclining block quantity charges), D3 (summary of Table D1) and D4 (summary of Table D2) in Appendix D.

Figure 3.2. Historic and Projected Monthly Single Family Water Bills, FY9 – FY20 Monthly bills are for a ⅝ x ¾0inch meter connection in Zone II with water consumption of 15 HCF per month during FY9 – FY15, 13 HCF per month during FY16 and FY17 and 12 HCF per month during FY18, FY19 and FY20

3.11 Residential Monthly Water Bills Surveys
Monthly water bills for Single Family users were compared to those for other agencies. The comparison was for a user with the smallest meter size using 13 HCF of water per month in Zone II. Results of the survey are shown in the figure below.

Figure 3.3. Single Family Monthly Water Bills Survey
$35.00 $37.90
$42.40
$47.34 $47.34 $50.27 $53.25
$57.54
$62.09
$67.16
$72.82
$79.00
$51.56
$55.59
$60.44
$65.62
$71.08
8% 12% 12% 0% 6% 6% 8.1% 7.9% 8.2% 8.4% 8.5%

03.2% 7.8% 8.7% 8.6% 8.3%
$0
$10
$20
$30
$40
$50
$60
$70
$80
$90
$100
2008009 2009010 2010011 2011012 2012013 2013014 2014015 20 15016 2016017 2017018 2018019 2019020 Historic Monthly Water Bills
Recommended Monthly Water Bills (Uniform)
Recommended Monthly Water Bills (Inclining Block)
Annual % Change in Monthly Bills (Uniform)
Annual % Change in Monthly Bills, Inclining Block
Base d on 1 3 HCF/month (3 2 0 g allons pe r day) wate r use Base d on 1 3 HCF/month (3 2 0 g allons pe r day) wate r use Base d on 1 3 HCF/month (3 2 0 g allons pe r day) wate r use Base d on 1 3 HCF/month (3 2 0 g allons pe r day) wate r use $15.60 $17.50 $17.50 $20.85 $22.68 $26.76
$32.63 $34.06 $40.04 $31.63
$40.93
$45.67
$48.23 $51.56
$57.54
$52.48
$63.61
$72.43
$0
$10
$20
$30
$40
$50
$60
$70
$80
$90
$100
Antioch
Current
Antioch
FY16 Tiers
Antioch
FY16 Uniform
Brentwood
FY16
Pittsburg
FY16
CCWD
FY15
Quantity
Meter
This Page Intentionally Blank.

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Section 4
Development of Sewer Service
Charges
Sewer Service Charges must adequately fund sewer utility operations, capital costs, and reserves. The City established Sewer Fund 621 as an Enterprise Fund that accounts for the revenues and expenditures related to providing wastewater collection, storm drain and channel maintenance services for the City of Antioch. A separate fund, Sewer Facility Expansion Fund 622, is set up to track the development fees collected from developers to fund offsite or to oversize sewer facilities and replace inadequate sewers.

4.1 Current Sewer Service Charges and Revenue from Charges Resolution No. 2010/45, which was passed in June 2010, adopted Sewer Service Charges effective July 1, 2010.4 At that time, charges increased four percent, from $9.46 per month to $9.84 per month.

Subsequent increases were
effective on July 1, 2011 (four
percent) and July 1, 2013 (four
percent).

The current Sewer Service
Charge for all units is a fixed
sum of $11.06 per month.

Estimated revenue from Sewer
Service Charges for FY15 is
shown in the adjacent table.

4 The July 1, 2010 increase in Sewer Service Charges was based on a study by Black & Veatch consultants.

Sewer Service Charge [1]
Customer Class Accounts Units $/monthunit Revenue
Single Family 28,560 28,560 $11.06 $3,790,483
78%
Multi Family 613 2,996 $11.06 $397,629 8%
Apartments/Mobile Homes 74 3,736 $11.06 $495,842 10%
Commercial 700 1,396 $11.06 $185,277 4%
Churches/Housing Authority 7 50 $11.06 $6,636 0.14%
Industrial 11 13 $11.06 $1,725 0.04%
Other 47 47 $11.06 $6,238 0.13%
T otal T otal T otal T otal 3 0 , 0 1 2 3 0 , 0 1 2 3 0 , 0 1 2 3 0 , 0 1 2 3 6, 7 9 8 3 6, 7 9 8 3 6, 7 9 8 3 6, 7 9 8 $ 4 , 8 8 3 , 8 3 1 $ 4 , 8 8 3 , 8 3 1 $ 4 , 8 8 3 , 8 3 1 $ 4 , 8 8 3 , 8 3 1 1 0 0 % 1 0 0 % 1 0 0 % 1 0 0 % 1 Sum of the Sewer Service ($10.75) and the Sewer La teral Maintenance ($0.31) charges.

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4.2 Methodology for Determination of Updated Sewer Service Charges Calculation of a Sewer Service Charge is a series of simple mathematical operations. Defining the wastewater characteristics and revenue requirements required for those operations are more complex and represent a major emphasis in this report. Basic steps for the development of Sewer Service Charges are summarized below. The methodology of computing Sewer Service Charges conforms with the State Water Resources Control Board (SWRCB) Revenue Program Guidelines for Wastewater Agencies , 1998 edition.

Define revenue required from Sewer Service Charges. The City’s operating budget, projected capital expenditures and target levels of reserve funds are used to project total annual expenditures and revenues required from Sewer Service Charges.

Define user wastewater system characteristics. User characteristics for each customer are characterized in terms annual wastewater discharge and number of residential dwelling units or number of nonresidential accounts.5
Develop unit costs. The annual amount of revenue required from Sewer Service Charges is allocated between revenue to be recovered from a charge that is the same for all dwelling units and accounts and a charge that is the same for each HCF of wastewater discharge. Revenue recovered from dwelling units and accounts is divided by the total number of dwelling units and accounts to yield a unit cost ($/dwelling unitaccount). Revenue recovered from HCF is divided by HCF of wastewater discharge to yield a unit cost ($/HCF).

Develop revenue required from each customer class. The amount of revenue required from each customer class is the unit cost for dwelling units and accounts ($/dwelling unitaccount) times the number of dwelling units or accounts plus the unit cost for per HCF ($/HCF) times the wastewater discharge for each customer class.

Develop Sewer Service Charges for each customer class. The amount of revenue required from each customer class is recovered by a uniform charge for each residential customer class and by a combination of a uniform charge and a flowbased charge for nonresidential customers.

5 "Dwelling unit" means a structure or the part of a structure that is used as a home, residence, or sleeping place by one person who maintains a household or by two or more persons who maintain a common household. See California Civil Code Section 19401954.1.

Development of Sewer Service Charges Section 4

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4.3 Sewer Fund 621 Projected Expenditures
Budgeted and projected expenditures are shown in the table below. Budgeted expenditures for FY15 were provided by the City. Projected operating expenditures are based on annual escalation rates provided by the City. Projected capital expenditures were provided by the City.

Revenues from the current level of Sewer Service Charges are sufficient to fund only projected operating expenditures (the operating fund balance would remain at approximately the current level). Increases in the Sewer Service Charges and use of fund balance are required to generate approximately $7.0 million for capital expenditures.

The list of expenditures includes a line item for Capital Reserves. Capital Reserves are for expenditures for capital projects related to an emergency or unplanned repair and replacement project.

Table 41. Sewer Fund 621 Budgeted and Projected Expenditures

Budget Budget Proj.

Revised Proposed Cost Projected Fiscal Year FiveYear
Expense Category Notes 201415 201516 Esc. 201617 201718 201819 201920 Total Ope r at ing Ex pe nse s Ope r at ing Ex pe nse s Ope r at ing Ex pe nse s Ope r at ing Ex pe nse s [1] Supervision 1,533,778 1,515,000 3% 1,560,000 1,607,000 1,655,000 1,705,000 8,042,000 Collection 4,355,196 4,279,000 2% 4,365,000 4,452,000 4,541,000 4,632,000 22,269,000 Tot al Ope r at i ng Tot al Ope r at i ng Tot al Ope r at i ng Tot al Ope r at i ng 5 ,8 8 8 ,9 7 4 5 ,8 8 8 ,9 7 4 5 ,8 8 8 ,9 7 4 5 ,8 8 8 ,9 7 4 5 ,7 9 4 ,0 0 0 5 ,7 9 4 ,0 0 0 5 ,7 9 4 ,0 0 0 5 ,7 9 4 ,0 0 0 5 ,9 2 5 ,0 0 0 5 ,9 2 5 ,0 0 0 5 ,9 2 5 ,0 0 0 5 ,9 2 5 ,0 0 0 6 ,0 5 9 ,0 0 0 6 ,0 5 9 ,0 0 0 6 ,0 5 9 ,0 0 0 6 ,0 5 9 ,0 0 0 6 ,1 9 6 ,0 0 0 6 ,1 9 6 ,0 0 0 6 ,1 9 6 ,0 0 0 6 ,1 9 6 ,0 0 0 6 ,3 3 7 ,0 0 0 6 ,3 3 7 ,0 0 0 6 ,3 3 7 ,0 0 0 6 ,3 3 7 ,0 0 0 3 0 ,3 1 1 ,0 0 0 3 0 ,3 1 1 ,0 0 0 3 0 ,3 1 1 ,0 0 0 3 0 ,3 1 1 ,0 0 0 Capi t al Ex pe nse s Capi t al Ex pe nse s Capi t al Ex pe nse s Capi t al Ex pe nse s [1] Personnel 130,456 135,950 3% 140,000 144,000 148,000 152,000 719,950 Projects 1,575,000 1,250,000 varies 1,250,000 1,250,000 1,250,000 1,250,000 6,250,000 Tot al C apit al Tot al C apit al Tot al C apit al Tot al C apit al 1 ,7 0 5 ,4 5 6 1 ,7 0 5 ,4 5 6 1 ,7 0 5 ,4 5 6 1 ,7 0 5 ,4 5 6 1 ,3 8 5 ,9 5 0 1 ,3 8 5 ,9 5 0 1 ,3 8 5 ,9 5 0 1 ,3 8 5 ,9 5 0 1 ,3 9 0 ,0 0 0 1 ,3 9 0 ,0 0 0 1 ,3 9 0 ,0 0 0 1 ,3 9 0 ,0 0 0 1 ,3 9 4 ,0 0 0 1 ,3 9 4 ,0 0 0 1 ,3 9 4 ,0 0 0 1 ,3 9 4 ,0 0 0 1 ,3 9 8 ,0 0 0 1 ,3 9 8 ,0 0 0 1 ,3 9 8 ,0 0 0 1 ,3 9 8 ,0 0 0 1 ,4 0 2 ,0 0 0 1 ,4 0 2 ,0 0 0 1 ,4 0 2 ,0 0 0 1 ,4 0 2 ,0 0 0 6 ,9 6 9 ,9 5 0 6 ,9 6 9 ,9 5 0 6 ,9 6 9 ,9 5 0 6 ,9 6 9 ,9 5 0 Capi t al R e se r v e s Capi t al R e se r v e s Capi t al R e se r v e s Capi t al R e se r v e s [2] 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 varies 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 1 0 0 ,0 0 0 5 0 0 ,0 0 0 5 0 0 ,0 0 0 5 0 0 ,0 0 0 5 0 0 ,0 0 0 Tot al Ex pe ndit ur e s Tot al Ex pe ndit ur e s Tot al Ex pe ndit ur e s Tot al Ex pe ndit ur e s 7 ,5 9 4 ,4 3 0 7 ,5 9 4 ,4 3 0 7 ,5 9 4 ,4 3 0 7 ,5 9 4 ,4 3 0 7 ,2 7 9 ,9 5 0 7 ,2 7 9 ,9 5 0 7 ,2 7 9 ,9 5 0 7 ,2 7 9 ,9 5 0 7 ,4 1 5 ,0 0 0 7 ,4 1 5 ,0 0 0 7 ,4 1 5 ,0 0 0 7 ,4 1 5 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,8 3 9 ,0 0 0 7 ,8 3 9 ,0 0 0 7 ,8 3 9 ,0 0 0 7 ,8 3 9 ,0 0 0 3 7 ,7 8 0 ,9 5 0 3 7 ,7 8 0 ,9 5 0 3 7 ,7 8 0 ,9 5 0 3 7 ,7 8 0 ,9 5 0 1 All data was provided by the City.
2 The Capital Reserve fund is for the accumulation o f funds for future Capital Projects.

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4.4 Residential Dwelling Units and Wastewater Discharge The current Sewer Service Charge is assessed on the number of units associated with an account. As part of the process of developing Sewer Service Charges, the concept of a dwelling unit is defined and the method of assigning units to each account is described. "Dwelling unit" means a structure or the part of a structure that is used as a home, residence or sleeping place by one person who maintains a household or by two or more persons who maintain a common household.

Water meter read data for single family accounts revealed that average wastewater discharge was approximately 210 gpd during February and March of 2011 (8.5 hundred cubic feet per month – one hundred cubic foot equals approximately 748 gallons).

Water meter read data for multiple family accounts (accounts with two, three or four dwelling units) and for apartments and mobile homes in mobile home parks was also evaluated. Based on the available data, it is estimated that average wastewater discharge for multiple family dwelling units is 168 gpd and average wastewater discharge for dwelling units in apartments and mobile homes in mobile home parks is 137 gpd.

Wastewater Discharge for residential dwelling units is summarized in the table below.

Table 42. Wastewater Discharge for Residential Dwelling Units

Single Multiple Apartments/
Unit of Measure Family Family Mobile Homes
Average Annual gallons per day 210 168 137
Average Annual hundred cubic feet per month 8.5 6.8 5. 6 Development of Sewer Service Charges Section 4

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4.5 Total Wastewater Discharge
Current and projected annual wastewater discharge for each customer class is shown in the table below.

The additional number of accounts and dwelling units for FY16 onward is projected to average approximately 240 per year.

Table 43. Current and Projected Wastewater Discharge

Estimated Projected Fiscal Year
Customer Class 201415 201516 201617 201718 201819 20 1920 Wastewater Discharge, HCF [1]
Single Family 2,926,245 2,914,757 2,902,728 2,892,631 2, 881,934 2,873,048 Multi Family 245,575 245,575 245,575 245,575 245,575 245, 575 Apartments/Mobile Homes 249,724 249,724 249,724 249,724 249,724 249,724 Commercial/Institutional 407,766 399,611 395,615 391,65 8 387,742 383,864 Industrial 121,781 101,649 100,633 99,626 98,630 97,644 Other 11,105 11,105 10,994 10,884 10,775 10,667
Total, HCF 3,962,196 3,922,420 3,905,268 3,890,099 3,874 ,380 3,860,523 Total, million gallons 2,964 2,934 2,922 2,910 2,898 2,88 8 Total, gallons per day (round to 1,000) 8,121,000 8,0 17,000 8,004,000 7,973,000 7,941,000 7,891,000 Accounts/Dwelling Units [1]
Single Family Dwelling Units 28,560 28,785 29,010 29,26 0 29,510 29,785 Multi Family Dwelling Units 2,996 2,996 2,996 2,996 2,99 6 2,996 Apartment/Mobile Home Dwelling Units 3,736 3,736 3,736 3,736 3,736 3,736 Commercial/Institutional 1,446 1,446 1,446 1,446 1,446 1, 446 Industrial 13 13 13 13 13 13
Other 47 47 47 47 47 47
Total 36,798 37,023 37,248 37,498 37,748 38,023
Notes:
1 Wastewater discharge and accounts/dwelling units d ata is from Table E1.

Section 4 Development of Sewer Service Charges

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4.6 Revenue Required from Sewer Service Charges
The annual amount of revenue required Sewer Service Charges is shown in the table below. Fund balance is used in each year to meet a portion of capital expenses or increase the capital reserve.

Table 44. Source of Funds for All Projected Sewer Fund 621 Expenditures

4.7 Allocation of Costs to Functional Categories
Allocation of revenue required from Sewer Service Charges to functional cost categories are summarized in the table below.

Table 45. Allocation of Revenue Required to Functional Categories

Expense Category 201516 201617 201718 201819 201920 Total Operating Expenses
Supervision $1,515,000 $1,560,000 $1,607,000 $1,655,000 $1,705,000 $8,042,000 Collection $4,279,000 $4,365,000 $4,452,000 $4,541,000 $ 4,632,000 $22,269,000 Capital Expenses $1,385,950 $1,390,000 $1,394,000 $1,39 8,000 $1,402,000 $6,969,950 Capital Reserve $100,000 $100,000 $100,000 $100,000 $100 ,000 $500,000 Add / (Use) Fund Balance ($1,980,000) ($1,760,000) ($1 ,580,000) ($1,400,000) ($1,200,000) ($7,920,000) T otal Expe nditure s T otal Expe nditure s T otal Expe nditure s T otal Expe nditure s $ 5, 2 9 9, 9 50 $ 5, 2 9 9, 9 50 $ 5, 2 9 9, 9 50 $ 5, 2 9 9, 9 50 $5 , 6 55 , 0 00 $5 , 6 55 , 0 00 $5 , 6 55 , 0 00 $5 , 6 55 , 0 00 $5 , 97 3 , 00 0 $5 , 97 3 , 00 0 $5 , 97 3 , 00 0 $5 , 97 3 , 00 0 $ 6, 29 4, 0 0 0 $ 6, 29 4, 0 0 0 $ 6, 29 4, 0 0 0 $ 6, 29 4, 0 0 0 $6 , 6 39 , 0 00 $6 , 6 39 , 0 00 $6 , 6 39 , 0 00 $6 , 6 39 , 0 00 $ 29 , 86 0 , 95 0 $ 29 , 86 0 , 95 0 $ 29 , 86 0 , 95 0 $ 29 , 86 0 , 95 0 Expense Category 201516 201617 201718 201819 201920 Total Allocation, %
Allocation % Accounts/Units
Supervision 100% 100% 100% 100% 100%
Collection 5% 5% 5% 5% 5%
Capital Expenses 33% 31% 31% 30% 29%
Capital Reserves 33% 31% 31% 30% 29%
Add / (Use) Fund Balance 33% 31% 31% 30% 29%
Allocation % Flow
Supervision 0% 0% 0% 0% 0%
Collection 95% 95% 95% 95% 95%
Capital Expenses 67% 69% 69% 70% 71%
Capital Reserves 67% 69% 69% 70% 71%
Add / (Use) Fund Balance 67% 69% 69% 70% 71%
Allocation Summary, $
AccountsUnits $1,567,781 $1,693,347 $1,803,257 $1,911, 354 $2,024,694 $9,000,433 Flow $3,732,169 $3,961,653 $4,169,743 $4,382,646 $4,614, 306 $20,860,517 T otal T otal T otal T otal $ 5 , 29 9, 95 0 $ 5 , 29 9, 95 0 $ 5 , 29 9, 95 0 $ 5 , 29 9, 95 0 $ 5, 6 5 5, 0 0 0 $ 5, 6 5 5, 0 0 0 $ 5, 6 5 5, 0 0 0 $ 5, 6 5 5, 0 0 0 $ 5, 9 73 , 0 00 $ 5, 9 73 , 0 00 $ 5, 9 73 , 0 00 $ 5, 9 73 , 0 00 $6 , 2 94 , 0 00 $6 , 2 94 , 0 00 $6 , 2 94 , 0 00 $6 , 2 94 , 0 00 $6 , 6 39 , 00 0 $6 , 6 39 , 00 0 $6 , 6 39 , 00 0 $6 , 6 39 , 00 0 $2 9 , 86 0, 95 0 $2 9 , 86 0, 95 0 $2 9 , 86 0, 95 0 $2 9 , 86 0, 95 0 Allocation Summary, %
Accounts 30% 30% 30% 30% 30%
Flow 70% 70% 70% 70% 70%
Development of Sewer Service Charges Section 4

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4.8 Calculation of Unit Costs
Sewer Service Charges will have two unit cost components – an account charge that is the same for every account or unit and a flow charge for every hundred cubic feet of wastewater discharge.

Calculation of the unit costs is shown in the table below.

Table 46. Calculation of Unit Costs

Expense Category 201516 201617 201718 201819 201920 Allocat ion, $ Allocat ion, $ Allocat ion, $ Allocat ion, $ Accounts/Dwelling Units $1,567,781 $1,693,347 $1,803,2 57 $1,911,354 $2,024,694 Flow $3,732,169 $3,961,653 $4,169,743 $4,382,646 $4,614,306 T ot al T ot al T ot al T ot al $ 5 ,2 9 9 ,9 5 0 $ 5 ,2 9 9 ,9 5 0 $ 5 ,2 9 9 ,9 5 0 $ 5 ,2 9 9 ,9 5 0 $ 5 ,6 5 5 ,0 0 0 $ 5 ,6 5 5 ,0 0 0 $ 5 ,6 5 5 ,0 0 0 $ 5 ,6 5 5 ,0 0 0 $ 5 ,9 7 3 ,0 0 0 $ 5 ,9 7 3 ,0 0 0 $ 5 ,9 7 3 ,0 0 0 $ 5 ,9 7 3 ,0 0 0 $ 6 ,2 9 4 ,0 0 0 $ 6 ,2 9 4 ,0 0 0 $ 6 ,2 9 4 ,0 0 0 $ 6 ,2 9 4 ,0 0 0 $ 6 ,6 3 9 ,0 0 0 $ 6 ,6 3 9 ,0 0 0 $ 6 ,6 3 9 ,0 0 0 $ 6 ,6 3 9 ,0 0 0 Account /Unit C ost Account /Unit C ost Account /Unit C ost Account /Unit C ost Cost Allocation, $ $1,567,781 $1,693,347 $1,803,257 $1,911,354 $2,024,694 Accounts/Dwelling Units 37,023 37,248 37,498 37,748 38,0 23 Unit C ost , $ /Account Unit /mont h Unit C ost , $ /Account Unit /mont h Unit C ost , $ /Account Unit /mont h Unit C ost , $ /Account Unit /mont h $ 3 .5 3 $ 3 .5 3 $ 3 .5 3 $ 3 .5 3 $ 3 .7 9 $ 3 .7 9 $ 3 .7 9 $ 3 .7 9 $ 4 .0 1 $ 4 .0 1 $ 4 .0 1 $ 4 .0 1 $ 4 .2 2 $ 4 .2 2 $ 4 .2 2 $ 4 .2 2 $ 4 .4 4 $ 4 .4 4 $ 4 .4 4 $ 4 .4 4 F low Unit C ost F low Unit C ost F low Unit C ost F low Unit C ost Cost Allocation, $ $3,732,169 $3,961,653 $4,169,743 $4,382,646 $4,614,306 Flow, HCF 3,922,420 3,905,268 3,890,099 3,874,380 3,860,523 Unit C ost , $ /HC F Unit C ost , $ /HC F Unit C ost , $ /HC F Unit C ost , $ /HC F $ 0 .9 5 $ 0 .9 5 $ 0 .9 5 $ 0 .9 5 $ 1 .0 1 $ 1 .0 1 $ 1 .0 1 $ 1 .0 1 $ 1 .0 7 $ 1 .0 7 $ 1 .0 7 $ 1 .0 7 $ 1 .1 3 $ 1 .1 3 $ 1 .1 3 $ 1 .1 3 $ 1 .2 0 $ 1 .2 0 $ 1 .2 0 $ 1 .2 0 Section 4 Development of Sewer Service Charges

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4.9 Revenue Required from Each Customer Class
Each unit cost is multiplied by the number of accounts or units and wastewater discharge for each customer class to determine the amount of revenue required from each customer class. Calculation of the amount of revenue required from each customer class is shown in the table below.

Table 47. Calculation of Revenue Required from Customer Classes

Expense Category 201516 201617 201718 201819 201920 Unit C ost s Unit C ost s Unit C ost s Unit C ost s Account/Dwelling Unit, $/accountdwelling unit/month $3.53 $3.79 $4.01 $4.22 $4.44 Flow, $/HCF $0.95 $1.01 $1.07 $1.13 $1.20
R e v e nue R e quir e d fr om C har g e s R e v e nue R e quir e d fr om C har g e s R e v e nue R e quir e d fr om C har g e s R e v e nue R e quir e d fr om C har g e s Account/Dwelling Unit Costs
Number of Accounts/Dwelling Units
Single Family 28,785 29,010 29,260 29,510 29,785
Multi Family 2,996 2,996 2,996 2,996 2,996
Apartments/Mobile Homes 3,736 3,736 3,736 3,736 3,736
Commercial/Institutional 1,446 1,446 1,446 1,446 1,446
Industrial 13 13 13 13 13
Other 47 47 47 47 47
Total 37,023 37,248 37,498 37,748 38,023
Revenue Required
Single Family $1,218,934 $1,318,836 $1,407,097 $1,494,227 $1,586,027 Multi Family $126,869 $136,202 $144,076 $151,701 $159,535 Apartments/Mobile Homes $158,205 $169,844 $179,662 $189 ,171 $198,939 Commercial/Institutional $61,233 $65,737 $69,537 $73,21 8 $76,998 Industrial $550 $591 $625 $658 $692
Other $1,990 $2,137 $2,260 $2,380 $2,503
Total $1,567,781 $1,693,347 $1,803,257 $1,911,354 $2,024,694 Flow Costs
Wastewater Discharge
Single Family 2,914,757 2,902,728 2,892,631 2,881,934 2,873,048 Multi Family 245,575 245,575 245,575 245,575 245,575
Apartments/Mobile Homes 249,724 249,724 249,724 249,724 249,724 Commercial/Institutional 399,611 395,615 391,658 387,74 2 383,864 Industrial 101,649 100,633 99,626 98,630 97,644
Other 11,105 10,994 10,884 10,775 10,667
Total 3,922,420 3,905,268 3,890,099 3,874,380 3,860,523 Revenue Required
Single Family $2,773,380 $2,944,638 $3,100,571 $3,260,004 $3,434,023 Multi Family $233,664 $249,121 $263,229 $277,791 $293,525 Apartments/Mobile Homes $237,612 $253,330 $267,676 $282 ,485 $298,484 Commercial/Institutional $380,228 $401,327 $419,813 $43 8,608 $458,816 Industrial $96,719 $102,085 $106,788 $111,569 $116,709
Other $10,566 $11,153 $11,666 $12,189 $12,750
Total $3,732,169 $3,961,653 $4,169,743 $4,382,646 $4,614,306 R e v e nue R e quir e me nt S ummar y R e v e nue R e quir e me nt S ummar y R e v e nue R e quir e me nt S ummar y R e v e nue R e quir e me nt S ummar y Single Family $3,992,314 $4,263,474 $4,507,667 $4,754,231 $5,020,050 Multi Family $360,533 $385,323 $407,304 $429,492 $453,059 Apartments/Mobile Homes $395,817 $423,174 $447,338 $471 ,655 $497,423 Commercial/Institutional $441,461 $467,064 $489,351 $51 1,826 $535,814 Industrial $97,269 $102,676 $107,413 $112,227 $117,401
Other $12,557 $13,289 $13,927 $14,568 $15,253
Total $5,299,950 $5,655,000 $5,973,000 $6,294,000 $6,639,000 Development of Sewer Service Charges Section 4

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4.10 Development of Sewer Service Charges
Calculation of sewer service charges for each customer class is shown in the table below.

Table 48. Development of Sewer Service Charges

Customer Category 201516 201617 201718 201819 201920 R e v e nue R e quir e d R e v e nue R e quir e d R e v e nue R e quir e d R e v e nue R e quir e d Single Family $3,992,314 $4,263,474 $4,507,667 $4,754,231 $5,020,050 Multi Family $360,533 $385,323 $407,304 $429,492 $453,059 Apartments/Mobile Homes $395,817 $423,174 $447,338 $471 ,655 $497,423 Commercial/Institutional $441,461 $467,064 $489,351 $51 1,826 $535,814 Industrial $97,269 $102,676 $107,413 $112,227 $117,401
Other $12,557 $13,289 $13,927 $14,568 $15,253
Total $5,299,950 $5,655,000 $5,973,000 $6,294,000 $6,639,000 S e we r S e r v ice C har g e s S e we r S e r v ice C har g e s S e we r S e r v ice C har g e s S e we r S e r v ice C har g e s Single Family
Cost Allocation $3,992,314 $4,263,474 $4,507,667 $4,754 ,231 $5,020,050 Number of Dwelling Units 28,785 29,010 29,260 29,510 29, 785 Rate, $/dwelling unit/month $11.60 $12.20 $12.80 $13.40 $14.00 Multiple Family
Cost Allocation $360,533 $385,323 $407,304 $429,492 $453,059 Number of Dwelling Units 2,996 2,996 2,996 2,996 2,996
Rate, $/dwelling unit/month $10.10 $10.80 $11.40 $12.00 $12.70 Apartments/Mobile Homes
Cost Allocation $395,817 $423,174 $447,338 $471,655 $497,423 Number of Dwelling Units 3,736 3,736 3,736 3,736 3,736
Rate, $/dwelling unit/month $8.90 $9.50 $10.00 $10.60 $1 1.10 Nonresidential
Account Rate
Account Cost Allocation $63,773 $68,465 $72,423 $76,256 $80,193 Number of Accounts 1,506 1,506 1,506 1,506 1,506
Rate, $/account/month $3.53 $3.79 $4.01 $4.22 $4.44
Flow Rate
Cost Allocation $487,513 $514,565 $538,267 $562,366 $588 ,275 Wastewater Discharge, HCF 512,365 507,241 502,169 497,1 47 492,175 Rate, $/HCF $0.95 $1.01 $1.07 $1.13 $1.20
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4.11 Recommended Sewer Service Charges
Recommended sewer service rates and charges for FY16 – FY20 are listed in the table below. The recommended rates and charges replace the current Sewer Lateral Maintenance charge ($0.31 per month) and Sewer Service charge ($10.75 per month). Recommended uniform charges for Residential users are based on unit costs applicable to all users. The unit costs are used to calculate monthly bills for Nonresidential users.

Table 49. Recommended Sewer Service Rates and Charges

Uniform charges for Residential users are based on assigned levels of wastewater discharge volume.

For FY15, monthly wastewater discharge volume for single family accounts is 210 gallons per day (gpd).

effective dates > 7/1/2015 7/1/2016 7/1/2017 7/1/2018 7/ 1/2019 Service Category Current 201516 201617 201718 201819 201920 Unit Costs Applicable to All Users
Account/Dwelling Unit Charge, $/month na $3.53 $3.79 $4 .01 $4.22 $4.44 Volume Rate, $/HCF $0.95 $1.01 $1.07 $1.13 $1.20
Uniform Charges
Residential
Single Family Dwelling Unit, $/month $11.06 $11.60 $12 .20 $12.80 $13.40 $14.00 Multi Family Dwelling Unit, $/month $11.06 $10.10 $10. 80 $11.40 $12.00 $12.70 Apartment/Mobile Home Dwelling Unit, $/month $11.06 $ 8.90 $9.50 $10.00 $10.60 $11.10 Nonresidential
Account Charge, $/month $11.06 $3.53 $3.79 $4.01 $4.22 $4.44 Volume Rate, $/HCF $0.95 $1.01 $1.07 $1.13 $1.20
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4.12 Sewer Fund 621 Projected Cash Flow
The projected cash flow for FY15 – FY20 is shown in the table below.

Table 410. Sewer Fund 621 Projected Cash Flow

Revised Proposed
Budget Budget Projected Fiscal Year FiveYear
Items Notes 201415 201516 201617 201718 201819 20192 0 Total Be g i nni ng Bala nce , J ul y 1 Be g i nni ng Bala nce , J ul y 1 Be g i nni ng Bala nce , J ul y 1 Be g i nni ng Bala nce , J ul y 1 [1] 13,065,000 10,373,000 8,4 46,000 6,729,000 5,184,000 3,811,000 Re v e n ue s Re v e n ue s Re v e n ue s Re v e n ue s Charges for Services 4,859,000 5,300,000 5,655,000 5,97 3,000 6,294,000 6,639,000 29,861,000 Investment Income [2] 42,000 52,000 42,000 34,000 26,000 1 9,000 173,000 Other 1,000 1,000 1,000 1,000 1,000 1,000 5,000
T ot al Re v e n ue s T ot al Re v e n ue s T ot al Re v e n ue s T ot al Re v e n ue s 4 ,9 0 2 ,0 0 0 4 ,9 0 2 ,0 0 0 4 ,9 0 2 ,0 0 0 4 ,9 0 2 ,0 0 0 5 ,3 5 3 ,0 0 0 5 ,3 5 3 ,0 0 0 5 ,3 5 3 ,0 0 0 5 ,3 5 3 ,0 0 0 5 ,6 9 8 ,0 0 0 5 ,6 9 8 ,0 0 0 5 ,6 9 8 ,0 0 0 5 ,6 9 8 ,0 0 0 6 ,0 0 8 ,0 0 0 6 ,0 0 8 ,0 0 0 6 ,0 0 8 ,0 0 0 6 ,0 0 8 ,0 0 0 6 ,3 2 1 ,0 0 0 6 ,3 2 1 ,0 0 0 6 ,3 2 1 ,0 0 0 6 ,3 2 1 ,0 0 0 6 ,6 5 9 ,0 0 0 6 ,6 5 9 ,0 0 0 6 ,6 5 9 ,0 0 0 6 ,6 5 9 ,0 0 0 3 0 ,0 3 9 ,0 0 0 3 0 ,0 3 9 ,0 0 0 3 0 ,0 3 9 ,0 0 0 3 0 ,0 3 9 ,0 0 0 Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s Supervision 1,534,000 1,515,000 1,560,000 1,607,000 1,65 5,000 1,705,000 8,042,000 Collection 4,355,000 4,279,000 4,365,000 4,452,000 4,541 ,000 4,632,000 22,269,000 Capital Expenses 1,705,000 1,386,000 1,390,000 1,394,00 0 1,398,000 1,402,000 6,970,000 Capital Reserve 0 100,000 100,000 100,000 100,000 100,000 500,000 T ot al Ex pe n dit ur e s T ot al Ex pe n dit ur e s T ot al Ex pe n dit ur e s T ot al Ex pe n dit ur e s 7 ,5 9 4 ,0 0 0 7 ,5 9 4 ,0 0 0 7 ,5 9 4 ,0 0 0 7 ,5 9 4 ,0 0 0 7 ,2 8 0 ,0 0 0 7 ,2 8 0 ,0 0 0 7 ,2 8 0 ,0 0 0 7 ,2 8 0 ,0 0 0 7 ,4 1 5 ,0 0 0 7 ,4 1 5 ,0 0 0 7 ,4 1 5 ,0 0 0 7 ,4 1 5 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,5 5 3 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,6 9 4 ,0 0 0 7 ,8 3 9 ,0 0 0 7 ,8 3 9 ,0 0 0 7 ,8 3 9 ,0 0 0 7 ,8 3 9 ,0 0 0 3 7 ,7 8 1 ,0 0 0 3 7 ,7 8 1 ,0 0 0 3 7 ,7 8 1 ,0 0 0 3 7 ,7 8 1 ,0 0 0 Ne t Re v e nue Ne t Re v e nue Ne t Re v e nue Ne t Re v e nue (2 ,6 9 2 ,0 0 0 ) (2 ,6 9 2 ,0 0 0 ) (2 ,6 9 2 ,0 0 0 ) (2 ,6 9 2 ,0 0 0 ) (1 ,9 2 7 ,0 0 0 ) (1 ,9 2 7 ,0 0 0 ) (1 ,9 2 7 ,0 0 0 ) (1 ,9 2 7 ,0 0 0 ) (1 ,7 1 7 ,0 0 0 ) (1 ,7 1 7 ,0 0 0 ) (1 ,7 1 7 ,0 0 0 ) (1 ,7 1 7 ,0 0 0 ) (1 ,5 4 5 ,0 0 0 ) (1 ,5 4 5 ,0 0 0 ) (1 ,5 4 5 ,0 0 0 ) (1 ,5 4 5 ,0 0 0 ) (1 ,3 7 3 ,0 0 0 ) (1 ,3 7 3 ,0 0 0 ) (1 ,3 7 3 ,0 0 0 ) (1 ,3 7 3 ,0 0 0 ) (1 ,1 8 0 ,0 0 0 ) (1 ,1 8 0 ,0 0 0 ) (1 ,1 8 0 ,0 0 0 ) (1 ,1 8 0 ,0 0 0 ) (7 ,7 4 2 ,0 0 0 ) (7 ,7 4 2 ,0 0 0 ) (7 ,7 4 2 ,0 0 0 ) (7 ,7 4 2 ,0 0 0 ) Endi ng Bal ance , June 3 0 Endi ng Bal ance , June 3 0 Endi ng Bal ance , June 3 0 Endi ng Bal ance , June 3 0 10,373,000 8,446,000 6,729,000 5,184,000 3,811,000 2,631,000 1 The beginning balance for FY 201415 is from p. 25 3 of the 201415 Operating Budget. 2 Interest income for FY 201516 onward is based on the interest rates listed below times the beginning fund balance. 201516 201617 201718 201819 201920

0.5% 0.5% 0.5% 0.5% 0.5%
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4.13 Sewer Fund 621 Target Balances
Projected target cash levels for Sewer Fund 621 are shown in the table below. Operating targets are based on a minimum of 90 days to a maximum of 180 days of annual operation expenses.

Table 411. Sewer Fund 621 Projected Target Balances

Projected target cash levels for Sewer Fund 621 and Sewer Fund 622 are shown in the figure below along with the minimum and maximum target ending balance levels for Sewer Fund 621.

Figure 411. Projected Cash for Sewer Fund 621 and Sewer Fund 622

Projected Projected Fiscal Year
Item Notes 201415 201516 201617 201718 201819 201920 Operating Expenses 5,889,000 5,794,000 5,925,000 6,059, 000 6,196,000 6,337,000 Lower Target Ending Balance [1] 1,452,000 1,429,000 1,4 61,000 1,494,000 1,528,000 1,563,000 Higher Target Ending Balance [1] 2,904,000 2,857,000 2, 922,000 2,988,000 3,056,000 3,125,000 Ending Balances 10,373,000 8,446,000 6,729,000 5,184,000 3,811,000 2,631 ,000 Amount Over (Under) Lower Target 8,921,000 7,017,000 5 ,268,000 3,690,000 2,283,000 1,068,000 Amount Over (Under) Higher Target 7,469,000 5,589,000 3,807,000 2,196,000 755,000 (494,000) 1 Targets are based on 90 days to 180 days of annual operation expenses.

FiveYear Capital Project Expenditures =$8,750,000
10,373,000
8,446,000
6,729,000
5,184,000
3,811,000
2,631,000
100,000
200,000
300,000
400,000
500,000
581,000
586,000
604,000
699,000
810,000
1,006,000
0 2,000,000
4,000,000
6,000,000
8,000,000
10,000,000
12,000,000
201415 201516 201617 201718 201819 201920
Ending Fund 622
Balances
Ending Capital
Reserve Fund
Ending Fund 621
Balances
180 Days Cash
Target 621 Balance
90 Days Cash Target
621 Balan ce
Ending Balance
621 + 622 + Reserve
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4.14 Recommended Sewer Service Charges, FY16 – FY20
Historical and recommended (for FY16 – FY20) Sewer Service Charges are shown in the figure below.

Figure 412. Historic and Recommended Sewer Service Charges, FY9 – FY20

$9.10
$9.46
$9.84
$10.23 $10.23
$10.64
$11.06
$11.60
$12.20
$12.80
$13.40
$14.00

4.0% 4.0% 4.0%

0.0%

4.0% 3.9% 4.9% 5.2% 4.9% 4.7% 4.5%
$5.00
$6.00
$7.00
$8.00
$9.00
$10.00
$11.00
$12.00
$13.00
$14.00
$15.00
$16.00
200809 200910 201011 201112 201213 201314 201415 20 1516 201617 201718 201819 201920 Historic Sewer Service Charges
Recommended Sewer Service Charges (Flowbased)
% Historical Change in Sewer Service Charges
% Change in Sewer Service Charges (Flowbased)
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4.15 Residential Sewer Service Charges Surveys
The City’s current and recommended Sewer Service Charges for FY16 were compared to the Sewer Service Charges for other agencies that provide only sewer collection service. Results of the survey are shown in the table below.

Table 412. Residential Sewer Service Charges Survey

The City’s current and recommended Sewer Service Charges and the applicable wastewater treatment charges from Delta Diablo for FY16 were compared to the Sewer Service Charges and wastewater treatment charges for other agencies. Results of the survey are shown in the table below.

Table 413. Single Family Sewer Service and Wastewater Treatment Charges Survey

Single Multiple Apartments MF/SF AptMH/SF
Family Family Mobile Homes Ratio Ratio
Bay Point (Delta Diablo) $10.49 $10.49 $10.49 1.00 1.00 Ant ioch, C ur r e nt Ant ioch, C ur r e nt Ant ioch, C ur r e nt Ant ioch, C ur r e nt $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 $ 1 1 .0 6 1 .0 0 1 .0 0 1 .0 0 1 .0 0 1 .0 0 1 .0 0 1 .0 0 1 .0 0 Ant ioch, Pr opose d F Y1 6 Ant ioch, Pr opose d F Y1 6 Ant ioch, Pr opose d F Y1 6 Ant ioch, Pr opose d F Y1 6 $ 1 1 .6 0 $ 1 1 .6 0 $ 1 1 .6 0 $ 1 1 .6 0 $ 1 0 .1 0 $ 1 0 .1 0 $ 1 0 .1 0 $ 1 0 .1 0 $ 8 .9 0 $ 8 .9 0 $ 8 .9 0 $ 8 .9 0 0 .8 7 0 .8 7 0 .8 7 0 .8 7 0 .7 7 0 .7 7 0 .7 7 0 .7 7 Pittsburg $15.79 $13.50 $13.50 0.85 0.85
Sacramento Area Sewer District $19.85 $14.89 $14.89 0.75 0.75 Bay Point, Current
Antioch,
Current
Antioch,
Proposed FY16 Pittsburg, Current
Brentwood,
Adopted FY16
Collection $10.49 $11.06 $11.60 $15.79 $16.92
Treatment $24.25 $24.25 $24.25 $24.25 $33.60
T ot al T ot al T ot al T ot al $ 3 4 .7 4 $ 3 4 .7 4 $ 3 4 .7 4 $ 3 4 .7 4 $ 3 5 .3 1 $ 3 5 .3 1 $ 3 5 .3 1 $ 3 5 .3 1 $ 3 5 .8 5 $ 3 5 .8 5 $ 3 5 .8 5 $ 3 5 .8 5 $ 4 0 .0 4 $ 4 0 .0 4 $ 4 0 .0 4 $ 4 0 .0 4 $ 5 0 .5 2 $ 5 0 .5 2 $ 5 0 .5 2 $ 5 0 .5 2 For Bay Point, Antioch and Pittsburg, the Treatment category value is the FY 201415 Delta Diablo char ge.

For Brentwood, the Collection category represents t he City's Fixed Base charge and the Treatment categ ory represents the City's Variable Rate charges.

For Brentwood, the Variable Rate charges are based on 6,400 gallons of water use per month.

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Section 5
Development of Water Capacity
Charges
Capacity charges are intended to recover both a portion of the proposed Capital Improvement Program (CIP) cost, and utility rate payers’ prior investment in capital facilities that support land development by providing capacity for new connections. The capacity charges that are developed in this report meet the regulatory requirements found in Government Code Section 66000 et sequentia regarding the establishment of capacity charges. 6

5.1 Regulatory Requirements
Government Code Section 66013 defines a capacity charges as “a charge for public facilities in existence at the time a charge is imposed or charges for new public facilities to be acquired or constructed in the future that are of proportional benefit to the person or property being charged, including supply or capacity contracts for rights or entitlements, real property interests, and entitlements and other rights of the local agency involving capital expense relating to its use of existing or new public facilities. A ‘capacity charge’ does not include a commodity charge.” Section 66013 also describes requirements related to use of revenue from capacity charges and providing information to the public. This study does not examine the City’s practices regarding those requirements.

5.2 Conceptual Approach
In developing capacity charges, we have endeavored to satisfy the rational nexus criteria generally applied to these types of charges. A rational nexusbased capacity charge must:
• Be rationally based on public policy that demonstrates a nexus between new development (connections) and the need to expand or build facilities to accommodate it. • Not exceed the new development’s proportional share of the cost of facilities needed to serve that development, after crediting it for other contributions that it has already made or will make toward that cost.
• Not be arbitrary or discriminatory in its application to individuals or customer classes.

A capacity charge is a charge to pay for public agencies’ facilities in existence at the time the charge is imposed or to pay for new facilities that will be constructed in the future that are of benefit to the person or property being charged (new development or increases to existing service capacity). Capacity charges help ensure that the “growth pays for growth” by allocating the cost of new facilities and the cost of unused capacity in existing facilities to new development while allocating the cost of repairing and refurbishing facilities used by current customers to rates.

6 The terms “water facility reserve fee”, as used by the City, and “capacity charge”, as defined in the Government Code and used in this study, are synonymous.

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5.3 Current Water Capacity Charges
The basis for current Water Capacity Charges (Facility Reserve Fees) are described in Title 6 (Sanitation and Health), Chapter 5 (Water System) of the Antioch Municipal Code (AMC).

Total Water Facility Reserve Fees
from the City’s Master Fee Schedule ,
updated effective July 1, 2014, are
shown in the adjacent table.

This table shows the two, separate
charges that are collected by the
City, one for Contra Costa Water
District (CCWD) for its water
treatment capacity and another for
the City’s separate treatment
capacity and transmission and
distribution facilities.

Not shown in the table is another
facilities reserve charge imposed by
the CCWD upon the City for the
CCWD wholesale municipal supply. 7
The City collects both charges for
CCWD (water treatment capacity and
wholesale municipal supply) and remits the revenue to CCWD. Note that CCWD charges for its water treatment and charges for its wholesale municipal supply are distinct, separate charges.

The City’s current Master Fee Schedule does not show the breakdown between the Contra Costa Water District (CCWD) water treatment component and the City’s charge for its water treatment, transmission and distribution facilities. The two components are shown in this table to emphasize the fact that only the capacity charge for the City of Antioch is developed as part of this study.

7 § 65.18.1 of the AMC reads “The Contra Costa Water District has adopted Resolution 9324, creating a facilities reserve charge and imposing upon wholesale municipal customers amounts to be paid by the city to the District amounts for new or larger water meter issued by the city. It is the intention of the City Council that the amount owed to the Contra Costa Water District for each new or enlarged water meter shall be passed through to the water customer requesting the new or enlarged water meter.” As of this writing, the CCWD facilities reserve charge for wholesale municipal customers is $6,047.00 for a ⅝inch meter in Antioch (see CCWD Code of Regulations, Title 5, Water Supply and Rates, Chapter 5.20, Charges and Rates – Untreated (Raw) Water Service.

Antioch System
Contra Costa Treatment/
Water Meter Size or Water District Transmission/
Customer Class Treatment Distribution Total
Nonresidential
⅝ x ¾)inch $1,121.38 $5,059.69 $6,181.07
1)inch $2,803.45 $7,498.33 $10,301.78
1½)inch $5,606.90 $14,996.66 $20,603.56
2)inch $8,971.04 $23,994.66 $32,965.70
3)inch $17,942.08 $43,868.60 $61,810.68
4)inch $28,034.50 $74,983.30 $103,017.80
6)inch $56,069.00 $149,966.60 $206,035.60
8)inch $100,924.20 $364,282.49 $465,206.69
10)inch $162,600.10 $311,281.78 $473,881.88
12)inch $241,096.70 $644,856.37 $885,953.07
Residential
Singe dwelling unit $1,121.38 $5,059.69 $6,181.07
Duplex (2 dwelling units) $2,242.76 $7,408.38 $9,651.1 4 Additional dwelling units $1,121.38 $3,657.84 $4,779.2 2 Development of Water Capacity Charges Section 5

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5.4 Water System Valuation and Capacity
The system buyin method of the capacity charge recovers the cost of capacity in those portions of the existing system in which there is capacity available. The value of the existing system was developed using data for the following elements:
• Existing Fixed Assets
• Contributed Assets
• Contributed Capital
• City System Capital Improvement Program
• Working Capital
Existing Fixed Assets. The replacement value of assets was calculated by assets into type and size categories and multiplying the numbers in each asset category by a unit replacement cost. Calculation of the replacement value of the water system is shown in Appendix F, Table F1 (treatment plant, reservoirs, pump stations, booster pumps, hydrants, meters, and laterals) and in Appendix F, Table F2 (transmission and distribution pipe).

Contributed Assets. The City requires owners to construct and contribute assets needed to serve their development. The value of contributed assets is subtracted from the value of the asset base for development of capacity charges. Contributed assets include assets funded by Assessment District revenues.

Contributed Capital. The amount of revenue collected from developers is excluded from the valuation of the system. The amount of revenue collected from developers during 2004 –2013 was obtained from City accounting records. The amount of revenue collected from developers during 1970 – 2003 was estimated using historic fees for 1989 2003, estimates of historic fees for 1970 – 1988, and the estimated number of connections per year during 1970 2003. Calculation of the estimated amount of revenue collected from developers is summarized in Appendix F, Table F3.

Capital Improvement Program. Projected expenditures for modifications and upgrades to the City’s water system were provided by the City’s Engineer. The modifications and upgrades are valued at approximately $7,000,000 for FY16 – FY20 and are added to the valuation of the system.

Working Capital. The City records a cash balance in the Water Facility Expansion Fund (Fund 612). The budgeted fund balance for July 2015 is approximately $4,700,000.

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The valuation of the Water System, net of adjustments, is shown in Table 51.

Table 51. Valuation of Water System

Adjusted
Fixed Asset Category Valuation Adjustments Valuation
Water Treatment Plant $86,210,000 $86,210,000
Raw Water Pipelines $21,688,000 $21,688,000
Municipal Reservoir $18,000,000 $18,000,000
E. & W. Canal Pump Stations $4,470,000 $4,470,000
Clearwells $0 $0
Reservoirs $35,100,000 $35,100,000
Booster Pump Stations $18,797,000 $18,797,000
Pressure Reducing Valves $1,650,000 $1,650,000
Hydrants $23,075,000 $23,075,000
Service Laterals $76,000,000 ($76,000,000) $0
Meters $24,320,000 ($24,320,000) $0
Subsurface Distribution and Transmission Pipes $522, 541,000 $522,541,000 T otal Fixe d Asse t Valuation T otal Fixe d Asse t Valuation T otal Fixe d Asse t Valuation T otal Fixe d Asse t Valuation $ 8 31 , 8 5 1 , 0 0 0 $ 8 31 , 8 5 1 , 0 0 0 $ 8 31 , 8 5 1 , 0 0 0 $ 8 31 , 8 5 1 , 0 0 0 ($ 1 0 0 , 3 2 0 , 0 0 0 ) ($ 1 0 0 , 3 2 0 , 0 0 0 ) ($ 1 0 0 , 3 2 0 , 0 0 0 ) ($ 1 0 0 , 3 2 0 , 0 0 0 ) $ 7 3 1 , 5 3 1 , 0 0 0 $ 7 3 1 , 5 3 1 , 0 0 0 $ 7 3 1 , 5 3 1 , 0 0 0 $ 7 3 1 , 5 3 1 , 0 0 0 Adjustments

1. Contributed/Assessment District Assets
Less: Value of Assets
Reservoirs and Booster Pump Stations ($19,342,000)
Subsurface Collection Pipes ($385,263,000)

2. Contributed Capital
Less: Revenue from Capacity Charges ($110,603,000)

3. Debt Principal Outstanding
Less: no Debt Service $0

4. Water System Expansion CIP (Fund 612)
Plus: CIP funded by rates, FY16)FY20 $7,000,000

5. Working Capital (Fund 611)
Plus: Unrestricted Reserves, Average FY16)FY20 $4,700,000 Ne t Valuation Ne t Valuation Ne t Valuation Ne t Valuation $ 2 2 8 , 0 2 3 , 0 0 0 $ 2 2 8 , 0 2 3 , 0 0 0 $ 2 2 8 , 0 2 3 , 0 0 0 $ 2 2 8 , 0 2 3 , 0 0 0 Development of Water Capacity Charges Section 5

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5.5 Water System Unit Cost of Capacity
The Water System unit cost of capacity is calculated by dividing the net valuation of the water system (shown in Table 51) by the water system capacity.

The capacity of the water system is expressed in terms of capacity of the City’s water treatment plant (WTP). The 2013 Water Master Plan reports that the WTP has a maximum production capacity of about 37 million gallons per day.

Calculation of the Water System unit cost of capacity is shown in Table 52.

Table 52. Water System Unit Cost of Capacity

5.6 Single Family Residential Peak Month Water Use
The water capacity charge for a Single Family residential ⅝ x ¾inch water meter connection is correlated with average water use for the peak day in the peak month for all Single Family residential connections. Single Family Residential Peak Month Water Use is estimated as shown in Table 53.

Table 53. Single Family Residential Peak Month Water Use

Net Water System System Unit Cost
Valuation Capacity, gpd $/gpd
$228,023,000 ÷ 37,000,000 = $6.16
Average Annual Day, gpd 320
Peak Factor 2.58
Peak Day in Peak Month, gpd (rounded) 825
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5.7 Schedule of Water Capacity Charges
The Water Capacity Charges for nonresidential connections are a multiple of those for a single family connection. The multiple is based on the size of the water meter for nonresidential connections versus that for a single family connection. The multiple is based on the “equivalency factor” between the meter sizes. An “equivalency factor” is a value that expresses the capacity of a water meter in terms of the rated maximum capacity (in gallons per minute) of a standard meter. The standard meter for a single family connection is ⅝ x ¾inch.

Table 54. Recommended Water Capacity Charges

1.00)inch 38 gpm 2.5 $12,700

1.50)inch 75 gpm 5.0 $25,400

2.00)inch 120 gpm 8.0 $40,700

3.00)inch 225 gpm 15.0 $76,300

4.00)inch 375 gpm 25.0 $127,100

6.00)inch 750 gpm 50.0 $254,200

8.00)inch 1,200 gpm 80.0 $406,700

10.00)inch 1,725 gpm 115.0 $584,700

12.00)inch 2,475 gpm 165.0 $838,900
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5.8 Comparison of Current vs. Recommended Capacity Charges The current and recommended schedule of Water Capacity Charges is shown in Table 55. The recommended capacity charges are for FY16.

Table 55. Current and Recommended Water Capacity Charges

Charges for FY17 onward may be escalated using an appropriate index such as the Engineering News Record 20City Construction Cost Index, as published by Engineering NewsRecord, McGrawHill Publishing Company. Charges would be escalated by the ratio of the index values from March of the preceding year to March of the current year, with escalated charges to be effective on July 1 of each year.

5.9 Survey of Single Family Water Capacity Charges
The City’s current and recommended Water Capacity Charges were compared to the capacity charges for other agencies. The comparison is made using the charge that is typical for a single family connection at each agency. Capacity charges paid to CCWD for raw and treated water in the service areas for the Cities of Antioch and Pittsburg are shown to allow a better comparison with capacity charges in the CCWD retail service area.

Table 56. Survey of Single Family Water Capacity Charges

Difference
Connection Type Recommended Current Dollar Percent
Single Family Residential Connection $5,080 $5,060 $20 0.4% Meter Connection Size
⅝ x ¾)inch $5,080 $5,060 $20 0.4%

1.00)inch $12,700 $7,498 $5,202 69%

1.50)inch $25,400 $14,997 $10,403 69%

2.00)inch $40,700 $23,995 $16,705 70%

3.00)inch $76,300 $43,869 $32,431 74%

4.00)inch $127,100 $74,983 $52,117 70%

6.00)inch $254,200 $149,967 $104,233 70%

8.00)inch $406,700 $364,282 $42,418 12%

10.00)inch $584,700 $311,282 $273,418 88%

12.00)inch $838,900 $644,856 $194,044 30%
Component
Antioch
Current
Antioch
Recommended
FY16
Pittsburg
Current
Brentwood
Adopted
FY16
Contra Costa
Water District
Individual Cities Component $5,060 $5,080 $5,060 $7,486 Contra Costa Water District Treated Water $1,121 $1,1 21 Contra Costa Water District Supply Component $6,047 $ 6,047 $6,047 Contra Costa Water District $18,966
Total Charges $ 1 2 , 2 2 8 $ 1 2 , 2 2 8 $ 1 2 , 2 2 8 $ 1 2 , 2 2 8 $ 1 2 , 2 4 8 $ 1 2 , 2 4 8 $ 1 2 , 2 4 8 $ 1 2 , 2 4 8 $ 1 1 , 1 0 7 $ 1 1 , 1 0 7 $ 1 1 , 1 0 7 $ 1 1 , 1 0 7 $ 7 , 4 8 6 $ 7 , 4 8 6 $ 7 , 4 8 6 $ 7 , 4 8 6 $ 1 8 , 9 6 6 $ 1 8 , 9 6 6 $ 1 8 , 9 6 6 $ 1 8 , 9 6 6 The City of Pittsburg has fees for 10 separate area s that range from $2,430 to $9,200. The median valu e is used in the survey.

The City of Antioch fee for CCWD treated water is p er the Treated Water Service Agreement dated Decemb er 5, 2001 Section 5 Development of Water Capacity Charges

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5.10 Water Fund 612 Projected Cash Flow
The City maintains a separate enterprise fund – Water Line Expansion, Fund 612, – for operations and expenditures related to water line expansions. The projected cash flow for FY15 – FY20 is shown in the table below. Note that the primary source of revenues are fees collected from developers (water capacity charges).

Table 57. Water Fund 612 Projected Cash Flow

Budget Projected Fiscal Year Five)Year
Items Notes 2014)15 2015)16 2016)17 2017)18 2018)19 2019)2 0 Total Be g inn in g Bal an ce , Jul y 1 Be g inn in g Bal an ce , Jul y 1 Be g inn in g Bal an ce , Jul y 1 Be g inn in g Bal an ce , Jul y 1 [1] 3,682,000 4,046,430 2,550 ,430 1,126,430 1,658,430 2,225,430 Re v e nu e s Re v e nu e s Re v e nu e s Re v e nu e s Capacity Charges [2] 1,138,430 1,143,000 1,172,000 1,335 ,000 1,368,000 1,543,000 6,561,000 Investment Income [3] 35,000 20,000 13,000 6,000 8,000 11, 000 58,000 Tot al Re v e nue s Tot al Re v e nue s Tot al Re v e nue s Tot al Re v e nue s 1 ,1 7 3 ,4 3 0 1 ,1 7 3 ,4 3 0 1 ,1 7 3 ,4 3 0 1 ,1 7 3 ,4 3 0 1 ,1 6 3 ,0 0 0 1 ,1 6 3 ,0 0 0 1 ,1 6 3 ,0 0 0 1 ,1 6 3 ,0 0 0 1 ,1 8 5 ,0 0 0 1 ,1 8 5 ,0 0 0 1 ,1 8 5 ,0 0 0 1 ,1 8 5 ,0 0 0 1 ,3 4 1 ,0 0 0 1 ,3 4 1 ,0 0 0 1 ,3 4 1 ,0 0 0 1 ,3 4 1 ,0 0 0 1 ,3 7 6 ,0 0 0 1 ,3 7 6 ,0 0 0 1 ,3 7 6 ,0 0 0 1 ,3 7 6 ,0 0 0 1 ,5 5 4 ,0 0 0 1 ,5 5 4 ,0 0 0 1 ,5 5 4 ,0 0 0 1 ,5 5 4 ,0 0 0 6 ,6 1 9 ,0 0 0 6 ,6 1 9 ,0 0 0 6 ,6 1 9 ,0 0 0 6 ,6 1 9 ,0 0 0 Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s Services & Supplies 7,000 7,000 7,000 7,000 7,000 7,000 35 ,000 Water Main Replacement 800,000 2,650,000 2,600,000 800, 000 800,000 800,000 7,650,000 Transfer Out 0 0 0 0 0 0 0
Internal Services 2,000 2,000 2,000 2,000 2,000 2,000 10,0 00 Tot al Ex pe ndit ur e s Tot al Ex pe ndit ur e s Tot al Ex pe ndit ur e s Tot al Ex pe ndit ur e s 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 2 ,6 5 9 ,0 0 0 2 ,6 5 9 ,0 0 0 2 ,6 5 9 ,0 0 0 2 ,6 5 9 ,0 0 0 2 ,6 0 9 ,0 0 0 2 ,6 0 9 ,0 0 0 2 ,6 0 9 ,0 0 0 2 ,6 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 8 0 9 ,0 0 0 7 ,6 9 5 ,0 0 0 7 ,6 9 5 ,0 0 0 7 ,6 9 5 ,0 0 0 7 ,6 9 5 ,0 0 0 Ne t R e v e nue Ne t R e v e nue Ne t R e v e nue Ne t R e v e nue 364,430 (1,496,000) (1,424,000) 532,000 567, 000 745,000 (1,076,000) Endin g Bal ance , Jun e 3 0 Endin g Bal ance , Jun e 3 0 Endin g Bal ance , Jun e 3 0 Endin g Bal ance , Jun e 3 0 4 ,0 4 6 ,4 3 0 4 ,0 4 6 ,4 3 0 4 ,0 4 6 ,4 3 0 4 ,0 4 6 ,4 3 0 2 ,5 5 0 ,4 3 0 2 ,5 5 0 ,4 3 0 2 ,5 5 0 ,4 3 0 2 ,5 5 0 ,4 3 0 1 ,1 2 6 ,4 3 0 1 ,1 2 6 ,4 3 0 1 ,1 2 6 ,4 3 0 1 ,1 2 6 ,4 3 0 1 ,6 5 8 ,4 3 0 1 ,6 5 8 ,4 3 0 1 ,6 5 8 ,4 3 0 1 ,6 5 8 ,4 3 0 2 ,2 2 5 ,4 3 0 2 ,2 2 5 ,4 3 0 2 ,2 2 5 ,4 3 0 2 ,2 2 5 ,4 3 0 2 ,9 7 0 ,4 3 0 2 ,9 7 0 ,4 3 0 2 ,9 7 0 ,4 3 0 2 ,9 7 0 ,4 3 0 1 The beginning balance for FY 2014)15 is from p. 25 2 of the 2014)15 Operating Budget. 2 Revenue from capacity charges for 2015)16 onward i s estimated as shown below. 2014)15 2015)16 2016)17 2017)18 2018)19 2019)20 Total
current capacity charge, $/¾)meter > 5,060
projected annual escalation percent > 2.5% 2.5% 2.5% 2.5% projected capacity charge, $/¾)meter > 5,080 5,210 5,3 40 5,470 5,610 projected ¾)meter connections > 225 225 225 250 250 275 projected capacity charge revenue, $ > 1,138,430 1,14 3,000 1,172,250 1,335,000 1,367,500 1,542,750 6,560,500 3 Interest income for FY 2015)16 onward is based on the interest rates listed below times the beginning fund balance. 2015)16 2016)17 2017)18 2018)19 2019)20

0.5% 0.5% 0.5% 0.5% 0.5%

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Section 6
Development of Sewer Capacity
Charges
Capacity charges are intended to recover both a portion of the proposed Capital Improvement Program (CIP) cost, and utility rate payers’ prior investment in capital facilities that support land development by providing capacity for new connections. The capacity charges that are developed in this report meet the regulatory requirements found in Government Code Section 66000 et sequentia regarding the establishment of capacity charges. 8

6.1 Regulatory Requirements
Government Code Section 66013 defines a capacity charges as “a charge for public facilities in existence at the time a charge is imposed or charges for new public facilities to be acquired or constructed in the future that are of proportional benefit to the person or property being charged, including supply or capacity contracts for rights or entitlements, real property interests, and entitlements and other rights of the local agency involving capital expense relating to its use of existing or new public facilities. A ‘capacity charge’ does not include a commodity charge.” Section 66013 also describes requirements related to use of revenue from capacity charges and providing information to the public. This study does not examine the City’s practices regarding those requirements.

6.2 Conceptual Approach
In developing capacity charges, we have endeavored to satisfy the rational nexus criteria generally applied to these types of charges. A rational nexusbased capacity charge must:
• Be rationally based on public policy that demonstrates a nexus between new development (connections) and the need to expand or build facilities to accommodate it. • Not exceed the new development’s proportional share of the cost of facilities needed to serve that development, after crediting it for other contributions that it has already made or will make toward that cost.
• Not be arbitrary or discriminatory in its application to individuals or customer classes.

8 The term “sewer facility reserve fee”, as used by the City, and “capacity charge”, as defined in the Government Code and used in this study, are synonymous.

Section 6 Development of Sewer Capacity Charges

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6.3 Current Sewer Capacity Charges
The basis for current Sewer Capacity Charges (Facility
Reserve Fees) are described in Title 6 (Sanitation and
Health), Chapter 4 (Sewer System) of the Antioch Municipal Code (AMC).

Current Sewer Facility Reserve Fees from the City’s Master Fee Schedule , updated effective July 1, 2014, are shown in the adjacent table. The Master Fee Schedule states that “… Sewer Connection Fees shall automatically adjust in each succeeding year in accordance with the ‘ Engineering News Record [italics added] Cost of Construction Index.’” 9.

6.4 Sewer System Valuation and Capacity
The system buyin method of the capacity charge recovers the cost of capacity in those portions of the existing system in which there is capacity available. The value of the existing system was developed using data for the following elements:
• Existing Fixed Assets
• Contributed Assets
• Contributed Capital
• City System Capital Improvement Program
• Working Capital

Existing Fixed Assets. The replacement value of subsurface collection pipes was calculated by segregating the pipes into size categories and multiplying the amount of pipe in each size category (in miles) by a unit replacement cost. Calculation of the replacement value of subsurface collection pipes is shown in Appendix G, Table G1.

Contributed Assets. The City requires owners to construct and contribute assets needed to serve their development. The value of contributed assets is subtracted from the value of the asset base for development of capacity charges. The value of subsurface collection pipe less than 8” in diameter is considered a contributed asset and is excluded from the valuation of the subsurface collection pipe.

Contributions of subsurface collection pipe greater than or equal to 8” in diameter vary for each size category. Contributed assets include assets funded by Assessment District revenues.

9 The Engineering News Record publishes a Construction Cost Index for 20 different cities in the United States and a 20City composite index. The index used by the City of Antioch is the 20City Construction Cost Index.

Water Meter Size or Sewer
Customer Class Facility Reserve Fees
Nonresidential
⅝ x ¾(inch $2,335.52
1(inch $5,056.01
1½(inch $9,068.28
2(inch $14,509.24
3(inch $29,018.49
4(inch $45,341.38
6(inch $90,682.77
8(inch $145,092.44
10(inch $262,980.04
12(inch $389,935.92
Residential
Singe dwelling unit $2,335.52
Duplex (2 dwelling units) $4,671.04
Additional dwelling units $404.95
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Contributed Capital. The amount of revenue collected from developers is excluded from the valuation of the sewer system. The amount of revenue collected from developers during 2004 –2013 was obtained from City accounting records. The amount of revenue collected from developers during 1970 – 2003 was estimated using historic fees for 1989 2003, estimates of historic fees for 1970 – 1988, and the estimated number of connection per year during 1970 2003. Calculation of the estimated amount of revenue collected from developers is summarized in Appendix G, Table G2.

Capital Improvement Program. Projected expenditures for modifications and upgrades to the City’s sewer system were provided by the City’s Engineer. The modifications and upgrades are valued at approximately $2,500,000 for FY16 – FY20 and are added to the valuation of the sewer system.

Working Capital. The City records a small cash balance in the Sewer Facility Expansion Fund (Fund 622).

The budgeted fund balance for July 2015 is approximately $600,000.

The valuation of the Sewer System, net of adjustments, is shown in Table 61.

Table 61. Valuation of Sewer System

The capacity of the sewer system is estimated to be equivalent to the current average annual wastewater discharge volume for all customers and is shown in the table below.

Table 62. Sewer System Capacity

Adjusted
Fixed Asset Category Valuation Valuation
Subsurface Collection Pipes $493,333,000
Adjustments

1. Contributed Assets
Less: Value of Contributed Assets
Subsurface Collection Pipes ($363,069,000)

2. Contributed Capital
Less: Revenue from Capacity Charges ($36,643,000)

3. Debt Principal Outstanding
Less: no Debt Service $0

4. Sewer System Expansion CIP (Fund 622)
Plus: CIP funded by capacity charges, FY16(FY20 $2,500,000

5. Working Capital (Fund 622)
Plus: Unrestricted Reserves, FY16 $600,000
Net Valuation $96,721,000
Customer Class CCF
Single Family 2,926,245
Multi Family 245,575
Apartments/Mobile Homes 249,724
Com/Inst 407,766
Industrial 121,781
Other 11,105
Total CCF 3,962,196
Total, million gallons 2,964
Total, gallons per day (round to 1,000) 8,121,000
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6.5 Sewer Unit Cost of Capacity
The Sewer Unit Cost of Capacity is calculated by dividing the net valuation of the sewer system (shown in Table 61) by the sewer system capacity (shown in Table 62). Calculation of the Sewer Unit Cost of Capacity is shown in Table 63.

Table 63. Sewer Unit Cost of Capacity

6.6 Schedule of Sewer Capacity Charges
Sewer Capacity Charges for all connections are based on the Sewer Unit Cost of Capacity. Sewer Capacity Charges are determined by multiplying the wastewater volume for a connection times the Sewer Unit Cost of Capacity. Recommended capacity charges for Residential connections and examples of capacity charges for Nonresidential connections are shown in Table 64.

Table 64. Recommended Sewer Capacity Charges

Net Sewer System Wastewater Discharge Unit Cost of Ca pacity Valuation Volume, gallons per day $/gallons per day
$96,721,000 ÷ 8,121,000 = $11.91
Unit Cost of Capacity, $/gallons per day $11.91
Capacity Charges
Residential
gallons per day Capacity Charge
Singe Family 210 $2,500
Multiple Family 168 $2,000
Apartments/Mobile Homes 137 $1,630
Nonresidential gallons per day Capacity Charge
Example 1 210 $2,500
Example 2 630 $7,500
Example 3 2,100 $25,010
Example 4 4,200 $50,020
Example 5 5,250 $62,530
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6.7 Comparison of Current vs. Recommended Capacity Charges The current and recommended schedule of Sewer Capacity Charges for Residential connections is shown in Table 65. The recommended Sewer Capacity Charges are for FY16. Current and recommended Sewer Capacity Charges for Nonresidential connections are not comparable as the current charges are based on water meter size and recommended charges are based on wastewater discharge volume.

Table 65. Current and Recommended Residential Sewer Capacity Charges

6.8 Survey of Single Family Capacity Charges
The City’s current and recommended Sewer Capacity Charges were compared to the capacity charges for other agencies. The comparison is made using the charge that is typical for a single family connection at each agency. All agencies included in the survey provide only sewer collection services – not wastewater treatment or disposal. Table 66 shows the results of the survey.

Table 66. Survey of Single Family Sewer Capacity Charges

Current Recommended Increase (Decrease)
Customer Class Charges Charges Dollars Percent
Unit Cost of Capacity, $/gallons per day $11.91
Single Family $2,336 $2,500 $164 7%
Multiple Family $2,336 $2,000 ($336) (14%
Apartments/Mobile Homes $2,336 $1,630 ($706) (30%
Agency County Charge
City of Antioch, Current Contra Costa $2,336
City of Antioch, Propose d FY1 6 City of Antioch, Propose d FY1 6 City of Antioch, Propose d FY1 6 City of Antioch, Propose d FY1 6 Contra Costa $ 2 , 5 0 0 $ 2 , 5 0 0 $ 2 , 5 0 0 $ 2 , 5 0 0 City of Pittsburg Contra Costa $4,214
Sacramento Area Sewer District Sacramento $2,550
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The City’s current and recommended Sewer Capacity Charges were added to capacity charges levied by Delta Diablo for wastewater treatment and disposal and compared to the total wastewater collection, treatment and disposal capacity charges for other agencies. The comparison is made using the charge that is typical for a single family connection at each agency. Table 67 shows the results of the survey.

Table 67. Survey of Single Family Wastewater Collection, Treatment and Disposal Capacity Charges

6.9 Sewer Facility Expansion Fund 622 Projected Cash Flow The City maintains a separate enterprise fund – Sewer Facility Expansion, Fund 622 – for operations and expenditures related to construction of oversize sewer facilities or replacement of inadequate sewers.

The projected cash flow for FY15 – FY20 is shown in the table below. Note that the primary source of revenues are fees collected from developers (Sewer Capacity Charges).

Table 68. Sewer Fund 612 Projected Cash Flow

Antioch, Current
Antioch, Proposed
FY16 Pittsburg, Current Bay Point, Current
Brentwood,
Adopted FY16
Collection $2,336 $2,500 $4,214
Treatment $5,033 $5,033 $4,358
T otal T otal T otal T otal $ 7 , 3 6 9 $ 7 , 3 6 9 $ 7 , 3 6 9 $ 7 , 3 6 9 $ 7 , 5 3 3 $ 7 , 5 3 3 $ 7 , 5 3 3 $ 7 , 5 3 3 $ 8 ,5 7 2 $ 8 ,5 7 2 $ 8 ,5 7 2 $ 8 ,5 7 2 $ 3 , 9 4 0 $ 3 , 9 4 0 $ 3 , 9 4 0 $ 3 , 9 4 0 $ 4 , 4 7 0 $ 4 , 4 7 0 $ 4 , 4 7 0 $ 4 , 4 7 0 For Antioch and Pittsburg, the Treatment category v alue is the FY 2014(15 Delta Diablo charge.

For Bay Point, the total charge is the FY 2014(15 D elta Diablo charge.

For Brentwood, the total charge has one component w ith no breakdown shown by the City.

Budget Projected Fiscal Year
Item Notes 2014(15 2015(16 2016(17 2017(18 2018(19 2019(20 Total Be g inn in g Bal an ce , Jul y 1 Be g inn in g Bal an ce , Jul y 1 Be g inn in g Bal an ce , Jul y 1 Be g inn in g Bal an ce , Jul y 1 [1] 3,223,647 580,697 586,497 603,997 698,797 809,697 Re v e nu e s Re v e nu e s Re v e nu e s Re v e nu e s Capacity Charges [2] 300,000 562,500 576,000 655,000 672, 500 759,000 3,225,000 Transfer from Fund 621
Investment Income [3] 15,000 2,900 2,900 3,000 3,500 4,000 16,300 T ot a l Re v e n ue s T ot a l Re v e n ue s T ot a l Re v e n ue s T ot a l Re v e n ue s 3 1 5 ,0 0 0 3 1 5 ,0 0 0 3 1 5 ,0 0 0 3 1 5 ,0 0 0 5 6 5 ,4 0 0 5 6 5 ,4 0 0 5 6 5 ,4 0 0 5 6 5 ,4 0 0 5 7 8 ,9 0 0 5 7 8 ,9 0 0 5 7 8 ,9 0 0 5 7 8 ,9 0 0 6 5 8 ,0 0 0 6 5 8 ,0 0 0 6 5 8 ,0 0 0 6 5 8 ,0 0 0 6 7 6 ,0 0 0 6 7 6 ,0 0 0 6 7 6 ,0 0 0 6 7 6 ,0 0 0 7 6 3 ,0 0 0 7 6 3 ,0 0 0 7 6 3 ,0 0 0 7 6 3 ,0 0 0 3 ,2 4 1 ,3 0 0 3 ,2 4 1 ,3 0 0 3 ,2 4 1 ,3 0 0 3 ,2 4 1 ,3 0 0 Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s Ex pe ndit ur e s [1] Services & Supplies 56,791 58,500 60,300 62,100 64,000 65 ,900 310,800 Interfund Charges 1,159 1,100 1,100 1,100 1,100 1,100 5,50 0 Sewer Main Replacement 2,900,000 500,000 500,000 500,00 0 500,000 500,000 2,500,000 T ot a l Ex pe n di t ur e s T ot a l Ex pe n di t ur e s T ot a l Ex pe n di t ur e s T ot a l Ex pe n di t ur e s 2 ,9 5 7 ,9 5 0 2 ,9 5 7 ,9 5 0 2 ,9 5 7 ,9 5 0 2 ,9 5 7 ,9 5 0 5 5 9 ,6 0 0 5 5 9 ,6 0 0 5 5 9 ,6 0 0 5 5 9 ,6 0 0 5 6 1 ,4 0 0 5 6 1 ,4 0 0 5 6 1 ,4 0 0 5 6 1 ,4 0 0 5 6 3 ,2 0 0 5 6 3 ,2 0 0 5 6 3 ,2 0 0 5 6 3 ,2 0 0 5 6 5 ,1 0 0 5 6 5 ,1 0 0 5 6 5 ,1 0 0 5 6 5 ,1 0 0 5 6 7 ,0 0 0 5 6 7 ,0 0 0 5 6 7 ,0 0 0 5 6 7 ,0 0 0 2 ,8 1 6 ,3 0 0 2 ,8 1 6 ,3 0 0 2 ,8 1 6 ,3 0 0 2 ,8 1 6 ,3 0 0 Ne t R e v e nue Ne t R e v e nue Ne t R e v e nue Ne t R e v e nue (2,642,950) 5,800 17,500 94,800 110,900 196,0 00 Endin g Bal ance , Jun e 3 0 Endin g Bal ance , Jun e 3 0 Endin g Bal ance , Jun e 3 0 Endin g Bal ance , Jun e 3 0 5 8 0 ,6 9 7 5 8 0 ,6 9 7 5 8 0 ,6 9 7 5 8 0 ,6 9 7 5 8 6 ,4 9 7 5 8 6 ,4 9 7 5 8 6 ,4 9 7 5 8 6 ,4 9 7 6 0 3 ,9 9 7 6 0 3 ,9 9 7 6 0 3 ,9 9 7 6 0 3 ,9 9 7 6 9 8 ,7 9 7 6 9 8 ,7 9 7 6 9 8 ,7 9 7 6 9 8 ,7 9 7 8 0 9 ,6 9 7 8 0 9 ,6 9 7 8 0 9 ,6 9 7 8 0 9 ,6 9 7 1 ,0 0 5 ,6 9 7 1 ,0 0 5 ,6 9 7 1 ,0 0 5 ,6 9 7 1 ,0 0 5 ,6 9 7 1 All values for FY 2014(15 and FY 2015(16 are from p. 258 of the 2014(15 Operating Budget.

Expenditures for FY 2016(17 onward are based a 3% e scalation of the previous years' value. 2 Revenue from capacity charges for 2015(16 onward i s estimated as shown below. 2014(15 2015(16 2016(17 2017(18 2018(19 2019(20
current capacity charge, $/EDU > 2,336
projected annual escalation percent > 2.5% 2.5% 2.5% 2.5% projected capacity charge, $/EDU > 2,500 2,560 2,620 2,690 2,760 projected EDU connections > 225 225 250 250 275
projected capacity charge revenue, $ > 562,500 576,000 655,000 672,500 759,000 3 Interest income for FY 2015(16 onward is based on the interest rates listed below times the beginning fund balance. 2015(16 2016(17 2017(18 2018(19 2019(20

0.5% 0.5% 0.5% 0.5% 0.5%

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Section 7
Limitations
This document was prepared solely for the City of Antioch in accordance with professional standards at the time the services were performed and in accordance with the contract between the City of Antioch and Municipal Financial Services. This document is governed by the specific scope of work authorized by the City of Antioch in an Agreement dated January 29, 2014; it is not intended to be relied upon by any other party. We have relied on information or instructions provided by the City of Antioch and, unless otherwise expressly indicated, have made no independent investigation as to the validity, completeness, or accuracy of such information.

This Page Intentionally Blank.

Water and Sewer Rates and Capacity Charges Study

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Appendix A: Water Use Data

This Page Intentionally Blank.

Table A1
Historic and Projected Water Deliveries
Item 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 201415 201516 201617 201718 201819 201920 Production, HCF 8,550,158 9,055,443 8,902,724 8,539,693 9,311,375 8,839,480 7,898,743 7,515,038 7,565,201 7,824,967 8,242,214 7,245,021 Deliveries, HCF [1]
Single Family 5,886,697 6,478,175 6,592,815 6,509,339 6,227,384 5,844,011 5,049,668 4,905,405 4,875,488 5,138,397 5,388,837 4,497,012 4,396,149 4,297,290 4,203,965 4,112,373 4,025,841 Multi Family 644,884 698,313 635,683 611,033 611,838 589,218 563,518 543,083 576,288 580,836 595,889 544,896 533,998 523,318 512,852 502,595 492,543 Com/Inst 634,733 643,599 605,177 606,880 640,588 717,616 608,402 563,587 702,722 642,078 635,139 649,496 636,506 623,776 611,301 599,075 587,093 Industrial 332,996 424,609 419,220 418,510 365,370 367,813 338,676 320,623 328,698 121,781 101,649 107,454 105,305 103,199 101,135 99,112 97,130 Lscp/Irr 1,117,404 1,175,638 445,171 1,349,048 1,660,566 1,584,738 785,833 814,881 656,015 923,208 1,049,682 792,360 776,513 760,983 745,763 730,848 716,231 Other 160,862 83,926 62,187 70,497 44,060 37,910 277,276 249,410 114,819 111,049 162,617 103,301 101,235 99,211 97,226 95,282 93,376 Total 8,777,577 9,504,260 8,760,253 9,565,307 9,549,806 9,141,306 7,623,373 7,396,989 7,254,030 7,517,349 7,933,813 6,694,519 6,549,706 6,407,776 6,272,242 6,139,284 6,012,214 Total, rounded 8,780,000 9,500,000 8,760,000 9,570,000 9,550,000 9,140,000 7,620,000 7,400,000 7,250,000 7,520,000 7,930,000 6,690,000 6,550,000 6,410,000 6,270,000 6,140,000 6,010,000 Total, million gallons 6,567 7,110 6,554 7,156 7,144 6,839 5,703 5,534 5,427 5,624 5,935 5,008 4,900 4,794 4,692 4,593 4,498 Total, gallons per day17,990,000 19,480,000 17,950,000 19,600,000 19,570,000 18,740,000 15,620,000 15,160,000 14,870,000 15,410,000 16,260,000 13,720,000 13,420,000 13,130,000 12,860,000 12,580,000 12,320,000 Accounts [2]
Single Family 27,234 27,432 27,644 27,550 27,143 27,486 27,812 28,003 28,287 28,466 28,602 28,827 29,052 29,277 29,527 29,777 30,052 Multi Family 693 693 695 695 680 688 688 690 690 688 688 688 688 688 688 688 688 Com/Inst 720 742 719 760 763 769 775 778 789 779 788 788 788 788 788 788 788 Industrial 15 15 19 19 19 18 18 17 17 17 15 15 15 15 15 15 15 Lscp/Irr 1,068 1,073 1,143 1,092 1,103 1,105 1,079 1,081 877 1,076 1,065 1,065 1,065 1,065 1,065 1,065 1,065 Other 191 169 216 243 246 261 295 294 301 301 280 280 280 280 280 280 280 Total 29,921 30,124 30,436 30,359 29,954 30,327 30,667 30,863 30,961 31,327 31,438 31,663 31,888 32,113 32,363 32,613 32,888 Average Use, HCF/mo [3]
Single Family 18.0 19.7 19.9 19.7 19.1 17.7 15.1 14.6 14.4 15.0 15.7 13.0 12.6 12.2 11.9 11.5 11.2 Multi Family 78 84 76 73 75 71 68 66 70 70 72 66 65 63 62 61 60 Com/Inst 73 72 70 67 70 78 65 60 74 69 67 69 67 66 65 63 62 Industrial 1,850 2,359 1,839 1,836 1,603 1,703 1,568 1,572 1,611 597 565 597 585 573 562 551 540 Lscp/Irr 87 91 32 103 125 120 61 63 62 72 82 62 61 60 58 57 56 Other 70 41 24 24 15 12 78 71 32 31 48 31 30 30 29 28 28 Notes:
1 Deliveries for 2003 2013 are from Department of Water Resources (DWR) Form 38 reports. Deliveries for 2014 onward are projected. 2 The number of accounts for 2003 2013 are from DWR Form 38 reports. The number of additional accounts for 2014 onward are projected as shown below. 201415 201516 201617 201718 201819 201920
Single Family 225 225 225 250 250 275
All Other Customer Classes 0 0 0 0 0 0
3 Average use for 2003 2013 is based on City data. Average use for 2014 onward was developed by the Consultant. 201516 201617 201718 201819 201920
Single Family 3.0% 3.0% 3.0% 3.0% 3.0%
All Other Customer Classes 2.0% 2.0% 2.0% 2.0% 2.0% 0 1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
7,000,000
8,000,000
9,000,000
10,000,000
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 201415 201516 201617 201718 201819 201920 Hundred Cubic Feet (HCF)
Other
Lscp/Irr
Industrial
Com/Inst
Multi Family
Single Family
Table A2
Evaluation of Electricity Use and Water Use by Zone
List of Pump Stations Serving Each ZoneList of Pump Stations Serving Each ZoneList of Pump Stations Serving Each ZoneList of Pump Stations Serving Each Zone Zone Pump Stations
Zone I Canal East, Canal West and River
Zone II Sunset and Water Treatment Plant
Zone III Bear Ridge, Donlon, Hillcrest, Lone Tree #1 and Lone Tree #2 Zone IV Cambridge and Dallas Ranch
Electricity Use by Month at Each Pump StationElectricity Use by Month at Each Pump StationElectricity Use by Month at Each Pump StationElectricity Use by Month at Each Pump Station Meter Name Zone Jul12 Aug12 Sep12 Oct12 Nov12 Dec12 Jan13 Feb13 Mar13 Apr13 May13 Jun13 8147598554 Lone Tree #2 III $14,063 $11,135 $8,903 $8,178 $5,659 $4,829 $3,709 $2,306 $3,419 $4,299 $6,760 $11,444 8147598893 Hillcrest III $8,362 $8,582 $7,602 $7,894 $5,009 $2,736 $4,291 $4,188 $4,508 $4,330 $7,232 $10,244 8147598467 Dallas Ranch IV $15,312 $16,497 $15,832 $15,852 $13,749 $9,034 $5,438 $4,777 $4,919 $6,818 $7,216 $12,449 8147598821 Canal W RawCW $14,115 $28,162 $21,565 $12,461 $7,862 $1,545 $327 $343 $928 $1,591 $13,382 $17,454 8147598267 Sunset II $769 $699 $718 $728 $594 $458 $490 $471 $509 $465 $615 $783 8147598393 Donlon III $6,219 $6,199 $5,700 $5,888 $4,074 $2,613 $2,053 $2,155 $2,417 $2,943 $4,632 $6,278 8147598956 Cambridge IV $2,525 $2,302 $2,334 $2,248 $1,578 $1,162 $1,009 $1,081 $1,293 $1,240 $1,928 $2,570 3314263702 River RawR $36,993 $4,397 $4,339 $4,497 $4,310 $2,044 $43,276 $54,007 $62,995 $58,987 $54,951 $54,501 3314263704 WTP WTP $66,293 $67,502 $59,104 $55,420 $40,179 $26,321 $14,047 $26,068 $29,737 $32,478 $49,427 $64,077 8147598424 Lone Tree #1 III $11,160 $10,926 $11,406 $10,521 $8,798 $4,980 $3,849 $4,917 $5,258 $5,248 $8,182 $10,976 8147598737 Canal E RawCE $6,281 $5,037 $7,108 $7,546 $6,384 $4,880 $214 $840 $562 $2,806 $5,548 $6,061 8147598507 Bear Ridge III $402 $438 $443 $432 $307 $200 $193 $182 $215 $204 $308 $447 Total $182,494 $161,877 $145,054 $131,664 $98,502 $60,801 $78,896 $101,336 $116,761 $121,408 $160,182 $197,285 Summary by Month
Dollars
Zone I $57,389 $37,596 $33,012 $24,504 $18,557 $8,469 $43,816 $55,190 $64,484 $63,384 $73,881 $78,016 Zone II $67,063 $68,202 $59,822 $56,148 $40,773 $26,779 $14,537 $26,539 $30,246 $32,943 $50,042 $64,860 Zone III $40,205 $37,280 $34,054 $32,912 $23,846 $15,357 $14,095 $13,749 $15,818 $17,024 $27,115 $39,390 Zone IV $17,837 $18,799 $18,166 $18,100 $15,327 $10,196 $6,447 $5,858 $6,212 $8,057 $9,144 $15,019 Total $182,494 $161,877 $145,054 $131,664 $98,502 $60,801 $78,896 $101,336 $116,761 $121,408 $160,182 $197,285 Percent
Zone I 31% 23% 23% 19% 19% 14% 56% 54% 55% 52% 46% 40%
Zone II 37% 42% 41% 43% 41% 44% 18% 26% 26% 27% 31% 33% Zone III 22% 23% 23% 25% 24% 25% 18% 14% 14% 14% 17% 20% Zone IV 10% 12% 13% 14% 16% 17% 8% 6% 5% 7% 6% 8%
Total 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% Summary for FY 201213
Zone I $558,298 36%
Zone II $537,953 35%
Zone III $310,845 20%
Zone IV $149,163 10%
Total $1,556,260 100%
Water Use in Each Zone *Water Use in Each Zone *Water Use in Each Zone *Water Use in Each Zone * Composite of CY 2012 and CY 2013 Data
Calendar Year 2012 Calendar Year 2013 59% of Total 41% of Total HCF Percent HCF Percent 2012 Use 2013 Use 7/1/2012 Percent Zone by Zone by Zone by Zone by Zone JulDec JanJun 6/30/2013 by Zone Zone I 716,415 10.3% 720,656 9.7% 422,685 295,469 718,154 9.6% Zone II 2,352,365 32.1% 2,375,199 30.9% 1,387,895 973,832 2,361,727 31.6% Zone III 3,324,520 45.1% 3,625,663 46.8% 1,961,467 1,486,522 3,447,989 46.1% Zone IV 926,458 12.5% 984,007 12.6% 546,610 403,443 950,053 12.7% Total 7,319,758 7,705,525 4,318,657 3,159,265 7,477,922 100.0% * HCF data for 2012 and 2013 is from the City's billing data and is based on sums using only the Zone codes.

Total HCF values based on Zone codes is slightly different from HCF data based on other billing codes and the DWR Form 38 water use data.

The percent by zone used in the development of rates is a composite of CY 2012 and CY 2013 data. Use in each zone for 2012 is estimated to be 59 percent of total 2012 use.

Use in each zone for FY 201213 is estimated to be 59 percent of total 2012 use plus 41 percent of total 2013 use.

Water and Sewer Rates and Capacity Charges Study

B
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document.

Appendix B: Water “Plant in Service Factors” and
Allocation of Costs

This Page Intentionally Blank.

Table B1
Water Fund 611 "Plant in Service" Factors
Capital Extra Capacity Meters and Billing
Useful Recovery Maximum Fire Service and
All Values in $million Valuation [1] Life, Expense [2] Base Day Protection Laterals Collection Basis of Allocation [3,4,5] Plant in Service Dollars Years Dollars (BAS) (XMD) (FP) (MTR) (CUS) (BAS) (XMD) (FP) (MTR) (CUS) Water Treatment Plant 37.000 50 2.027 1.212 0.774 0.041 60% 38% 2% Municipal Reservoir 24.000 50 1.315 0.786 0.502 0.026 60% 38% 2% E. & W. Canal Pump Stations 0.600 30 0.039 0.023 0.015 0.001 60% 38% 2% Clearwells 5.480 50 0.300 0.180 0.115 0.006 60% 38% 2%
Reservoirs 10.000 50 0.548 0.328 0.209 0.011 60% 38% 2% Booster Pump Stations 41.630 30 2.708 1.087 0.694 0.926 40% 26% 34% Pressure Reducing Valves 4.100 30 0.267 0.107 0.068 0.091 40% 26% 34% Transmission Pipes 73.338 50 4.017 1.613 1.030 1.374 40% 26% 34% Distribution Pipes >= 8" 217.671 40 12.685 5.094 3.253 4.338 40% 26% 34% Distribution Pipes <6" 160.000 40 9.325 5.690 3.634 61% 39% Hydrants 23.075 50 1.264 1.264 100%
Service Laterals 76.000 50 4.163 4.163 100%
Meters 24.320 30 1.582 1.582 100%
TotalsTotalsTotalsTotals 697.214697.214697.214697.214 40.23940.23940.23940.239 16.12116.12116.12116.121 10.29510.29510.29510.295 8.0788.0788.0788.078 5.7455.7455.7455.745 0.0000.0000.0000.000 % of Total 40% 26% 20% 14% 0%
Notes:
1 The list of Plant Assets, valuations and useful lives were provided by the City. 2 The capital recovery expense is the capital recovery factor times the present value of the asset.

The capital recovery factor is the ratio of a constant annuity to the present value of receiving that annuity for the useful life of the asset using the estimated real interest rate. The capital recovery expense is calculated using an interest rate of > 5.0% 3 The Fire Protection allocation for the Treatment Plant and Reservoir is based on the volume of water used for public and private fire protection. 4 Fire Protection allocation for Booster Pump Station, PRVs, Transmission Lines and Distribution Lines is based on concepts presented in the American Water Works Association, Manual of Water Supply Practices, M1 Principles of Water Rates, Fees, and Charges , 2012 Sixth Edition, page 143.

The allocation is calculated using a formula developed by the Insurance Services Office that relates the percentage of total revenue allocated as fire protection costs based on the population served.

Fire Demand = 1,020 x 1/2 (1 0.01x1/2) in gallons per minute (gpm) where x = population in thousands; x = 106 for the Antioch Service Area Fire Demand =
Maximum Day Demand = 26.1 mgd from the Water Master Plan, Table 3.1 Maximum Day Demand =
Fire Protection Allocation = 9,420 / (9,420 + 18,125)
Fire Protection Allocation = 34%
5 Base (BAS) and Maximum Day (XMD) allocations for Water Treatment facilities are calculated as shown below:

Average Day Demand = 15.9 mgd from the Water Master Plan, Table 3.1 Maximum Day Demand = 26.1 mgd 15.9

26.1 26.1 15.9

26.1 9,420 gpm
18,125 gpm
Base Allocation = 61.0%
Maximum Day Allocation = = 39.0%
=
Table B2
Water Fund 611 FY 201516 Cost Allocations, $
Budget Extra Zones II/III/IV Fire Meters and Customer
Projected Base Capacity Electricity Costs Protection Service Lat. Billing Expense Category 201516 (BAS) (CAP) (ELE) (FP) (MTR) (CUS) Basis of Allocation [1,2,3] Operating ExpensesOperating ExpensesOperating ExpensesOperating Expenses Supervision 3,243,751 1,821,166 1,163,085 0 0 259,500 0 "System Operation" Production, Serv & Supl 17,119,740 5,975,982 3,816,553 1,446,162 3,436,814 2,444,229 0 "Plant in Service" Production, Personnel 1,749,820 982,416 627,419 0 0 139,986 0 "System Operation" Distribution 6,336,539 3,557,575 2,272,041 0 0 506,923 0 "System Operation" Meter Reading 801,467 801,467 100% CUS
Warehouse/Stores 511,164 511,164 100% CUS
Additional Staffing 0 0 0 0 0 0 "Plant in Service"
Total OperatingTotal OperatingTotal OperatingTotal Operating 29,762,48129,762,48129,762,48129,762,481 12,337,13812,337,13812,337,13812,337,138 7,879,0977,879,0977,879,0977,879,097 1,446,1621,446,1621,446,1621,446,162 3,436,8143,436,8143,436,8143,436,814 3,350,6383,350,6383,350,6383,350,638 1,312,6311,312,6311,312,6311,312,631 Capital ExpensesCapital ExpensesCapital ExpensesCapital Expenses Personnel 124,060 49,701 31,741 24,905 17,712 0 "Plant in Service" Projects 1,160,000 464,720 296,793 232,872 165,616 0 "Plant in Service" Total CapitalTotal CapitalTotal CapitalTotal Capital 1,284,0601,284,0601,284,0601,284,060 514,420514,420514,420514,420 328,534328,534328,534328,534 00 00 257,777257,777257,777257,777 183,329183,329183,329183,329 00 00 Capital ReserveCapital ReserveCapital ReserveCapital Reserve 00 00 0 0 0 0 0 "Plant in Service" Total ExpendituresTotal ExpendituresTotal ExpendituresTotal Expenditures 31,046,541 31,046,54131,046,54131,046,541 12,851,55912,851,55912,851,55912,851,559 8,207,6318,207,6318,207,6318,207,631 1,446,1621,446,1621,446,1621,446,162 3,694,5923,694,5923,694,5923,694,592 3,533,9673,533,9673,533,9673,533,967 1,312,6311,312,6311,312,6311,312,631 REVENUE REQUIREMENT ALLOCATIONREVENUE REQUIREMENT ALLOCATIONREVENUE REQUIREMENT ALLOCATIONREVENUE REQUIREMENT ALLOCATION 41.4% 41.4%41.4%41.4% 26.4% 26.4%26.4%26.4% 4.7% 4.7% 4.7%4.7% 11.9% 11.9%11.9%11.9% 11.4% 11.4%11.4%11.4% 4.2% 4.2% 4.2%4.2% 1 The "Plant in Service" factor is from Table B1 and allocates costs as shown below. (BAS) (CAP) (ELE) (FP) (MTR) (CUS)
40% 26% na 20% 14% 0%
2 The "System Operations" factor is based on labor allocation for system operation. (BAS) (CAP) (ELE) (FP) (MTR) (CUS)
56% 36% 0% 0% 8% 0%
3 Allocations to BAS and CAP for Production are net of $1,446,162 for booster station and pump electric utility costs as shown below.

A) Calculate electricity costs for Zones I, II, III and IV % by Zone 201516 Electricity Costs
201213 All Zones
Zone I 36% $518,801
Zone II 35% $499,896
Zone III 20% $288,854
Zone IV 10% $138,610
Total $1,446,162
B) Adjust Production BAS and CAP allocations to exclude electricity costs for Zones I, II, III and IV (BAS) (CAP) Total BAS + CAP
40% 26% 66%
Production BAS and CAP only > $6,858,515 $4,380,181 $11,238,696 % Allocation between Production BAS and CAP > 61% 39%
Electricity costs for Zones I, II, III and IV > $882,533 $563,629 $1,446,162 Production BAS and CAP net of electricity costs > $5,975,982 $3,816,553 $9,792,535 Water and Sewer Rates and Capacity Charges Study

C
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document.

Appendix C: Water Quantity, Meter and Private Fire
Service Charges Development Tables

This Page Intentionally Blank.

Table C1
Development of Elevation Charges for Zones II, III and IV Projected Fiscal Year
Allocation Category Notes 201516 201617 201718 201819 201920 Units of Use (HCF) [1] 6,550,000 6,410,000 6,270,000 6,140,000 6,010,000 Use by Zone allocation %
Zone I 10% 629,000 616,000 602,000 590,000 577,000
Zone II 32% 2,069,000 2,024,000 1,980,000 1,939,000 1,898,000 Zone III 46% 3,020,000 2,956,000 2,891,000 2,831,000 2,771,000 Zone IV 13% 832,000 814,000 797,000 780,000 764,000
Electricity Costs [2,3] $1,446,000 $1,504,000 $1,564,000 $1,627,000 $1,692,000 Costs by Zone allocation %
Zone I 36% $519,000 $540,000 $561,000 $584,000 $607,000 Zone II 35% $500,000 $520,000 $541,000 $562,000 $585,000 Zone III 20% $289,000 $300,000 $312,000 $325,000 $338,000 Zone IV 10% $139,000 $144,000 $150,000 $156,000 $162,000 Development of Elevation Zone Charges for Zone I, Zone II, Zone III and Zone IV Water Thru Zone I
Electricity Costs, dollars $519,000 $540,000 $561,000 $584,000 $607,000 Water Use, HCF
Zone I 6,550,000 6,410,000 6,270,000 6,140,000 6,010,000 Zone I Charge, $/HCFZone I Charge, $/HCFZone I Charge, $/HCFZone I Charge, $/HCF not rounded > $0.079$0.079$0.079$0.079 $0.084$0.084$0.084$0.084 $0.089$0.089$0.089$0.089 $0.095$0.095$0.095$0.095 $0.101$0.101$0.101$0.101 Water Thru Zone II
Electricity Costs, dollars $500,000 $520,000 $541,000 $562,000 $585,000 Water Use, HCF
Zone II 2,069,000 2,024,000 1,980,000 1,939,000 1,898,000 Zone III 3,020,000 2,956,000 2,891,000 2,831,000 2,771,000 Zone IV 832,000 814,000 797,000 780,000 764,000
Total Water Use 5,921,000 5,794,000 5,668,000 5,550,000 5,433,000 Zone II Charge, $/HCFZone II Charge, $/HCFZone II Charge, $/HCFZone II Charge, $/HCF not rounded > $0.084$0.084$0.084$0.084 $0.090$0.090$0.090$0.090 $0.095$0.095$0.095$0.095 $0.101$0.101$0.101$0.101 $0.108$0.108$0.108$0.108 Water Thru Zone III
Electricity Costs, dollars $289,000 $300,000 $312,000 $325,000 $338,000 Water Use, HCF
Zone III 3,020,000 2,956,000 2,891,000 2,831,000 2,771,000 Zone IV 832,000 814,000 797,000 780,000 764,000
Total Water Use 3,852,000 3,770,000 3,688,000 3,611,000 3,535,000 Zone III Charge, $/HCFZone III Charge, $/HCFZone III Charge, $/HCFZone III Charge, $/HCF not rounded > $0.075$0.075$0.075$0.075 $0.080$0.080$0.080$0.080 $0.085$0.085$0.085$0.085 $0.090$0.090$0.090$0.090 $0.096$0.096$0.096$0.096 Water Thru Zone IV
Electricity Costs, dollars $139,000 $144,000 $150,000 $156,000 $162,000 Water Use, HCF
Zone IV 832,000 814,000 797,000 780,000 764,000
Zone IV Charge, $/HCFZone IV Charge, $/HCFZone IV Charge, $/HCFZone IV Charge, $/HCF not rounded > $0.167$0.167$0.167$0.167 $0.177$0.177$0.177$0.177 $0.188$0.188$0.188$0.188 $0.200$0.200$0.200$0.200 $0.212$0.212$0.212$0.212 Elevation Zone Charges, $/HCF
Zone
Zone IZone IZone IZone I roundup to $0.01 > $0.08$0.08$0.08$0.08 $0.09$0.09$0.09$0.09 $0.09$0.09$0.09$0.09 $0.10$0.10$0.10$0.10 $0.11$0.11$0.11$0.11 Zone IIZone IIZone IIZone II roundup to $0.01 > $0.09$0.09$0.09$0.09 $0.09$0.09$0.09$0.09 $0.10$0.10$0.10$0.10 $0.11$0.11$0.11$0.11 $0.11$0.11$0.11$0.11 Zone IIIZone IIIZone IIIZone III roundup to $0.01 > $0.16$0.16$0.16$0.16 $0.17$0.17$0.17$0.17 $0.19$0.19$0.19$0.19 $0.20$0.20$0.20$0.20 $0.21$0.21$0.21$0.21 Zone IVZone IVZone IVZone IV roundup to $0.01 > $0.33$0.33$0.33$0.33 $0.35$0.35$0.35$0.35 $0.37$0.37$0.37$0.37 $0.40$0.40$0.40$0.40 $0.42$0.42$0.42$0.42 Notes:
1 Allocation of water use among zones is based on data shown in Table A2. 2 Electricity costs for 201516 are estimated as described below.

A) Estimate change in water use from 201213 to 201516 Actual Estimated 201213 201516 % Change
Water Use in All Zones > 7,477,922 6,550,000 12.4%
B) Apply percent change in water use from 201213 to 201516 to calculate 201516 electricity costs in 2013 dollars Actual Estimated (2013$)
201213 % Change 201516
Estimated Electricity Costs in 2013 dollars, All Zones > $1,556,260 12.4% $1,363,146 C) Adjust 201516 electricity costs in 2013 dollars by 3 percent for two years to current dollars Estimated (2013$) Estimated (2015$)
201516 % Change 201516
Estimated Electricity Costs in 2015 dollars, All Zones > $1,363,146 6.1% $1,446,162 round to $000 > $1,446,000
3 Electricity costs for 201617 onward are the previous years' value escalated by 4%.

Table C2
Quantity Charges
Projected Fiscal Year
Cost Category 201516 201617 201718 201819 201920
Unit Costs
Avg Base Rate ($/HCF) $1.77 $1.92 $2.22 $2.42 $2.65
Avg Extra Capacity Rate ($/HCF) $1.13 $1.22 $1.41 $1.53 $1.68 Zone I Electricity ($/HCF) $0.08 $0.09 $0.09 $0.10 $0.11 Zone I (=Total) $2.99 $3.24 $3.73 $4.05 $4.44
Zone II $0.09 $0.09 $0.10 $0.11 $0.11
Zone III $0.16 $0.17 $0.19 $0.20 $0.21
Zone IV $0.33 $0.35 $0.37 $0.40 $0.42
Zone Costs
Zone I $2.99 $3.24 $3.73 $4.05 $4.44
Zone II $3.08 $3.33 $3.83 $4.16 $4.55
Zone III $3.15 $3.41 $3.92 $4.25 $4.65
Zone IV $3.32 $3.59 $4.10 $4.45 $4.86
Table C3
Single Family Inclining Block Quantity Charges
Item 201516 201617 201718 201819 201920
Single Family Water Use Characteristics
Average Annual Water Use
Annual Water Use, Percent
Percent Less Than or Equal to Average (Tier 1) 70% 70% 70% 70% 70% Percent Greater Average (Tier 2) 30% 30% 30% 30% 30%
Tier Breaks
Tier 1 0 13 HCF 0 13 HCF 0 12 HCF 0 12 HCF 0 12 HCF Tier 2 > 13 HCF > 13 HCF > 12 HCF > 12 HCF > 12 HCF
Annual Water Use, HCF
Total 4,396,149 4,297,290 4,203,965 4,112,373 4,025,841 Tier 1 3,077,304 3,008,103 2,942,776 2,878,661 2,818,089 Tier 2 1,318,845 1,289,187 1,261,190 1,233,712 1,207,752 Single Family Revenue Requirements
Base Cost Allocation
Total All Users, Dollars $11,610,000 $12,314,000 $13,927,000 $14,836,000 $15,909,000 Single Family Allocation based on Water Use
Percent 67.1% 67.0% 67.0% 67.0% 67.0%
Dollars $7,792,257 $8,255,355 $9,337,899 $9,936,671 $10,656,757 Extra Capacity Cost Allocation
Total All Users, Dollars $7,415,000 $7,837,000 $8,864,000 $9,410,000 $10,090,000 Single Family Allocation based on Water Use
Percent 67.1% 67.0% 67.0% 67.0% 67.0%
Dollars $4,976,709 $5,253,956 $5,943,213 $6,302,513 $6,758,858 Single Family Inclining Block Quantity Charges, $/HCF
Uniform Quantity Charge
Base Component
Dollar Allocation $7,792,257 $8,255,355 $9,337,899 $9,936,671 $10,656,757 Single Family Water Use 4,396,149 4,297,290 4,203,965 4,112,373 4,025,841 Base Unit Cost $1.77 $1.92 $2.22 $2.42 $2.65
Extra Capacity Component
Dollar Allocation $4,976,709 $5,253,956 $5,943,213 $6,302,513 $6,758,858 Single Family Water Use 4,396,149 4,297,290 4,203,965 4,112,373 4,025,841 Extra Capacity Unit Cost $1.13 $1.22 $1.41 $1.53 $1.68
Uniform Quantity Charge (Base + Extra Capacity Components)Uniform Quantity Charge (Base + Extra Capacity Components)Uniform Quantity Charge (Base + Extra Capacity Components)Uniform Quantity Charge (Base + Extra Capacity Components) $2.91$2.91$2.91$2.91 $3.15$3.15$3.15$3.15 $3.64$3.64$3.64$3.64 $3.95$3.95$3.95$3.95 $4.33$4.33$4.33$4.33 Inclining Block Quantity Charges
Tier 1 (Base Component Dollars)
Dollar Allocation $7,792,257 $8,255,355 $9,337,899 $9,936,671 $10,656,757 Single Family Water Use in Tier 1 3,077,304 3,008,103 2,942,776 2,878,661 2,818,089 Tier 1 Quantity ChargeTier 1 Quantity ChargeTier 1 Quantity ChargeTier 1 Quantity Charge $2.53$2.53$2.53$2.53 $2.74$2.74$2.74$2.74 $3.17$3.17$3.17$3.17 $3.45$3.45$3.45$3.45 $3.78$3.78$3.78$3.78 Tier 2 (Extra Capacity Component Dollars)
Dollar Allocation $4,976,709 $5,253,956 $5,943,213 $6,302,513 $6,758,858 Single Family Water Use w/Uniform Rate 1,318,845 1,289,187 1,261,190 1,233,712 1,207,752 % Reduction in Use 10% 10% 10% 10% 10%
Single Family Water Use in Tier 2 w/Inclining Block 1,186,960 1,160,268 1,135,071 1,110,341 1,086,977 Tier 2 Quantity ChargeTier 2 Quantity ChargeTier 2 Quantity ChargeTier 2 Quantity Charge $4.19$4.19$4.19$4.19 $4.53$4.53$4.53$4.53 $5.24$5.24$5.24$5.24 $5.68$5.68$5.68$5.68 $6.22$6.22$6.22$6.22 Table C4
Meter Service Charges
Projected Fiscal Year
Cost Category 201516 201617 201718 201819 201920
Unit Costs
Fire Protection Rate ($/eq. mtrmonth) $7.28 $7.88 $8.85 $9.62 $10.25 Meter/Lateral Rate ($/eq. mtrmonth) $6.96 $7.54 $8.48 $9.22 $9.82 Account Rate ($/acctmonth) $3.22 $3.41 $3.83 $4.07 $4.33 Metered Service Meter Ratio
⅝ x ¾inch 1.00 $17.50 $18.80 $21.20 $22.90 $24.40
1inch 2.53 $39.30 $42.50 $47.70 $52.00 $55.00
1½inch 5.00 $74.00 $81.00 $90.00 $98.00 $105.00
2inch 8.00 $117.00 $127.00 $142.00 $155.00 $165.00
3inch 15.00 $217.00 $235.00 $264.00 $287.00 $305.00
4inch 25.00 $359.00 $389.00 $437.00 $475.00 $506.00
6inch 50.00 $715.00 $775.00 $870.00 $946.00 $1,008.00
8inch 80.00 $1,142.00 $1,237.00 $1,390.00 $1,512.00 $1,610.00 10inch 115.00 $1,640.00 $1,777.00 $1,997.00 $2,171.00 $2,312.00 12inch 165.00 $2,352.00 $2,548.00 $2,864.00 $3,113.00 $3,315.00 Water and Sewer Rates and Capacity Charges Study

D
DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document.

Appendix D: Single Family Monthly Water Bills Tables

This Page Intentionally Blank.

Table D1
Single Family Uniform Quantity Charges
CURRENT RATES RECOMMENDED RATES FY 201516
⅝ x ¾inch Quantity Charge ⅝ x ¾inch Quantity Charge Zone II Monthly Meter Zone I Zone II Zone III Zone IV Meter Zone I Zone II Zone III Zone IV Change In Water Use Service $0.09 $0.22 $0.50 Total Monthly Bill Service $0.09 $0.16 $0.33 Total Monthly Bill Monthly Bill HCF gpd $15.60 $2.42 $2.51 $2.64 $2.92 Zone I Zone II Zone III Zone IV $17.50 Uniform > $2.99 $3.08 $3.15 $3.32 Zone I Zone II Zone III Zone IV Dollar % 0 0 $15.60 $0.00 $0.00 $0.00 $0.00 $15.60 $15.60 $15.60 $15.60 $17.50 $0.00 $0.00 $0.00 $0.00 $17.50 $17.50 $17.50 $17.50 $1.90 12% 1 25 $15.60 $2.42 $2.51 $2.64 $2.92 $18.02 $18.11 $18.24 $18.52 $17.50 $2.99 $3.08 $3.15 $3.32 $20.49 $20.58 $20.65 $20.82 $2.47 14% 2 49 $15.60 $4.84 $5.02 $5.28 $5.84 $20.44 $20.62 $20.88 $21.44 $17.50 $5.98 $6.16 $6.30 $6.64 $23.48 $23.66 $23.80 $24.14 $3.04 15% 3 74 $15.60 $7.26 $7.53 $7.92 $8.76 $22.86 $23.13 $23.52 $24.36 $17.50 $8.97 $9.24 $9.45 $9.96 $26.47 $26.74 $26.95 $27.46 $3.61 16% 4 98 $15.60 $9.68 $10.04 $10.56 $11.68 $25.28 $25.64 $26.16 $27.28 $17.50 $11.96 $12.32 $12.60 $13.28 $29.46 $29.82 $30.10 $30.78 $4.18 16% 5 123 $15.60 $12.10 $12.55 $13.20 $14.60 $27.70 $28.15 $28.80 $30.20 $17.50 $14.95 $15.40 $15.75 $16.60 $32.45 $32.90 $33.25 $34.10 $4.75 17% 6 148 $15.60 $14.52 $15.06 $15.84 $17.52 $30.12 $30.66 $31.44 $33.12 $17.50 $17.94 $18.48 $18.90 $19.92 $35.44 $35.98 $36.40 $37.42 $5.32 17% 7 172 $15.60 $16.94 $17.57 $18.48 $20.44 $32.54 $33.17 $34.08 $36.04 $17.50 $20.93 $21.56 $22.05 $23.24 $38.43 $39.06 $39.55 $40.74 $5.89 18% 8 197 $15.60 $19.36 $20.08 $21.12 $23.36 $34.96 $35.68 $36.72 $38.96 $17.50 $23.92 $24.64 $25.20 $26.56 $41.42 $42.14 $42.70 $44.06 $6.46 18% 9 221 $15.60 $21.78 $22.59 $23.76 $26.28 $37.38 $38.19 $39.36 $41.88 $17.50 $26.91 $27.72 $28.35 $29.88 $44.41 $45.22 $45.85 $47.38 $7.03 18% 10 246 $15.60 $24.20 $25.10 $26.40 $29.20 $39.80 $40.70 $42.00 $44.80 $17.50 $29.90 $30.80 $31.50 $33.20 $47.40 $48.30 $49.00 $50.70 $7.60 19% 11 271 $15.60 $26.62 $27.61 $29.04 $32.12 $42.22 $43.21 $44.64 $47.72 $17.50 $32.89 $33.88 $34.65 $36.52 $50.39 $51.38 $52.15 $54.02 $8.17 19% 12 295 $15.60 $29.04 $30.12 $31.68 $35.04 $44.64 $45.72 $47.28 $50.64 $17.50 $35.88 $36.96 $37.80 $39.84 $53.38 $54.46 $55.30 $57.34 $8.74 19% 13 320 $15.60 $31.46 $32.63 $34.32 $37.96 $47.06 $48.23 $49.92 $53.56 $17.50 $38.87 $40.04 $40.95 $43.16 $56.37 $57.54 $58.45 $60.66 $9.31 19% 14 344 $15.60 $33.88 $35.14 $36.96 $40.88 $49.48 $50.74 $52.56 $56.48 $17.50 $41.86 $43.12 $44.10 $46.48 $59.36 $60.62 $61.60 $63.98 $9.88 19% 15 369 $15.60 $36.30 $37.65 $39.60 $43.80 $51.90 $53.25 $55.20 $59.40 $17.50 $44.85 $46.20 $47.25 $49.80 $62.35 $63.70 $64.75 $67.30 $10.45 20% 16 394 $15.60 $38.72 $40.16 $42.24 $46.72 $54.32 $55.76 $57.84 $62.32 $17.50 $47.84 $49.28 $50.40 $53.12 $65.34 $66.78 $67.90 $70.62 $11.02 20% 17 418 $15.60 $41.14 $42.67 $44.88 $49.64 $56.74 $58.27 $60.48 $65.24 $17.50 $50.83 $52.36 $53.55 $56.44 $68.33 $69.86 $71.05 $73.94 $11.59 20% 18 443 $15.60 $43.56 $45.18 $47.52 $52.56 $59.16 $60.78 $63.12 $68.16 $17.50 $53.82 $55.44 $56.70 $59.76 $71.32 $72.94 $74.20 $77.26 $12.16 20% 19 467 $15.60 $45.98 $47.69 $50.16 $55.48 $61.58 $63.29 $65.76 $71.08 $17.50 $56.81 $58.52 $59.85 $63.08 $74.31 $76.02 $77.35 $80.58 $12.73 20% 20 492 $15.60 $48.40 $50.20 $52.80 $58.40 $64.00 $65.80 $68.40 $74.00 $17.50 $59.80 $61.60 $63.00 $66.40 $77.30 $79.10 $80.50 $83.90 $13.30 20% 21 516 $15.60 $50.82 $52.71 $55.44 $61.32 $66.42 $68.31 $71.04 $76.92 $17.50 $62.79 $64.68 $66.15 $69.72 $80.29 $82.18 $83.65 $87.22 $13.87 20% 22 541 $15.60 $53.24 $55.22 $58.08 $64.24 $68.84 $70.82 $73.68 $79.84 $17.50 $65.78 $67.76 $69.30 $73.04 $83.28 $85.26 $86.80 $90.54 $14.44 20% 23 566 $15.60 $55.66 $57.73 $60.72 $67.16 $71.26 $73.33 $76.32 $82.76 $17.50 $68.77 $70.84 $72.45 $76.36 $86.27 $88.34 $89.95 $93.86 $15.01 20% 24 590 $15.60 $58.08 $60.24 $63.36 $70.08 $73.68 $75.84 $78.96 $85.68 $17.50 $71.76 $73.92 $75.60 $79.68 $89.26 $91.42 $93.10 $97.18 $15.58 21% 25 615 $15.60 $60.50 $62.75 $66.00 $73.00 $76.10 $78.35 $81.60 $88.60 $17.50 $74.75 $77.00 $78.75 $83.00 $92.25 $94.50 $96.25 $100.50 $16.15 21% 26 639 $15.60 $62.92 $65.26 $68.64 $75.92 $78.52 $80.86 $84.24 $91.52 $17.50 $77.74 $80.08 $81.90 $86.32 $95.24 $97.58 $99.40 $103.82 $16.72 21% 27 664 $15.60 $65.34 $67.77 $71.28 $78.84 $80.94 $83.37 $86.88 $94.44 $17.50 $80.73 $83.16 $85.05 $89.64 $98.23 $100.66 $102.55 $107.14 $17.29 21% 28 689 $15.60 $67.76 $70.28 $73.92 $81.76 $83.36 $85.88 $89.52 $97.36 $17.50 $83.72 $86.24 $88.20 $92.96 $101.22 $103.74 $105.70 $110.46 $17.86 21% 29 713 $15.60 $70.18 $72.79 $76.56 $84.68 $85.78 $88.39 $92.16 $100.28 $17.50 $86.71 $89.32 $91.35 $96.28 $104.21 $106.82 $108.85 $113.78 $18.43 21% 30 738 $15.60 $72.60 $75.30 $79.20 $87.60 $88.20 $90.90 $94.80 $103.20 $17.50 $89.70 $92.40 $94.50 $99.60 $107.20 $109.90 $112.00 $117.10 $19.00 21% 31 762 $15.60 $75.02 $77.81 $81.84 $90.52 $90.62 $93.41 $97.44 $106.12 $17.50 $92.69 $95.48 $97.65 $102.92 $110.19 $112.98 $115.15 $120.42 $19.57 21% 32 787 $15.60 $77.44 $80.32 $84.48 $93.44 $93.04 $95.92 $100.08 $109.04 $17.50 $95.68 $98.56 $100.80 $106.24 $113.18 $116.06 $118.30 $123.74 $20.14 21% 33 812 $15.60 $79.86 $82.83 $87.12 $96.36 $95.46 $98.43 $102.72 $111.96 $17.50 $98.67 $101.64 $103.95 $109.56 $116.17 $119.14 $121.45 $127.06 $20.71 21% 34 836 $15.60 $82.28 $85.34 $89.76 $99.28 $97.88 $100.94 $105.36 $114.88 $17.50 $101.66 $104.72 $107.10 $112.88 $119.16 $122.22 $124.60 $130.38 $21.28 21% 35 861 $15.60 $84.70 $87.85 $92.40 $102.20 $100.30 $103.45 $108.00 $117.80 $17.50 $104.65 $107.80 $110.25 $116.20 $122.15 $125.30 $127.75 $133.70 $21.85 21% 36 885 $15.60 $87.12 $90.36 $95.04 $105.12 $102.72 $105.96 $110.64 $120.72 $17.50 $107.64 $110.88 $113.40 $119.52 $125.14 $128.38 $130.90 $137.02 $22.42 21% 37 910 $15.60 $89.54 $92.87 $97.68 $108.04 $105.14 $108.47 $113.28 $123.64 $17.50 $110.63 $113.96 $116.55 $122.84 $128.13 $131.46 $134.05 $140.34 $22.99 21% 38 935 $15.60 $91.96 $95.38 $100.32 $110.96 $107.56 $110.98 $115.92 $126.56 $17.50 $113.62 $117.04 $119.70 $126.16 $131.12 $134.54 $137.20 $143.66 $23.56 21% 39 959 $15.60 $94.38 $97.89 $102.96 $113.88 $109.98 $113.49 $118.56 $129.48 $17.50 $116.61 $120.12 $122.85 $129.48 $134.11 $137.62 $140.35 $146.98 $24.13 21% 40 984 $15.60 $96.80 $100.40 $105.60 $116.80 $112.40 $116.00 $121.20 $132.40 $17.50 $119.60 $123.20 $126.00 $132.80 $137.10 $140.70 $143.50 $150.30 $24.70 21% 41 1,008 $15.60 $99.22 $102.91 $108.24 $119.72 $114.82 $118.51 $123.84 $135.32 $17.50 $122.59 $126.28 $129.15 $136.12 $140.09 $143.78 $146.65 $153.62 $25.27 21% 42 1,033 $15.60 $101.64 $105.42 $110.88 $122.64 $117.24 $121.02 $126.48 $138.24 $17.50 $125.58 $129.36 $132.30 $139.44 $143.08 $146.86 $149.80 $156.94 $25.84 21% 43 1,058 $15.60 $104.06 $107.93 $113.52 $125.56 $119.66 $123.53 $129.12 $141.16 $17.50 $128.57 $132.44 $135.45 $142.76 $146.07 $149.94 $152.95 $160.26 $26.41 21% 44 1,082 $15.60 $106.48 $110.44 $116.16 $128.48 $122.08 $126.04 $131.76 $144.08 $17.50 $131.56 $135.52 $138.60 $146.08 $149.06 $153.02 $156.10 $163.58 $26.98 21% 45 1,107 $15.60 $108.90 $112.95 $118.80 $131.40 $124.50 $128.55 $134.40 $147.00 $17.50 $134.55 $138.60 $141.75 $149.40 $152.05 $156.10 $159.25 $166.90 $27.55 21% 46 1,131 $15.60 $111.32 $115.46 $121.44 $134.32 $126.92 $131.06 $137.04 $149.92 $17.50 $137.54 $141.68 $144.90 $152.72 $155.04 $159.18 $162.40 $170.22 $28.12 21% 47 1,156 $15.60 $113.74 $117.97 $124.08 $137.24 $129.34 $133.57 $139.68 $152.84 $17.50 $140.53 $144.76 $148.05 $156.04 $158.03 $162.26 $165.55 $173.54 $28.69 21% 48 1,181 $15.60 $116.16 $120.48 $126.72 $140.16 $131.76 $136.08 $142.32 $155.76 $17.50 $143.52 $147.84 $151.20 $159.36 $161.02 $165.34 $168.70 $176.86 $29.26 22% 49 1,205 $15.60 $118.58 $122.99 $129.36 $143.08 $134.18 $138.59 $144.96 $158.68 $17.50 $146.51 $150.92 $154.35 $162.68 $164.01 $168.42 $171.85 $180.18 $29.83 22% 50 1,230 $15.60 $121.00 $125.50 $132.00 $146.00 $136.60 $141.10 $147.60 $161.60 $17.50 $149.50 $154.00 $157.50 $166.00 $167.00 $171.50 $175.00 $183.50 $30.40 22% Table D2
Single Family Inclining Block Quantity Charges
CURRENT RATES RECOMMENDED RATES FY 201516
Quantity Charge
⅝ x ¾inch Quantity Charge ⅝ x ¾inch Zone I Zone II Zone III Zone IV Zone II Monthly Meter Zone I Zone II Zone III Zone IV Meter $0.09 $0.16 $0.33 Change In Water Use Service $0.09 $0.22 $0.50 Total Monthly Bill Service Tier 1 > $2.53 $2.62 $2.69 $2.86 Total Monthly Bill Monthly Bill HCF gpd $15.60 $2.42 $2.51 $2.64 $2.92 Zone I Zone II Zone III Zone IV $17.50 Tier 2 > $4.19 $4.28 $4.35 $4.52 Zone I Zone II Zone III Zone IV Dollar % 0 0 $15.60 $0.00 $0.00 $0.00 $0.00 $15.60 $15.60 $15.60 $15.60 $17.50 $0.00 $0.00 $0.00 $0.00 $17.50 $17.50 $17.50 $17.50 $1.90 12% 1 25 $15.60 $2.42 $2.51 $2.64 $2.92 $18.02 $18.11 $18.24 $18.52 $17.50 $2.53 $2.62 $2.69 $2.86 $20.03 $20.12 $20.19 $20.36 $2.01 11% 2 49 $15.60 $4.84 $5.02 $5.28 $5.84 $20.44 $20.62 $20.88 $21.44 $17.50 $5.06 $5.24 $5.38 $5.72 $22.56 $22.74 $22.88 $23.22 $2.12 10% 3 74 $15.60 $7.26 $7.53 $7.92 $8.76 $22.86 $23.13 $23.52 $24.36 $17.50 $7.59 $7.86 $8.07 $8.58 $25.09 $25.36 $25.57 $26.08 $2.23 10% 4 98 $15.60 $9.68 $10.04 $10.56 $11.68 $25.28 $25.64 $26.16 $27.28 $17.50 $10.12 $10.48 $10.76 $11.44 $27.62 $27.98 $28.26 $28.94 $2.34 9% 5 123 $15.60 $12.10 $12.55 $13.20 $14.60 $27.70 $28.15 $28.80 $30.20 $17.50 $12.65 $13.10 $13.45 $14.30 $30.15 $30.60 $30.95 $31.80 $2.45 9% 6 148 $15.60 $14.52 $15.06 $15.84 $17.52 $30.12 $30.66 $31.44 $33.12 $17.50 $15.18 $15.72 $16.14 $17.16 $32.68 $33.22 $33.64 $34.66 $2.56 8% 7 172 $15.60 $16.94 $17.57 $18.48 $20.44 $32.54 $33.17 $34.08 $36.04 $17.50 $17.71 $18.34 $18.83 $20.02 $35.21 $35.84 $36.33 $37.52 $2.67 8% 8 197 $15.60 $19.36 $20.08 $21.12 $23.36 $34.96 $35.68 $36.72 $38.96 $17.50 $20.24 $20.96 $21.52 $22.88 $37.74 $38.46 $39.02 $40.38 $2.78 8% 9 221 $15.60 $21.78 $22.59 $23.76 $26.28 $37.38 $38.19 $39.36 $41.88 $17.50 $22.77 $23.58 $24.21 $25.74 $40.27 $41.08 $41.71 $43.24 $2.89 8% 10 246 $15.60 $24.20 $25.10 $26.40 $29.20 $39.80 $40.70 $42.00 $44.80 $17.50 $25.30 $26.20 $26.90 $28.60 $42.80 $43.70 $44.40 $46.10 $3.00 7% 11 271 $15.60 $26.62 $27.61 $29.04 $32.12 $42.22 $43.21 $44.64 $47.72 $17.50 $27.83 $28.82 $29.59 $31.46 $45.33 $46.32 $47.09 $48.96 $3.11 7% 12 295 $15.60 $29.04 $30.12 $31.68 $35.04 $44.64 $45.72 $47.28 $50.64 $17.50 $30.36 $31.44 $32.28 $34.32 $47.86 $48.94 $49.78 $51.82 $3.22 7% 13 320 $15.60 $31.46 $32.63 $34.32 $37.96 $47.06 $48.23 $49.92 $53.56 $17.50 $32.89 $34.06 $34.97 $37.18 $50.39 $51.56 $52.47 $54.68 $3.33 7% 14 344 $15.60 $33.88 $35.14 $36.96 $40.88 $49.48 $50.74 $52.56 $56.48 $17.50 $37.08 $38.34 $39.32 $41.70 $54.58 $55.84 $56.82 $59.20 $5.10 10% 15 369 $15.60 $36.30 $37.65 $39.60 $43.80 $51.90 $53.25 $55.20 $59.40 $17.50 $41.27 $42.62 $43.67 $46.22 $58.77 $60.12 $61.17 $63.72 $6.87 13% 16 394 $15.60 $38.72 $40.16 $42.24 $46.72 $54.32 $55.76 $57.84 $62.32 $17.50 $45.46 $46.90 $48.02 $50.74 $62.96 $64.40 $65.52 $68.24 $8.64 15% 17 418 $15.60 $41.14 $42.67 $44.88 $49.64 $56.74 $58.27 $60.48 $65.24 $17.50 $49.65 $51.18 $52.37 $55.26 $67.15 $68.68 $69.87 $72.76 $10.41 18% 18 443 $15.60 $43.56 $45.18 $47.52 $52.56 $59.16 $60.78 $63.12 $68.16 $17.50 $53.84 $55.46 $56.72 $59.78 $71.34 $72.96 $74.22 $77.28 $12.18 20% 19 467 $15.60 $45.98 $47.69 $50.16 $55.48 $61.58 $63.29 $65.76 $71.08 $17.50 $58.03 $59.74 $61.07 $64.30 $75.53 $77.24 $78.57 $81.80 $13.95 22% 20 492 $15.60 $48.40 $50.20 $52.80 $58.40 $64.00 $65.80 $68.40 $74.00 $17.50 $62.22 $64.02 $65.42 $68.82 $79.72 $81.52 $82.92 $86.32 $15.72 24% 21 516 $15.60 $50.82 $52.71 $55.44 $61.32 $66.42 $68.31 $71.04 $76.92 $17.50 $66.41 $68.30 $69.77 $73.34 $83.91 $85.80 $87.27 $90.84 $17.49 26% 22 541 $15.60 $53.24 $55.22 $58.08 $64.24 $68.84 $70.82 $73.68 $79.84 $17.50 $70.60 $72.58 $74.12 $77.86 $88.10 $90.08 $91.62 $95.36 $19.26 27% 23 566 $15.60 $55.66 $57.73 $60.72 $67.16 $71.26 $73.33 $76.32 $82.76 $17.50 $74.79 $76.86 $78.47 $82.38 $92.29 $94.36 $95.97 $99.88 $21.03 29% 24 590 $15.60 $58.08 $60.24 $63.36 $70.08 $73.68 $75.84 $78.96 $85.68 $17.50 $78.98 $81.14 $82.82 $86.90 $96.48 $98.64 $100.32 $104.40 $22.80 30% 25 615 $15.60 $60.50 $62.75 $66.00 $73.00 $76.10 $78.35 $81.60 $88.60 $17.50 $83.17 $85.42 $87.17 $91.42 $100.67 $102.92 $104.67 $108.92 $24.57 31% 26 639 $15.60 $62.92 $65.26 $68.64 $75.92 $78.52 $80.86 $84.24 $91.52 $17.50 $87.36 $89.70 $91.52 $95.94 $104.86 $107.20 $109.02 $113.44 $26.34 33% 27 664 $15.60 $65.34 $67.77 $71.28 $78.84 $80.94 $83.37 $86.88 $94.44 $17.50 $91.55 $93.98 $95.87 $100.46 $109.05 $111.48 $113.37 $117.96 $28.11 34% 28 689 $15.60 $67.76 $70.28 $73.92 $81.76 $83.36 $85.88 $89.52 $97.36 $17.50 $95.74 $98.26 $100.22 $104.98 $113.24 $115.76 $117.72 $122.48 $29.88 35% 29 713 $15.60 $70.18 $72.79 $76.56 $84.68 $85.78 $88.39 $92.16 $100.28 $17.50 $99.93 $102.54 $104.57 $109.50 $117.43 $120.04 $122.07 $127.00 $31.65 36% 30 738 $15.60 $72.60 $75.30 $79.20 $87.60 $88.20 $90.90 $94.80 $103.20 $17.50 $104.12 $106.82 $108.92 $114.02 $121.62 $124.32 $126.42 $131.52 $33.42 37% 31 762 $15.60 $75.02 $77.81 $81.84 $90.52 $90.62 $93.41 $97.44 $106.12 $17.50 $108.31 $111.10 $113.27 $118.54 $125.81 $128.60 $130.77 $136.04 $35.19 38% 32 787 $15.60 $77.44 $80.32 $84.48 $93.44 $93.04 $95.92 $100.08 $109.04 $17.50 $112.50 $115.38 $117.62 $123.06 $130.00 $132.88 $135.12 $140.56 $36.96 39% 33 812 $15.60 $79.86 $82.83 $87.12 $96.36 $95.46 $98.43 $102.72 $111.96 $17.50 $116.69 $119.66 $121.97 $127.58 $134.19 $137.16 $139.47 $145.08 $38.73 39% 34 836 $15.60 $82.28 $85.34 $89.76 $99.28 $97.88 $100.94 $105.36 $114.88 $17.50 $120.88 $123.94 $126.32 $132.10 $138.38 $141.44 $143.82 $149.60 $40.50 40% 35 861 $15.60 $84.70 $87.85 $92.40 $102.20 $100.30 $103.45 $108.00 $117.80 $17.50 $125.07 $128.22 $130.67 $136.62 $142.57 $145.72 $148.17 $154.12 $42.27 41% 36 885 $15.60 $87.12 $90.36 $95.04 $105.12 $102.72 $105.96 $110.64 $120.72 $17.50 $129.26 $132.50 $135.02 $141.14 $146.76 $150.00 $152.52 $158.64 $44.04 42% 37 910 $15.60 $89.54 $92.87 $97.68 $108.04 $105.14 $108.47 $113.28 $123.64 $17.50 $133.45 $136.78 $139.37 $145.66 $150.95 $154.28 $156.87 $163.16 $45.81 42% 38 935 $15.60 $91.96 $95.38 $100.32 $110.96 $107.56 $110.98 $115.92 $126.56 $17.50 $137.64 $141.06 $143.72 $150.18 $155.14 $158.56 $161.22 $167.68 $47.58 43% 39 959 $15.60 $94.38 $97.89 $102.96 $113.88 $109.98 $113.49 $118.56 $129.48 $17.50 $141.83 $145.34 $148.07 $154.70 $159.33 $162.84 $165.57 $172.20 $49.35 43% 40 984 $15.60 $96.80 $100.40 $105.60 $116.80 $112.40 $116.00 $121.20 $132.40 $17.50 $146.02 $149.62 $152.42 $159.22 $163.52 $167.12 $169.92 $176.72 $51.12 44% 41 1,008 $15.60 $99.22 $102.91 $108.24 $119.72 $114.82 $118.51 $123.84 $135.32 $17.50 $150.21 $153.90 $156.77 $163.74 $167.71 $171.40 $174.27 $181.24 $52.89 45% 42 1,033 $15.60 $101.64 $105.42 $110.88 $122.64 $117.24 $121.02 $126.48 $138.24 $17.50 $154.40 $158.18 $161.12 $168.26 $171.90 $175.68 $178.62 $185.76 $54.66 45% 43 1,058 $15.60 $104.06 $107.93 $113.52 $125.56 $119.66 $123.53 $129.12 $141.16 $17.50 $158.59 $162.46 $165.47 $172.78 $176.09 $179.96 $182.97 $190.28 $56.43 46% 44 1,082 $15.60 $106.48 $110.44 $116.16 $128.48 $122.08 $126.04 $131.76 $144.08 $17.50 $162.78 $166.74 $169.82 $177.30 $180.28 $184.24 $187.32 $194.80 $58.20 46% 45 1,107 $15.60 $108.90 $112.95 $118.80 $131.40 $124.50 $128.55 $134.40 $147.00 $17.50 $166.97 $171.02 $174.17 $181.82 $184.47 $188.52 $191.67 $199.32 $59.97 47% 46 1,131 $15.60 $111.32 $115.46 $121.44 $134.32 $126.92 $131.06 $137.04 $149.92 $17.50 $171.16 $175.30 $178.52 $186.34 $188.66 $192.80 $196.02 $203.84 $61.74 47% 47 1,156 $15.60 $113.74 $117.97 $124.08 $137.24 $129.34 $133.57 $139.68 $152.84 $17.50 $175.35 $179.58 $182.87 $190.86 $192.85 $197.08 $200.37 $208.36 $63.51 48% 48 1,181 $15.60 $116.16 $120.48 $126.72 $140.16 $131.76 $136.08 $142.32 $155.76 $17.50 $179.54 $183.86 $187.22 $195.38 $197.04 $201.36 $204.72 $212.88 $65.28 48% 49 1,205 $15.60 $118.58 $122.99 $129.36 $143.08 $134.18 $138.59 $144.96 $158.68 $17.50 $183.73 $188.14 $191.57 $199.90 $201.23 $205.64 $209.07 $217.40 $67.05 48% 50 1,230 $15.60 $121.00 $125.50 $132.00 $146.00 $136.60 $141.10 $147.60 $161.60 $17.50 $187.92 $192.42 $195.92 $204.42 $205.42 $209.92 $213.42 $221.92 $68.82 49% Table D3
Single Family Monthly Bills Comparison
Current Uniform v Recommended Uniform Quantity Charges

UNIFORM
CURRENT RATES RECOMMENDED RATES FY 201516
Monthly
Water Use Total Monthly Bill Total Monthly Bill Dollar Change Percent Change HCF gpd Zone I Zone II Zone III Zone IV Zone I Zone II Zone III Zone IV Zone I Zone II Zone III Zone IV Zone I Zone II Zone III Zone IV 0 0 $15.60 $15.60 $15.60 $15.60 $17.50 $17.50 $17.50 $17.50 $1.90 $1.90 $1.90 $1.90 12% 12% 12% 12% 1 25 $18.02 $18.11 $18.24 $18.52 $20.49 $20.58 $20.65 $20.82 $2.47 $2.47 $2.41 $2.30 14% 14% 13% 12% 2 49 $20.44 $20.62 $20.88 $21.44 $23.48 $23.66 $23.80 $24.14 $3.04 $3.04 $2.92 $2.70 15% 15% 14% 13% 3 74 $22.86 $23.13 $23.52 $24.36 $26.47 $26.74 $26.95 $27.46 $3.61 $3.61 $3.43 $3.10 16% 16% 15% 13% 4 98 $25.28 $25.64 $26.16 $27.28 $29.46 $29.82 $30.10 $30.78 $4.18 $4.18 $3.94 $3.50 17% 16% 15% 13% 5 123 $27.70 $28.15 $28.80 $30.20 $32.45 $32.90 $33.25 $34.10 $4.75 $4.75 $4.45 $3.90 17% 17% 15% 13% 6 148 $30.12 $30.66 $31.44 $33.12 $35.44 $35.98 $36.40 $37.42 $5.32 $5.32 $4.96 $4.30 18% 17% 16% 13% 7 172 $32.54 $33.17 $34.08 $36.04 $38.43 $39.06 $39.55 $40.74 $5.89 $5.89 $5.47 $4.70 18% 18% 16% 13% 8 197 $34.96 $35.68 $36.72 $38.96 $41.42 $42.14 $42.70 $44.06 $6.46 $6.46 $5.98 $5.10 18% 18% 16% 13% 9 221 $37.38 $38.19 $39.36 $41.88 $44.41 $45.22 $45.85 $47.38 $7.03 $7.03 $6.49 $5.50 19% 18% 16% 13% 10 246 $39.80 $40.70 $42.00 $44.80 $47.40 $48.30 $49.00 $50.70 $7.60 $7.60 $7.00 $5.90 19% 19% 17% 13% 11 271 $42.22 $43.21 $44.64 $47.72 $50.39 $51.38 $52.15 $54.02 $8.17 $8.17 $7.51 $6.30 19% 19% 17% 13% 12 295 $44.64 $45.72 $47.28 $50.64 $53.38 $54.46 $55.30 $57.34 $8.74 $8.74 $8.02 $6.70 20% 19% 17% 13% 13 320 $47.06 $48.23 $49.92 $53.56 $56.37 $57.54 $58.45 $60.66 $9.31 $9.31 $8.53 $7.10 20% 19% 17% 13% 14 344 $49.48 $50.74 $52.56 $56.48 $59.36 $60.62 $61.60 $63.98 $9.88 $9.88 $9.04 $7.50 20% 19% 17% 13% 15 369 $51.90 $53.25 $55.20 $59.40 $62.35 $63.70 $64.75 $67.30 $10.45 $10.45 $9.55 $7.90 20% 20% 17% 13% 16 394 $54.32 $55.76 $57.84 $62.32 $65.34 $66.78 $67.90 $70.62 $11.02 $11.02 $10.06 $8.30 20% 20% 17% 13% 17 418 $56.74 $58.27 $60.48 $65.24 $68.33 $69.86 $71.05 $73.94 $11.59 $11.59 $10.57 $8.70 20% 20% 17% 13% 18 443 $59.16 $60.78 $63.12 $68.16 $71.32 $72.94 $74.20 $77.26 $12.16 $12.16 $11.08 $9.10 21% 20% 18% 13% 19 467 $61.58 $63.29 $65.76 $71.08 $74.31 $76.02 $77.35 $80.58 $12.73 $12.73 $11.59 $9.50 21% 20% 18% 13% 20 492 $64.00 $65.80 $68.40 $74.00 $77.30 $79.10 $80.50 $83.90 $13.30 $13.30 $12.10 $9.90 21% 20% 18% 13% 21 516 $66.42 $68.31 $71.04 $76.92 $80.29 $82.18 $83.65 $87.22 $13.87 $13.87 $12.61 $10.30 21% 20% 18% 13% 22 541 $68.84 $70.82 $73.68 $79.84 $83.28 $85.26 $86.80 $90.54 $14.44 $14.44 $13.12 $10.70 21% 20% 18% 13% 23 566 $71.26 $73.33 $76.32 $82.76 $86.27 $88.34 $89.95 $93.86 $15.01 $15.01 $13.63 $11.10 21% 20% 18% 13% 24 590 $73.68 $75.84 $78.96 $85.68 $89.26 $91.42 $93.10 $97.18 $15.58 $15.58 $14.14 $11.50 21% 21% 18% 13% 25 615 $76.10 $78.35 $81.60 $88.60 $92.25 $94.50 $96.25 $100.50 $16.15 $16.15 $14.65 $11.90 21% 21% 18% 13% 26 639 $78.52 $80.86 $84.24 $91.52 $95.24 $97.58 $99.40 $103.82 $16.72 $16.72 $15.16 $12.30 21% 21% 18% 13% 27 664 $80.94 $83.37 $86.88 $94.44 $98.23 $100.66 $102.55 $107.14 $17.29 $17.29 $15.67 $12.70 21% 21% 18% 13% 28 689 $83.36 $85.88 $89.52 $97.36 $101.22 $103.74 $105.70 $110.46 $17.86 $17.86 $16.18 $13.10 21% 21% 18% 13% 29 713 $85.78 $88.39 $92.16 $100.28 $104.21 $106.82 $108.85 $113.78 $18.43 $18.43 $16.69 $13.50 21% 21% 18% 13% 30 738 $88.20 $90.90 $94.80 $103.20 $107.20 $109.90 $112.00 $117.10 $19.00 $19.00 $17.20 $13.90 22% 21% 18% 13% 31 762 $90.62 $93.41 $97.44 $106.12 $110.19 $112.98 $115.15 $120.42 $19.57 $19.57 $17.71 $14.30 22% 21% 18% 13% 32 787 $93.04 $95.92 $100.08 $109.04 $113.18 $116.06 $118.30 $123.74 $20.14 $20.14 $18.22 $14.70 22% 21% 18% 13% 33 812 $95.46 $98.43 $102.72 $111.96 $116.17 $119.14 $121.45 $127.06 $20.71 $20.71 $18.73 $15.10 22% 21% 18% 13% 34 836 $97.88 $100.94 $105.36 $114.88 $119.16 $122.22 $124.60 $130.38 $21.28 $21.28 $19.24 $15.50 22% 21% 18% 13% 35 861 $100.30 $103.45 $108.00 $117.80 $122.15 $125.30 $127.75 $133.70 $21.85 $21.85 $19.75 $15.90 22% 21% 18% 13% 36 885 $102.72 $105.96 $110.64 $120.72 $125.14 $128.38 $130.90 $137.02 $22.42 $22.42 $20.26 $16.30 22% 21% 18% 14% 37 910 $105.14 $108.47 $113.28 $123.64 $128.13 $131.46 $134.05 $140.34 $22.99 $22.99 $20.77 $16.70 22% 21% 18% 14% 38 935 $107.56 $110.98 $115.92 $126.56 $131.12 $134.54 $137.20 $143.66 $23.56 $23.56 $21.28 $17.10 22% 21% 18% 14% 39 959 $109.98 $113.49 $118.56 $129.48 $134.11 $137.62 $140.35 $146.98 $24.13 $24.13 $21.79 $17.50 22% 21% 18% 14% 40 984 $112.40 $116.00 $121.20 $132.40 $137.10 $140.70 $143.50 $150.30 $24.70 $24.70 $22.30 $17.90 22% 21% 18% 14% 41 1,008 $114.82 $118.51 $123.84 $135.32 $140.09 $143.78 $146.65 $153.62 $25.27 $25.27 $22.81 $18.30 22% 21% 18% 14% 42 1,033 $117.24 $121.02 $126.48 $138.24 $143.08 $146.86 $149.80 $156.94 $25.84 $25.84 $23.32 $18.70 22% 21% 18% 14% 43 1,058 $119.66 $123.53 $129.12 $141.16 $146.07 $149.94 $152.95 $160.26 $26.41 $26.41 $23.83 $19.10 22% 21% 18% 14% 44 1,082 $122.08 $126.04 $131.76 $144.08 $149.06 $153.02 $156.10 $163.58 $26.98 $26.98 $24.34 $19.50 22% 21% 18% 14% 45 1,107 $124.50 $128.55 $134.40 $147.00 $152.05 $156.10 $159.25 $166.90 $27.55 $27.55 $24.85 $19.90 22% 21% 18% 14% 46 1,131 $126.92 $131.06 $137.04 $149.92 $155.04 $159.18 $162.40 $170.22 $28.12 $28.12 $25.36 $20.30 22% 21% 19% 14% 47 1,156 $129.34 $133.57 $139.68 $152.84 $158.03 $162.26 $165.55 $173.54 $28.69 $28.69 $25.87 $20.70 22% 21% 19% 14% 48 1,181 $131.76 $136.08 $142.32 $155.76 $161.02 $165.34 $168.70 $176.86 $29.26 $29.26 $26.38 $21.10 22% 22% 19% 14% 49 1,205 $134.18 $138.59 $144.96 $158.68 $164.01 $168.42 $171.85 $180.18 $29.83 $29.83 $26.89 $21.50 22% 22% 19% 14% 50 1,230 $136.60 $141.10 $147.60 $161.60 $167.00 $171.50 $175.00 $183.50 $30.40 $30.40 $27.40 $21.90 22% 22% 19% 14% Table D4
Single Family Monthly Bills Comparison
Current Uniform v Recommended Inclining Block Quantity Charges

INCLINING BLOCK
CURRENT RATES RECOMMENDED RATES FY 201516
Monthly
Water Use Total Monthly Bill Total Monthly Bill Dollar Change Percent Change HCF gpd Zone I Zone II Zone III Zone IV Zone I Zone II Zone III Zone IV Zone I Zone II Zone III Zone IV Zone I Zone II Zone III Zone IV 0 0 $15.60 $15.60 $15.60 $15.60 $17.50 $17.50 $17.50 $17.50 $1.90 $1.90 $1.90 $1.90 12% 12% 12% 12% 1 25 $18.02 $18.11 $18.24 $18.52 $20.03 $20.12 $20.19 $20.36 $2.01 $2.01 $1.95 $1.84 11% 11% 11% 10% 2 49 $20.44 $20.62 $20.88 $21.44 $22.56 $22.74 $22.88 $23.22 $2.12 $2.12 $2.00 $1.78 10% 10% 10% 8% 3 74 $22.86 $23.13 $23.52 $24.36 $25.09 $25.36 $25.57 $26.08 $2.23 $2.23 $2.05 $1.72 10% 10% 9% 7% 4 98 $25.28 $25.64 $26.16 $27.28 $27.62 $27.98 $28.26 $28.94 $2.34 $2.34 $2.10 $1.66 9% 9% 8% 6% 5 123 $27.70 $28.15 $28.80 $30.20 $30.15 $30.60 $30.95 $31.80 $2.45 $2.45 $2.15 $1.60 9% 9% 7% 5% 6 148 $30.12 $30.66 $31.44 $33.12 $32.68 $33.22 $33.64 $34.66 $2.56 $2.56 $2.20 $1.54 8% 8% 7% 5% 7 172 $32.54 $33.17 $34.08 $36.04 $35.21 $35.84 $36.33 $37.52 $2.67 $2.67 $2.25 $1.48 8% 8% 7% 4% 8 197 $34.96 $35.68 $36.72 $38.96 $37.74 $38.46 $39.02 $40.38 $2.78 $2.78 $2.30 $1.42 8% 8% 6% 4% 9 221 $37.38 $38.19 $39.36 $41.88 $40.27 $41.08 $41.71 $43.24 $2.89 $2.89 $2.35 $1.36 8% 8% 6% 3% 10 246 $39.80 $40.70 $42.00 $44.80 $42.80 $43.70 $44.40 $46.10 $3.00 $3.00 $2.40 $1.30 8% 7% 6% 3% 11 271 $42.22 $43.21 $44.64 $47.72 $45.33 $46.32 $47.09 $48.96 $3.11 $3.11 $2.45 $1.24 7% 7% 5% 3% 12 295 $44.64 $45.72 $47.28 $50.64 $47.86 $48.94 $49.78 $51.82 $3.22 $3.22 $2.50 $1.18 7% 7% 5% 2% 13 320 $47.06 $48.23 $49.92 $53.56 $50.39 $51.56 $52.47 $54.68 $3.33 $3.33 $2.55 $1.12 7% 7% 5% 2% 14 344 $49.48 $50.74 $52.56 $56.48 $54.58 $55.84 $56.82 $59.20 $5.10 $5.10 $4.26 $2.72 10% 10% 8% 5% 15 369 $51.90 $53.25 $55.20 $59.40 $58.77 $60.12 $61.17 $63.72 $6.87 $6.87 $5.97 $4.32 13% 13% 11% 7% 16 394 $54.32 $55.76 $57.84 $62.32 $62.96 $64.40 $65.52 $68.24 $8.64 $8.64 $7.68 $5.92 16% 15% 13% 9% 17 418 $56.74 $58.27 $60.48 $65.24 $67.15 $68.68 $69.87 $72.76 $10.41 $10.41 $9.39 $7.52 18% 18% 16% 12% 18 443 $59.16 $60.78 $63.12 $68.16 $71.34 $72.96 $74.22 $77.28 $12.18 $12.18 $11.10 $9.12 21% 20% 18% 13% 19 467 $61.58 $63.29 $65.76 $71.08 $75.53 $77.24 $78.57 $81.80 $13.95 $13.95 $12.81 $10.72 23% 22% 19% 15% 20 492 $64.00 $65.80 $68.40 $74.00 $79.72 $81.52 $82.92 $86.32 $15.72 $15.72 $14.52 $12.32 25% 24% 21% 17% 21 516 $66.42 $68.31 $71.04 $76.92 $83.91 $85.80 $87.27 $90.84 $17.49 $17.49 $16.23 $13.92 26% 26% 23% 18% 22 541 $68.84 $70.82 $73.68 $79.84 $88.10 $90.08 $91.62 $95.36 $19.26 $19.26 $17.94 $15.52 28% 27% 24% 19% 23 566 $71.26 $73.33 $76.32 $82.76 $92.29 $94.36 $95.97 $99.88 $21.03 $21.03 $19.65 $17.12 30% 29% 26% 21% 24 590 $73.68 $75.84 $78.96 $85.68 $96.48 $98.64 $100.32 $104.40 $22.80 $22.80 $21.36 $18.72 31% 30% 27% 22% 25 615 $76.10 $78.35 $81.60 $88.60 $100.67 $102.92 $104.67 $108.92 $24.57 $24.57 $23.07 $20.32 32% 31% 28% 23% 26 639 $78.52 $80.86 $84.24 $91.52 $104.86 $107.20 $109.02 $113.44 $26.34 $26.34 $24.78 $21.92 34% 33% 29% 24% 27 664 $80.94 $83.37 $86.88 $94.44 $109.05 $111.48 $113.37 $117.96 $28.11 $28.11 $26.49 $23.52 35% 34% 30% 25% 28 689 $83.36 $85.88 $89.52 $97.36 $113.24 $115.76 $117.72 $122.48 $29.88 $29.88 $28.20 $25.12 36% 35% 32% 26% 29 713 $85.78 $88.39 $92.16 $100.28 $117.43 $120.04 $122.07 $127.00 $31.65 $31.65 $29.91 $26.72 37% 36% 32% 27% 30 738 $88.20 $90.90 $94.80 $103.20 $121.62 $124.32 $126.42 $131.52 $33.42 $33.42 $31.62 $28.32 38% 37% 33% 27% 31 762 $90.62 $93.41 $97.44 $106.12 $125.81 $128.60 $130.77 $136.04 $35.19 $35.19 $33.33 $29.92 39% 38% 34% 28% 32 787 $93.04 $95.92 $100.08 $109.04 $130.00 $132.88 $135.12 $140.56 $36.96 $36.96 $35.04 $31.52 40% 39% 35% 29% 33 812 $95.46 $98.43 $102.72 $111.96 $134.19 $137.16 $139.47 $145.08 $38.73 $38.73 $36.75 $33.12 41% 39% 36% 30% 34 836 $97.88 $100.94 $105.36 $114.88 $138.38 $141.44 $143.82 $149.60 $40.50 $40.50 $38.46 $34.72 41% 40% 37% 30% 35 861 $100.30 $103.45 $108.00 $117.80 $142.57 $145.72 $148.17 $154.12 $42.27 $42.27 $40.17 $36.32 42% 41% 37% 31% 36 885 $102.72 $105.96 $110.64 $120.72 $146.76 $150.00 $152.52 $158.64 $44.04 $44.04 $41.88 $37.92 43% 42% 38% 31% 37 910 $105.14 $108.47 $113.28 $123.64 $150.95 $154.28 $156.87 $163.16 $45.81 $45.81 $43.59 $39.52 44% 42% 38% 32% 38 935 $107.56 $110.98 $115.92 $126.56 $155.14 $158.56 $161.22 $167.68 $47.58 $47.58 $45.30 $41.12 44% 43% 39% 32% 39 959 $109.98 $113.49 $118.56 $129.48 $159.33 $162.84 $165.57 $172.20 $49.35 $49.35 $47.01 $42.72 45% 43% 40% 33% 40 984 $112.40 $116.00 $121.20 $132.40 $163.52 $167.12 $169.92 $176.72 $51.12 $51.12 $48.72 $44.32 45% 44% 40% 33% 41 1,008 $114.82 $118.51 $123.84 $135.32 $167.71 $171.40 $174.27 $181.24 $52.89 $52.89 $50.43 $45.92 46% 45% 41% 34% 42 1,033 $117.24 $121.02 $126.48 $138.24 $171.90 $175.68 $178.62 $185.76 $54.66 $54.66 $52.14 $47.52 47% 45% 41% 34% 43 1,058 $119.66 $123.53 $129.12 $141.16 $176.09 $179.96 $182.97 $190.28 $56.43 $56.43 $53.85 $49.12 47% 46% 42% 35% 44 1,082 $122.08 $126.04 $131.76 $144.08 $180.28 $184.24 $187.32 $194.80 $58.20 $58.20 $55.56 $50.72 48% 46% 42% 35% 45 1,107 $124.50 $128.55 $134.40 $147.00 $184.47 $188.52 $191.67 $199.32 $59.97 $59.97 $57.27 $52.32 48% 47% 43% 36% 46 1,131 $126.92 $131.06 $137.04 $149.92 $188.66 $192.80 $196.02 $203.84 $61.74 $61.74 $58.98 $53.92 49% 47% 43% 36% 47 1,156 $129.34 $133.57 $139.68 $152.84 $192.85 $197.08 $200.37 $208.36 $63.51 $63.51 $60.69 $55.52 49% 48% 43% 36% 48 1,181 $131.76 $136.08 $142.32 $155.76 $197.04 $201.36 $204.72 $212.88 $65.28 $65.28 $62.40 $57.12 50% 48% 44% 37% 49 1,205 $134.18 $138.59 $144.96 $158.68 $201.23 $205.64 $209.07 $217.40 $67.05 $67.05 $64.11 $58.72 50% 48% 44% 37% 50 1,230 $136.60 $141.10 $147.60 $161.60 $205.42 $209.92 $213.42 $221.92 $68.82 $68.82 $65.82 $60.32 50% 49% 45% 37% Water and Sewer Rates and Capacity Charges Study

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DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document.

Appendix E: Historic and Projected Wastewater Flow

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Table E1
Historic and Projected Wastewater Discharge
Item 2011 2012 2013 201415 201516 201617 201718 201819 201920 Wastewater Discharge, HCF [1]
Single Family 2,884,026 3,311,424 3,354,264 2,926,245 2,914,757 2,902,728 2,892,631 2,881,934 2,873,048 Multi Family 445,296 471,300 453,378 245,575 245,575 245,575 245,575 245,575 245,575 Apartments/ Mobile Homes 249,724 249,724 249,724 249,724 249,724 249,724 Commercial/ Institutional 407,766 451,032 439,746 407,766 399,611 395,615 391,658 387,742 383,864 Industrial 328,698 121,781 101,649 121,781 101,649 100,633 99,626 98,630 97,644 Other 11,482 11,105 16,262 11,105 11,105 10,994 10,884 10,775 10,667 Total 4,077,268 4,366,642 4,365,299 3,962,196 3,922,420 3,905,268 3,890,099 3,874,380 3,860,523 Total, rounded 4,080,000 4,370,000 4,370,000 3,960,000 3,920,000 3,910,000 3,890,000 3,870,000 3,860,000 Total, million gallons 3,050 3,267 3,266 2,964 2,934 2,922 2,910 2,898 2,888 Total, gallons per day 8,360,000 8,950,000 8,950,000 8,120,000 8,040,000 8,000,000 7,970,000 7,940,000 7,910,000 Accounts/Units [2]
Single Family 28,287 28,466 28,488 28,560 28,785 29,010 29,260 29,510 29,785 Multi Family 690 690 688 2,996 2,996 2,996 2,996 2,996 2,996 Apartments/Mobile Homes 3,736 3,736 3,736 3,736 3,736 3,736 Commercial/Institutional 1,446 1,446 1,446 1,446 1,446 1,446 1,446 1,446 1,446 Industrial 13 13 13 13 13 13 13 13 13
Other 47 47 47 47 47 47 47 47 47
Total 30,483 30,662 30,682 36,798 37,023 37,248 37,498 37,748 38,023 Average Wastewater Discharge HCF/mo [3,4]
Single Family 8.5 9.7 9.8 8.5 8.4 8.3 8.2 8.1 8.0
Multi Family 54 57 55 6.8 6.8 6.8 6.8 6.8 6.8
Apartments/Mobile Homes 5.6 5.6 5.6 5.6 5.6 5.6
Commercial/Institutional 23 26 25 23 23 23 23 22 22
Industrial 2,107 781 652 781 652 645 639 632 626
Other 20 20 29 20 20 19 19 19 19
Notes:
1 Wastewater discharge for 2011 2013 is based on annualized winter water use data from City data. Values for FY 201415 onward are projected. 2 The number of accounts for 2011 2013 are from City data. Accounts and Dwelling Units for 201415 are based on City billing system data.

The number of additional accounts for FY 201516 onward are projected as shown below. 201516 201617 201718 201819 201920
Single Family 225 225 250 250 275
All Other Customer Classes 0 0 0 0 0
3 Average wastewater discharge for residential accounts for FY 201415 is based on the average flows listed below for each customer class.

Single Family Multi Family Apts/MH
average annual gallons per day > 210 168 137
average annual HCF/month > 8.5 6.8 5.6
4 Average use for FY 201516 onward was developed by the Consultant. 201516 201617 201718 201819 201920
Single Family 1.2% 1.2% 1.2% 1.2% 1.2%
Multiple Family 0.0% 0.0% 0.0% 0.0% 0.0%
Apartments / Mobile Homes 0.0% 0.0% 0.0% 0.0% 0.0%
All Other Customer Classes 2.0% 1.0% 1.0% 1.0% 1.0% 0 1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
2011 2012 2013 201415 201516 201617 201718 201819 2019 20 Hundred Cubic Feet (HCF)
Other
Industrial
Commercial/
Institutional
Apartments/
Mobile Homes
Multi Family
Single Family
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Water and Sewer Rates and Capacity Charges Study

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Appendix F: Water Capacity Charge Tables

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Table F1
Water System Assets Valuation
Assessment District
Item Description Code Capacity Unit Cost Valuation % $
1 Municipal Reservoir mres 240 mg $75,000 $18,000,000
2 24" Raw Water Pipe Segment 1RP rw 200 lf $567 $113,000 3 30" Raw Water Pipe Segment 2RP rw 12,400 lf $743 $9,218,000 4 18" Raw Water Pipe Segment 3RP rw 4,230 lf $567 $2,398,000 5 20" Raw Water Pipe Segment 4RP rw 2,400 lf $567 $1,361,000 6 24" Raw Water Pipe Segment 5TP rw 250 lf $567 $142,000 7 24" Raw Water Pipe Segment 6ETP rw 2,890 lf $567 $1,639,000 8 24" Raw Water Pipe Segment 7ETP rw 340 lf $567 $193,000 9 24" Raw Water Pipe Segment 8ETP rw 2,340 lf $567 $1,327,000 10 39" Raw Water Pipe Segment 9WTP rw 1,970 lf $929 $1,831,000 11 39" Raw Water Pipe Segment 10WTP rw 3,730 lf $929 $3,466,000 12 W. Canal Pump Station ps 20.2 mgd $150,000 $3,030,000 13 E. Canal Pump Station ps 7.2 mgd $200,000 $1,440,000 14 Water Treatment Plant tmt 37.0 mgd $2,330,000 $86,210,000 15 Clearwell A clr 1.0 mg included in WTP $0
16 Clearwell B clr 2.0 mg included in WTP $0
17 "D" Street Reservoir res 1.0 mg $2,300,000 $2,300,000 18 0.5 MG Reservoir res 0.5 mg $2,800,000 $1,400,000
19 3.0 MG Reservoir res 3.0 mg $1,500,000 $4,500,000
20 Donlon Reservoir res 2.0 mg $1,900,000 $3,800,000
21 Larkspur Reservoir res 2.0 mg $1,900,000 $3,800,000
22 Hillcrest Reservoir res 2.5 mg $1,600,000 $4,000,000 23 Lone Tree Reservoir res 2.5 mg $1,700,000 $4,250,000 100% $4,250,000 24 Cambridge Reservoir res 2.5 mg $1,600,000 $4,000,000 25 Empire Mine Reservoir res 3.5 mg $1,400,000 $4,900,000 100% $4,900,000 26 Mira Vista Hills Reservoir res 0.5 mg $4,300,000 $2,150,000 27 Zone I BPS bps 8.5 mg decommissioned $0
28 Zone II BPS A bps 39.7 mg included in WTP $0
29 Zone II BPS B bps mg included in WTP $0
30 Wilber Avenue BPS bps 5.8 mg $520,000 $3,016,000
31 Hillcrest BPS bps 4.3 mg $580,000 $2,494,000
32 Lone Tree BPS No. 1 bps 5.2 mg $580,000 $3,016,000 100% $3,016,000 33 Lone Tree BPS No. 2 bps 10.4 mg $390,000 $4,056,000 100% $4,056,000 34 Donlon BPS bps 2.6 mg $580,000 $1,508,000
35 Dallas Ranch BPS bps 6.0 mg $520,000 $3,120,000 100% $3,120,000 36 Cambridge BPS bps 0.36 mg $520,000 $187,000
37 Bear Ridge BPS bps 0.2 mg $3,500,000 $700,000
38 Sunset Lane BPS bps 0.2 mg $3,500,000 $700,000
39 6inch Pressure Reducing Valves prv 6 lot $100,000 $600,000 40 8inch Pressure Reducing Valves prv 5 lot $120,000 $600,000 41 12inch Pressure Reducing Valves prv 3 lot $150,000 $450,000 42 Hydrants hyd 3,550 lot $6,500 $23,075,000
43 Service Laterals lat 30,400 lot $2,500 $76,000,000
44 Meters mtr 30,400 lot $800 $24,320,000
Total $309,310,000
Summary
Water Treatment Plant $86,210,000 $0
Raw Water Pipelines $21,688,000 $0
Municipal Reservoir $18,000,000 $0
E. & W. Canal Pump Stations $4,470,000 $0
Clearwells $0 $0
Reservoirs $35,100,000 $9,150,000
Booster Pump Stations $18,797,000 $10,192,000
Pressure Reducing Valves $1,650,000 $0
Hydrants $23,075,000 $0
Service Laterals $76,000,000 $0
Meters $24,320,000 $0
Total $309,310,000 $19,342,000
Source: The capacity of assets is from the Water System Master Plan Update August 2014 prepared for the City of Antioch by Brown and Caldwell.

The valuation of assets and assessment district contributions was provided by Brown and Caldwell separate from the Master Plan.

Table F2
Water System Pipeline Lengths and Value by Diameter by Pressure Zone Pressure 4inch Diameter 6inch 8inch 10inch 12inch 14 to 16inch 20 to 24inch 30 to 36inch Total Zone or Smaller Diameter Diameter Diameter Diameter Diameter Diameter Diameter Lineal Feet Miles I 9,140 68,449 92,786 23,983 28,108 18 9,394 231,878 43.9 II 10,115 159,785 216,597 59,047 69,205 51,340 18,843 1,786 586,718 111.1 IIA 6,262 8,489 2,078 2,435 19,264 3.6
IIB 2,661 3,607 2,269 2,660 11,197 2.1
IIC 1,050 3,689 5,001 1,289 1,511 12,540 2.4
III East 1,894 146,791 198,981 70,177 82,250 68,458 23,736 592,287 112.2 III West 45 25,800 34,972 7,600 8,907 7,416 84,740 16.0 IV East 39,449 53,475 26,924 31,555 19,030 5,135 175,568 33.3 IV West 8,480 11,494 5,593 6,556 4,045 36,168 6.9 Sunset 776 1,052 943 1,106 3,877 0.7
Bear Ridge 30 764 1,036 1,013 1,187 4,030 0.8
Total 22,274 462,906 627,490 200,917 235,479 150,307 57,108 1,786 1,758,267 333.0 Capital Cost, $/lf $264 $264 $277 $307 $343 $360 $405 $531 Valuation $5,880,336 $122,207,135 $173,814,782 $61,681,433 $80,769,394 $54,110,520 $23,128,740 $948,366 $522,540,705 Contributions/Assessment District
% Asst. District 0% 0% 0% 0% 50% 60% 50% 100% $85,363,745 % Contribution 100% 100% 90% 7% 7% 7% 7% 0% $299,899,080 Total $5,880,336 $122,207,135 $156,433,303 $4,317,700 $46,038,554 $36,254,048 $13,183,382 $948,366 $385,262,825 Source: Pipe lengths are from Table 24 of the Water System Master Plan Update August 2014 (Master Plan) prepared for the City of Antioch by Brown and Caldwell.

Categories for 6 and 8inch pipe and 10 and 12inch pipe shown in the Master Plan were subdivided by Brown and Caldwell in a separate evaluation. < 4inch 6inch 8inch 10inch 12inch 14 to 16inch 20 to 24inch 30 to 36inch Pipe cost, $/ft > $161 $161 $170 $190 $214 $225 $255 $339 Contingency > 25% 25% 25% 25% 25% 25% 25% 25%
Engineering > 20% 20% 20% 20% 20% 20% 20% 20%
Traffic ctrl, $/ft > $22 $22 $22 $22 $22 $22 $22 $22
Capital cost, $/ft > $264 $264 $277 $307 $343 $360 $405 $531 Cost per LF values shown above are based on values listed in Table 72 of the Master Plan.

Note: The percent contributions by developers were provided by the City. The percent assessment district contributions were provided by Brown and Caldwell.

Table F3
Contribution of Water Facility Reserve Fees
ENR 20 City Construction Cost Index (CCI)
Estimated Facility Reserve Fees and Revenues [1,2] ENR Factor Escalated Number of Index Based on Contribution
Year Fees New Connections Revenues at Year End 9806 CCI Values 2014 6,181 225 $1,390,700 9,806 1.000 $1,390,700
2013 6,036 289 $1,744,500 9,543 1.028 $1,792,606
2012 5,734 169 $969,000 9,338 1.050 $1,017,598
2011 4,560 139 $633,800 9,070 1.081 $685,278
2010 4,560 207 $943,900 8,804 1.114 $1,051,363
2009 4,560 170 $775,200 8,570 1.144 $887,035
2008 4,560 236 $1,076,200 8,310 1.180 $1,270,008
2007 4,560 209 $953,000 7,967 1.231 $1,173,050
2006 4,560 351 $1,600,600 7,751 1.265 $2,024,997
2005 4,560 392 $1,787,500 7,446 1.317 $2,354,139
2004 4,560 112 $510,700 7,115 1.378 $703,882
2003 3,003 630 $1,891,600 6,694 1.465 $2,771,134
2002 3,003 630 $1,891,600 6,538 1.500 $2,837,254
2001 2,965 630 $1,868,000 6,342 1.546 $2,888,448
2000 2,965 630 $1,868,000 6,221 1.576 $2,944,629
1999 2,913 630 $1,834,900 6,060 1.618 $2,969,297
1998 2,875 630 $1,811,300 5,920 1.657 $3,000,424
1997 2,838 630 $1,787,600 5,825 1.684 $3,009,458
1996 2,838 630 $1,787,600 5,620 1.745 $3,119,234
1995 2,838 630 $1,787,600 5,471 1.792 $3,204,185
1994 2,703 630 $1,702,600 5,408 1.813 $3,087,378
1993 2,605 630 $1,641,200 5,210 1.882 $3,089,141
1992 2,185 630 $1,376,600 4,985 1.967 $2,708,049
1991 2,065 630 $1,301,000 4,835 2.028 $2,638,728
1990 2,065 630 $1,301,000 4,732 2.072 $2,696,165
1989 2,065 630 $1,301,000 4,615 2.125 $2,764,518
1988 2,022 630 $1,273,900 4,519 2.170 $2,764,438
1987 1,971 630 $1,242,000 4,406 2.226 $2,764,337
1986 1,922 630 $1,210,700 4,295 2.283 $2,764,313
1985 1,877 630 $1,182,600 4,195 2.338 $2,764,520
1984 1,855 630 $1,168,700 4,146 2.365 $2,764,316
1983 1,819 630 $1,146,200 4,066 2.412 $2,764,438
1982 1,712 630 $1,078,300 3,825 2.564 $2,764,535
1981 1,582 630 $996,500 3,535 2.774 $2,764,406
1980 1,448 630 $912,500 3,237 3.030 $2,764,420
1979 1,344 630 $846,500 3,003 3.266 $2,764,302
1978 1,242 630 $782,500 2,776 3.533 $2,764,259
1977 1,153 630 $726,200 2,576 3.807 $2,764,549
1976 1,074 630 $676,800 2,401 4.084 $2,764,280
1975 990 630 $623,600 2,212 4.433 $2,764,616
1974 904 630 $569,400 2,020 4.855 $2,764,267
1973 848 630 $534,200 1,895 5.175 $2,764,449
1972 784 630 $494,200 1,753 5.594 $2,764,615
1971 707 630 $445,700 1,581 6.203 $2,764,551
1970 618 630 $389,300 1,381 7.101 $2,764,424
Total 23,919 $110,602,734
Notes:
1 The number of new connections for 2004 2013 is from the Comprehensive Annual Financial Report for the Fiscal Year ended June 30, 2013, page 169. Fees for 2013 and 2014 are from the Master Fee Schedules for those years. 2 Fees for 2012 and earlier are adjusted downward from the 2013 value by the ENR 20City CCI.

The number of new connections for 2003 and earlier are estimated by the City.

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Water and Sewer Rates and Capacity Charges Study

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Appendix G: Sewer Capacity Charge Tables

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Table G1
Valuation of Subsurface Wastewater Collection Pipe
Subsurface Collection Pipe Inventory [1]
Diameter Length Length Percent of Replacement Cost [2] Contributions [3] Assessment District [4]Adjusted Replacement Values (inches) (feet) (miles) System $/LF $ % miles % miles miles $ 4 4,940 0.936 0.3% $310 $1,531,400 100% 0.936 0% 0.000 0.000 $0 6 738,948 139.952 47.7% $310 $229,073,880 100% 139.952 0% 0.000 0.000 $0 8 567,612 107.502 36.6% $310 $175,959,720 65% 69.876 0% 0.000 37.626 $61,585,902 10 64,982 12.307 4.2% $325 $21,119,150 5% 0.615 0% 0.000 11.692 $20,063,193 12 51,779 9.807 3.3% $345 $17,863,755 5% 0.490 0% 0.000 9.316 $16,970,567 14 1,009 0.191 0.1% $240 $242,160 0% 0.000 0% 0.000 0.191 $242,160 15 22,015 4.170 1.4% $250 $5,503,750 0% 0.000 0% 0.000 4.170 $5,503,750 16 1,768 0.335 0.1% $340 $601,120 0% 0.000 0% 0.000 0.335 $601,120 18 36,667 6.945 2.4% $360 $13,200,120 0% 0.000 50% 3.472 3.472 $6,600,060 20 1,273 0.241 0.1% $385 $490,105 0% 0.000 0% 0.000 0.241 $490,105 21 12,974 2.457 0.8% $390 $5,059,860 0% 0.000 0% 0.000 2.457 $5,059,860 24 8,623 1.633 0.6% $410 $3,535,430 0% 0.000 0% 0.000 1.633 $3,535,430 33 31,524 5.970 2.0% $510 $16,077,240 0% 0.000 50% 2.985 2.985 $8,038,620 36 2,887 0.547 0.2% $545 $1,573,415 0% 0.000 0% 0.000 0.547 $1,573,415 42 700 0.133 0.0% $680 $476,000 0% 0.000 100% 0.133 0.000 $0 48 1,186 0.225 0.1% $865 $1,025,890 0% 0.000 100% 0.225 0.000 $0 1,548,887 293.350 100.0% $493,332,995 211.870 6.815 74.665 $130,264,182 72% 2%
Notes:
1 The pipe inventory is from Table 42 of the July 2014 Wastewater Collection System Draft Final Report ( page 43) prepared by RMC. 2 Replacement costs are from Table 45 of the July 2014 Wastewater Collection System Draft Final Report ( page 45) prepared by RMC.

For pipes 12inch diameter and smaller, replacement costs include lower lateral replacement (in the rightofway) and installation of property line cleanouts. Replacement costs include manholes and rodding inlets. 3 The percent contributions were estimated by the City. 4 The percent of pipe funded by Assessment District revenues was provided by Brown and Caldwell.

Table G2
Contribution of Sewer Facility Reserve Fees
ENR 20 City CCI for 2014 = 9806
Escalation
Estimated Facility Reserve Fees and Revenues [1,2] ENR Factor Escalated Number of Index Based on Contribution
Year Fees New Connections Revenues at Year End 9806 CCI Values 2014 2,336 225 $525,500 9,806 1.000 $525,500
2013 2,281 259 $590,700 9,543 1.028 $606,989
2012 2,167 144 $312,000 9,338 1.050 $327,648
2011 1,723 106 $182,600 9,070 1.081 $197,431
2010 1,723 181 $311,900 8,804 1.114 $347,410
2009 1,723 140 $241,200 8,570 1.144 $275,997
2008 1,723 184 $317,000 8,310 1.180 $374,087
2007 1,723 166 $286,000 7,967 1.231 $352,038
2006 1,723 310 $534,100 7,751 1.265 $675,716
2005 1,723 176 $303,200 7,446 1.317 $399,315
2004 501 112 $56,100 7,115 1.378 $77,321
2003 1,003 630 $631,600 6,694 1.465 $925,274
2002 1,003 630 $631,600 6,538 1.500 $947,351
2001 990 630 $623,700 6,342 1.546 $964,414
2000 990 630 $623,700 6,221 1.576 $983,172
1999 973 630 $612,700 6,060 1.618 $991,492
1998 960 630 $604,800 5,920 1.657 $1,001,853
1997 948 630 $596,900 5,825 1.684 $1,004,892
1996 948 630 $596,900 5,620 1.745 $1,041,548
1995 948 630 $596,900 5,471 1.792 $1,069,914
1994 903 630 $568,600 5,408 1.813 $1,031,060
1993 870 630 $548,100 5,210 1.882 $1,031,659
1992 855 630 $538,700 4,985 1.967 $1,059,731
1991 805 630 $507,200 4,835 2.028 $1,028,719
1990 805 630 $507,200 4,732 2.072 $1,051,111
1989 805 630 $507,200 4,615 2.125 $1,077,758
1988 788 630 $496,600 4,519 2.170 $1,077,651
1987 769 630 $484,200 4,406 2.226 $1,077,691
1986 749 630 $472,000 4,295 2.283 $1,077,687
1985 732 630 $461,000 4,195 2.338 $1,077,663
1984 723 630 $455,600 4,146 2.365 $1,077,627
1983 709 630 $446,800 4,066 2.412 $1,077,605
1982 667 630 $420,300 3,825 2.564 $1,077,561
1981 617 630 $388,500 3,535 2.774 $1,077,744
1980 565 630 $355,700 3,237 3.030 $1,077,594
1979 524 630 $330,000 3,003 3.266 $1,077,637
1978 484 630 $305,100 2,776 3.533 $1,077,796
1977 449 630 $283,100 2,576 3.807 $1,077,725
1976 419 630 $263,800 2,401 4.084 $1,077,448
1975 386 630 $243,100 2,212 4.433 $1,077,739
1974 120 630 $75,600 2,020 4.855 $367,015
1973 120 630 $75,600 1,895 5.175 $391,225
1972 120 630 $75,600 1,753 5.594 $422,916
1971 120 630 $75,600 1,581 6.203 $468,925
1970 120 630 $75,600 1,381 7.101 $536,836
Totals 23,423 $36,643,484
Notes:
1 The number of new connections for 2004 2013 is from the Comprehensive Annual Financial Report for the Fiscal Year ended June 30, 2013 , page 169. Fees for 2013 and 2014 are from the Master Fee Schedules for those years.

Fees for 1989 2012 were provided by the City.
2 Fees for 2012 and earlier are adjusted downward from the 2013 value by the ENR 20City CCI.

The number of new connections for 2003 and earlier are estimated by the City.

City of Antioch
2025 Urban Water Management Plan
August 2026

Appendix I

UWMP and WSCP Adoption Resolution

CITY OF ANTIOCH

NOTICE OF PUBLIC HEARING
NOTICE IS HEREBY GIVEN that the City Council of the City of Antioch will hold a public hearing in the CITY COUNCIL CHAMBERS, City Hall, 200 H Street at 7:00 P.M. or thereafter on TUESDAY, AUGUST 25, 2026, on the following matter:

UPDATE TO THE CITY’S 2025 URBAN WATER MANAGEMENT

PLAN AND WATER SHORTAGE CONTINGENCY PLAN
Membe
rs of the public wishing to provide public comments, may do so the following ways:
1 . IN PERSON – Fill out a Speaker Request Form, available near the entrance doors, and place in the Speaker Card Tray near the City Clerk before th e City Cou
ncil Meeting begins.
2 . WRITTEN PUBLIC COMMENT – If you wish to provide a written pub lic comment, please email the City Clerk’s Department at
[email protected] by 3:00 p.m. the day of the City Council Meeting.

Ple
ase note: Written public comments received by 3:00 p.m. the day of the City Council Meeting will be shared with the City Council before the meeting, entered into the public record, retained on file by the City Clerk’s Office, and available to the public upon request. Written public comments will not be read during the City Council Meeting.

I
f any person challenges the decision of the City in these matters in court, they may be limited to raising only those issues that were raised at the public hearing described in this notice , or in written correspondence, delivered to the City at, or prior to, the public hearing.

C
opies of the documents relating to these draft reports are available for public review on the City's website at https://www.antiochca.gov/1122/2025-Urban- Water-Management-Plan-UWMP and at the Public Works Department, 1201 W. 4th Street, Monday through Friday, from 7:00 a.m. to 4:00 p.m. For more information, please call 925-779 -7050 or email [email protected] . If you have any specific questions concerning these documents, you may contact Public Works Director/City Engineer, Scott Buenting at [email protected] .

Written statements in favor of or in opposition to this matter, may be emailed to:
[email protected], or mailed to the City Clerk’s Office, City Hall, 200 "H" Street (P.O. Box 5007), Antioch, CA 94531-5007, prior to the hearing.

ATTACHMENT "C"
2 ACCESSIBILITY: In accordance with the Americans with Disabilities Act and California law, it is the policy of the City of Antioch to offer its public programs, services and meetings in a manner that is readily accessible to everyone, including individuals with disabilities. If you are a person with a disability and require information or materials in an appropriate alternative format; or if you require any other accommodation, please contact the ADA Coordinator at the number or address below at least 72 hours prior to the meeting or when you desire to receive services. Advance notification within this guideline will enable the City to make reasonable arrangements to ensure accessibility. The City’s ADA Coordinator can be reached @ Phone: (925) 779-7009, and e-mail: [email protected].

/s/ MICHAEL MANDY
MICHAEL MANDY, City Clerk

Publication Date: August 5, 2026 and August 12, 2026
cc: Public Works Department
Capital Improvements Division

8 Agenda Item #

STAFF REPORT TO THE CITY COUNCIL

DATE: Regular Meeting of August 25, 2026

TO: Honorable Mayor and Members of the City Council

SUBMITTED BY: Dawn Merchant, Finance Director

APPROVED BY: Ana Cortez, Acting City Manager AEC

SUBJECT: Sales Tax Citizens’ Oversight Committee Appointment for a full-term vacancy expiring March 2030

RECOMMENDED ACTION
It is recommended that the Mayor nominate the candidate for appointment and the City Council adopt a resolution approving the Mayor’s appointment of Dr. Loretta Ezeife to the Sales Tax Citizens’ Oversight Committee for a full-term vacancy expiring March 2030.

FISCAL IMPACT
There is no fiscal impact as all positions are voluntary.

DISCUSSION
The Sales Tax Citizens’ Oversight Committee (Committee) is responsible for reviewing the receipt and expenditure of funds under Measure W as they relate to the Council’s stated priorities outlined in the adopted budgets of the City. The Committee is responsible for reporting out the result of their review by April 1st of each year at a public meeting.

The Committee consists of seven members who are Antioch residents. The terms of the Committee members are staggered with four members serving a 4-year term and 3 members serving a 2-year term. At least one member of the Committee shall have a financial, accounting or auditing background.

In general law cities where the office of mayor is an elective office pursuant to Article 5 (commencing with Section 34900) of Chapter 7 of Part 1 of Division 2 of Title 4, the mayor, with the approval of the city council, shall make all appointments to boards, commissions, and committees, unless otherwise specifically provided by statute. Under Antioch Municipal Code §2-5.201, the Mayor shall nominate candidates for membership on all boards and commissions. Nominees shall be appointed to each board and commission upon receiving approval of at least a majority vote of the City Council.

Currently, there are two full-term vacancies expiring March 2028 and two full-term

Antioch City Council Report
August 25, 2026 Agenda Item #8 2
vacancies expiring March 2030. The City Clerk’s Office advertised to fill the vacancies in the usual manner. The applicant was interviewed by Mayor Ron Bernal and Finance Director Dawn Merchant.

Mayor Bernal is nominating Dr. Loretta Ezeife for Council approval to fill one of the full- term vacancies expiring March 2030.

ATTACHMENTS
A. Resolution appointing Dr. Loretta Ezeife for a full-term vacancy expiring March 2030 B. Application

ATTACHMENT A
RESOLUTION NO. 2026/XX

RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ANTIOCH
APPOINTING DR. LORETTA EZEIFE TO THE SALES TAX CITIZENS’ OVERSIGHT COMMITTEE FOR A FULL-TERM VACANCY EXPIRING MARCH 2030

WHEREAS, there are currently two full-term vacancies expiring March 2028 and two full-term vacancies expiring March 2030 on the Sales Tax Citizens’ Oversight Committee;

WHEREAS, the City Clerk’s Office announced the vacancy and accepted applications for these full-term vacancies;

WHEREAS, Mayor Ron Bernal considered the application received and interviewed the interested applicant;

WHEREAS, Antioch Municipal Code Section 2-5.201 requires the Mayor to nominate candidates for membership on all boards and commissions and requires nominees to receive approval of at least a majority vote of the City Council to be appointed to a board or commission; and

WHEREAS, Mayor Ron Bernal has nominated Dr. Loretta Ezeife to the Sales Tax Citizens’ Oversight Committee, full-term vacancy expiring March 2030.

NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of Antioch hereby approves the Mayor’s appointment of Dr. Loretta Ezeife to serve on the Sales Tax Citizens’ Oversight Committee for a full-term vacancy, expiring March 2030.

* * * * * * * *

I HEREBY CERTIFY that the foregoing resolution was passed and adopted by the City Council of the City of Antioch at a regular meeting thereof, held on the 25th day of August 2026, by the following vote:

AYES:

NOES:

ABSTAIN:

ABSENT:

___________________________________
MICHAEL J. MANDY

CITY CLERK OF THE CITY OF ANTIOCH
Community Service Application for:

SALES TAX CITIZENS’ OVERSIGHT COMMITTEE
*Required field
Five (5) Full-Term Vacancies, expiring March 2030
Deadline Date: By 5:00 p.m., February 27, 2026
APPLICANT INFORMATION Youth 14-17
*Full Name: Main Phone: Alternate Phone:
( )
*Residence Address:

Antioch, CA
E-mail Address:

Employer/School: Occupation: Resident since:
*PARENT/GUARDIAN INFORMATION (If applicant is age 14-17 years) *Full Name: Main Phone:
( )
Alternate Phone:
( )
*Residence Address:

Antioch, CA
E-mail Address:
*QUESTIONNAIRE
Please answer the questions below on a separate sheet(s) and attach. Applications without these questions answered will not be considered. Please attach your resume (recommended to enhance your application).

1. List (3) main reasons for your motivation to join the Sales Tax Citizens’ Oversight Committee.

2. Do you have a financial or accounting background? If so, please provide details.

3. What skills/experience do you have that would be helpful in serving on this Committee?

4. Please add any other information/comments that would be helpful in reviewing your application. *ACKNOWLEDGEMENTS
My signature below indicates my understanding and acknowledgement that:
*This completed application is available for public review (youth applications are exempt). *I have read and agree to the requirements listed on the Vacancy Announcement. *To the best of my ability, I will attend the Sales Tax Citizens’ Oversight Committee regular meetings which meet at least 2 times annually.

Please return completed application by:
• Mail to: Office of the City Clerk
P.O. Box 5007, Antioch CA 94531
• In Person: Antioch City Hall-Clerk’s Office
200 H Street, 3rd Floor
• Email to: [email protected]
___________________________ _________
*Applicant Signature *Date
___________________________ _________
*Parent/Guardian Signature *Date
(An original, signed application with parent/
guardian signature is required, if a minor)

1. My Motivation to Join the Sales Tax Citizens’ Oversight Committee There are three primary reasons I am motivated to serve on the Sales Tax Citizens’ Oversight Committee:

(a) Commitment to Transparent, Accountable Public Stewardship With over 25 years of experience overseeing financial operations across private industry, public agencies, and higher education, I value fiscal transparency and responsible management of public resources. This role aligns with my commitment to ensuring that taxpayer funds are used appropriately and clearly reported.

(b) Passion for Strengthening Community Services
The sales tax measure supports essential city priorities—public safety, emergency response, clean water, safe streets, youth violence prevention, afterschool programs, and park maintenance. I am deeply motivated to support oversight that ensures these services remain funded and effective for all Antioch residents.

(c) Dedication to Clear, Trust‑Building Public Reporting Having led financial reporting functions for more than two decades, including serving as a Chief Financial Officer, I understand how critical accurate communication is for building trust. I want to support a transparent oversight process that helps residents understand how their tax dollars are being used.

2. Financial and Accounting Background
I have over 25 years of professional accounting and budgeting experience across private, public, and higher education sectors. My background includes:
‑ Serving as Chief Financial Officer, responsible for organizational financial stewardship, budgeting, reporting, strategic planning, and internal controls. ‑ Extensive hands‑on experience in accounting operations, financial analysis, audit support, and compliance management.
‑ Leadership roles requiring oversight of complex budgets and ensuring adherence to policy, regulatory requirements, and fiscal best practices.

3. Relevant Skills and Experience for This Committee
‑ Advanced Accounting & Financial Reporting Expertise
‑ Budget Development & Monitoring
‑ Audit & Compliance Leadership
‑ Cross‑Sector Fiscal Insight
‑ Clear Communication and Public‑Friendly Reporting
‑ Integrity and Objectivity

4. Additional Information
Throughout my career, including experience as a Chief Financial Officer and Accounting Officer, I have been responsible for ensuring that financial resources are managed responsibly and that all spending is appropriately documented. I am eager to contribute these skills to the City of Antioch by supporting clear oversight, strengthening public confidence, and ensuring that sales tax funds serve the community’s priorities.

Dr. Loretta Ezeife
| Antioch, CA
Summary
Seeking to serve as Sales Tax Citizens’ Oversight Committee with over 25 years of experience ensuring fiscal stability and compliance. Extensive background in financial planning and audit, including strategic roles at UC Berkeley and Lawrence Berkeley National Laboratory. Proven ability to enhance financial transparency and accountability through engagement and ethical oversight.

Work Experience
University of the Pacific
Accounting Officer | San Francisco, CA | Apr 2025
• Direct business and accounting activities for clinical operations, ensuring adherence to generally accepted accounting principles and regulatory compliance.
• Manage comprehensive financial functions including reporting, accounts payable, accounts receivable, grants and contracts, procurement, and cashiering.
• Establish and implement effective policies, procedures, and internal controls to enhance operational efficiency. • Oversee all grants and contracts, handling contract review, negotiation, approval, and ongoing management, while serving as the primary liaison with external auditors.
• Collaborate with university-wide business and accounting leaders to identify and implement process improvements and enhancements.
• Analyzed accounting trends and data to drive operational process enhancements and informed decision-making.

University of California, Berkeley (Haas School of Business) Chief Financial Officer | Berkeley, CA | 2020 - Feb 2025 • Lead strategic planning for financial sustainability, aligning goals with organizational mission and executive priorities. • Advise senior leadership on financial strategies, assessing impacts of key decisions on operations. • Implement cost-saving measures, achieving $7M in savings and an $8M surplus, strengthening financial health. • Collaborate with program managers and faculty on financial strategies, resource allocation, and hiring decisions. • Develop and gain approval for proposals on tuition adjustments, ensuring a 5% annual increase for specialized programs.

University Development and Alumni Relations
Director of Financial Planning & Analysis | Berkeley, CA | 2019 - 2020 • Manage financial operations including budgeting, forecasting, and financial reporting, ensuring accuracy and compliance with fiscal policies.
• Collaborate with senior leadership to align strategic investments and resource allocation with organizational goals. • Develop and implement financial plans based on strategic planning outcomes, utilizing historical data and future projections.
• Oversee quality improvement initiatives to enhance financial systems, processes, and procedures for operational excellence.
• Design and implement an equity allocation tool to standardize staff compensation, increasing financial transparency and fairness.

Division of Student Affairs Finance
Strategic Finance Manager | Berkeley, CA | 2018 - 2019
• Manage financial analysis team to develop budgets, conduct forecasting, and produce diverse financial reports for executive review.
• Deliver financial planning and analysis support to multiple Student Affairs units, managing a significant portion of the division's operating budget.
• Create advanced financial analyses and reports for executive decision-making, including quarterly reviews and forecast narratives.
• Offer strategic recommendations for process enhancements to the CFO and collaborate with business units on financial decision support.
• Engage with executive leadership to communicate fiscal strategies, develop policies, and contribute to the strategic financial vision.

Recreational Sports
Associate Director Finance | Berkeley, CA | 2014 - 2018 • Direct financial operations, including the formulation and management of a $14 million budget, and oversee the Customer Service Center operations.
• Develop a financial model for a student wellness referendum, delivering a significant revenue stream projected to support the department for three decades.
• Negotiate favorable financing terms for cardio equipment leases and infrastructure upgrades, resulting in annual savings of approximately $50K.
• Conduct annual budgeting, forecasting, variance analysis, and fiscal closing processes, providing comprehensive reports to senior management.

Parking and Transportation/Recreational Sports
Strategy/Financial Analyst IV | Berkeley, CA | 2014 - 2016 • Manage Pay-by-Phone system and software implementations, resulting in $60K annual revenue increase and $75K cost savings.
• Interpret financial data and implement technology systems to enhance recording and analysis processes. • Create and update policies, strategic plans, and comprehensive training programs to improve departmental operations. • Develop financial models, prepare unit budgets and forecasts, and track performance against expectations.

Lawrence Berkeley National Laboratory (Budget Office/Field Operations) Senior Financial/Resource Analyst | Berkeley, CA | 2010 - 2014 • Managed comprehensive budget processes, including forecasting and planning, while providing strategic support to key divisions, ensuring alignment with organizational goals and compliance with financial regulations. • Led institutional reporting for the American Recovery and Reinvestment Act, coordinating across 14 divisions to oversee the financial administration of 130 projects totaling $330 million in funding. • Conducted detailed monthly and quarterly variance analyses, delivering decision support to executive management and program offices, and presented financial findings to senior stakeholders, including CFO and DOE officials.

Pacer Stacktrain
Senior Financial Analyst/Business Analyst | Concord, CA | 2004 - 2010 • Conducted comprehensive financial analyses, including weekly, month-end, trend, and variance assessments to support executive decision-making.
• Generated intricate profit and loss reports, ensuring accurate allocation of revenue, operating expenses, and administrative costs across multiple business units.
• Formulated annual forecasts and budgets for Domestic, International, and Automotive divisions, managing financial planning for entities exceeding $1 Billion in revenue.

Kaiser Permanente
Project Manager II | Oakland, CA | 2003 - 2004
• Managed internal audit findings, facilitating communication and resolution strategies among Internal Audit, Business Owners, and Senior Executives.
• Developed and delivered ad-hoc, monthly, and quarterly reports on internal control weaknesses to the Director, CFO, and Board of Directors.

McKesson Corporation
Senior Financial Analyst/Client Services Specialist | San Francisco, CA | 2001 - 2003 • Served as the primary liaison for business partners, managing forecast, budget, and month-end variance analysis to ensure financial accuracy and accountability.
• Compiled and analyzed financial data across 50+ cost centers, effectively overseeing $50 million in operating expenses and enhancing the precision of monthly financial reporting.

Pacific Gas and Electric
Internal Auditor | San Francisco, CA | 2000 - 2001
• Conducted comprehensive internal audits to ensure the accuracy and reliability of financial reporting for both internal and external stakeholders.
• Evaluated the development and implementation of IT and management information systems, ensuring robust security and operational efficiency.

Barclays Global Investors
Revenue Analyst/Accountant | San Francisco, CA | 1999 - 2000 • Prepared quarterly client invoices for a portfolio of Fortune 500 companies, ensuring accuracy in reflecting over $20 billion in assets under management.
• Processed monthly accruals and executed quarterly reconciliations, effectively addressing and resolving various accounting issues.

Chevron Production Company
Revenue Accountant/Analyst | Concord, CA | 1996 - 1999
• Conducted thorough monthly revenue variance analysis, effectively communicating financial findings to field finance personnel and management.
• Led the initiative to identify and address root causes of royalty payment discrepancies, implementing proactive measures to minimize future errors.

Education
Walden University
DBA, Information Technology | 2017
UC Berkeley
Graduate Certificate, Business Analysis | 2013
Golden Gate University
MBA, Computer Information Systems | 2002
California State University, Hayward
BS, Accounting | 1996
Professional Management Professional
PMP | 2015
Certifications
Professional Management Professional | PMP | 2015
Skills
Financial Analysis, Report Writing, Public Speaking, Community Engagement, Ethics Compliance 9 Agenda Item #

STAFF REPORT

TO THE CITY COUNCIL
DATE: Regular Meeting of August 25, 2026
TO: Honorable Mayor and Members of the City Council
SUBMITTED BY: Michael Mellone, Lieutenant
APPROVED BY: Joe Vigil, Chief of Police
SUBJECT: Adopt a Resolution Authorizing a Sole Source Agreement with Axon Enterprise, Inc. for Automat ed License Plate Recognition, In- Car Camera, and Integrated Public Safety Technology Systems

RECOMMENDED ACTION
It is recommended that the City Council adopt a resolution a sole source agreement with Axon Enterprise, Inc. for 55 fixed automated license plate recognition (ALPR) locations using Axon Outpost, six additional Axon Fleet 3 in-car video and mobile ALPR systems, and 120 Axon AI Assistant licenses for the Police Department, for a 49-month term beginning October 1, 2026, in an amount not to exceed $661,687.54.

FISCAL IMPACT
Axon quote Q-908995-001, issued August 19, 2026, provides a 49-month term from October 1, 2026, through October 31, 2030. T he quote lists a Total Contract Value of $661,687.54, including estimated tax.
 FY 2026-27: $175,403.86 ($135,500.06 due September 1, 2026, and $39,903.80 due June 1, 2027).
 FY 2027-28: $135,500.04, due October 1, 2027.
 FY 2028-29: $175,391.87, due October 1, 2028.
 FY 2029-30: $175,391.77, due October 1, 2029.

Funding for FY 2026-27 has been identified within the existing Police Department General Fund budget; payments in future fiscal years will remain subject to the annual budget process.

DISCUSSION
Background and System Consolidation
ALPR and in-car video are established tec hnolo
gies at the Antioch Police Department
(APD). The Department current ly operates fixed ALPR cameras through Motorola and

Antioch City Council Report
August 25, 2026 Agenda Item# 9 2
Flock. Motorola is decommissioning its AL PR platform, and the proposed purchase would replace and consolidate the two fixed systems into a single Axon network while expanding fixed coverage. The updated quot e stages 38 Axon Outpost locations beginning in 2026 and 17 additional locations in 2027, for 55 fixed ALPR locations under the agreement. The purchase also adds six Fleet 3 systems to support the Department's expanding patrol fleet and 120 Axon AI Assistant licenses.

APD already uses Axon Body 4 cameras, Axon Fleet in-car cameras, and Axon Evidence as its primary digital eviden ce environment. Officers, supervisors, investigators, prosecutor s, and evidence personnel are familiar with the workflow.

Consolidating the fixed ALPR network, added Fleet systems, and AI Assistant within that environment reduces separate accounts, evidence transfers, integrations, audit systems, training burdens, and vendor support relationships.

ALPR Public Safety Value and Evidence
ALPR helps officers and investigators i dentify vehicles associated with shootings, robberies, burglaries, stolen vehicles, hi t-and-run collisions, organized theft, missing persons, illegal sideshows, and other serious incidents. Fixed cameras can alert officers when a vehicle on an authorized hotlist is detected, while authorized historical searches can help develop timelines and investigativ e leads. The six additional Fleet 3 systems will extend mobile ALPR capability to addi tional patrol vehicles. ALPR results are investigative leads and do not replace officer verification, lawful investigative steps, or independent judgment.

Bay Area agencies report measurable ALPR outco mes. Berkeley reported at least 37 stolen-vehicle recoveries, 58 arrests, and support in 121 cases in 2025. South San Francisco reported 108 stolen vehicles recovered and 40 related arrests from 2022 through 2024; stolen-vehicle in cidents fell 19 percent during that period, a decline the City attributed in part to ALPR. Piedmont re ported 33 arrests and 37 recovered vehicles in 2023, and San Francisco repor ted its ALPR system assisted in 207 arrests by April 2025. A 2025 peer-reviewed Atl antic City evaluation also found a major ALPR expansion was associated with reductions in shootings, motor-v ehicle theft, and property crime. These results demonstrate investigative value but do not mean ALPR alone causes broader crime reductions.

ALPR Governance, Privacy, and Accountability
APD already has an ALPR policy in place; this procurement changes the technology platform and expands capacity, but it does not create a new authority to use ALPR.

Policy 422 restricts ALPR use to offici al law enforcement business, prohibits unauthorized use, requires Department-approv ed training, and directs officers, when practicable, to verify an ALPR response through police computer databases before taking enforcement action based solely on an alert (Policy 422.4). The policy also requires safeguarded, login/pas sword-protected access that documents the user, date, and time; limits access to legitimate law en forcement purposes; and calls for regular audits (Policy 422.6). Outside la w enforcement requests must be in writing, identify the requesting agency and person, state the intended purpose, be approved before release, Antioch City Council Report
August 25, 2026 Agenda Item# 9 3
and be retained on file (Policy 422.7). APD's current operating rules add a further requirement that historical s earches be tied to a specific police case or CAD event and include a specific investigat ive reason. APD does not share or provide access to ALPR data with federal or out-of-st ate agencies in accordance wit h the California Values Act (SB 54).

These controls will carry forward to the Axon platform. Under Axon's governance model, the City retains control of its ALPR data, shar ing is not automatic, and access is logged and auditable. APD will not provide direct or standing ALPR access to federal or out-of- state law enforcement agencie s. Any authorized request fr om another California law enforcement agency must have a lawful inve stigative purpose and remain subject to APD approval, policy, logging, and audit. The system does not use facial recognition or make enforcement decisions.

In-Car Video Expansion
APD already uses Axon Fleet in-car cameras in patrol vehicles. The six Fleet 3 systems included in this agreement will be installed in additional patrol vehicles as the Department's fleet expands. They will extend in-car video and mob ile ALPR coverage while keeping vehicle evidence within the same Axon Evidence environment used today for chain of custody, permissions, auditing, legal holds, and disclosure. No separate in- car video platform or evidence workflow is being introduced.

Axon AI Assistant and Language Access
Axon AI Assistant licenses adds an audible l anguage translation feature to the Body 4 camera already worn by officers in t he field. This provi des language translation assistance in more than 50 languages, including Spanish, Tagalog, Vietnamese, Arabic, Mandarin Chinese, Hindi, and Persian, all within language gr oups identified in APD's Language Access Plan. The featur e is manually activated and uses a push-to-talk workflow; it is not passively or continuously listening. When translation is activated, the interaction is recorded through the body-wor n-camera system and use is auditable in Axon Evidence. This gives officers an i mmediate communication tool during traffic stops, calls for service, public-assistance contacts, and initial investigations and supports APD's obligations under the Department of Justice Memorandum of Agreement and the Department's Language Access Plan to provide timely and meaningful language access.

The Assistant supplements, rath er than replaces, bilingual officers and qualified human interpreters. Personnel will receive training on appropriate use, limitations, verification, and supervisory oversight before deployment.

SOLE SOURCE JUSTIFICATION
Staff recommends sole source procurement to standardize on the Axon platform APD already uses for body-worn cameras, in-car video, and Evidence.com. One environment provides common accounts and permissions, familiar evidence handling and chain of custody, coordinated auditing, a common tr aining framework, and single-vendor Antioch City Council Report
August 25, 2026 Agenda Item# 9 4
support. Procuring separate fixed ALPR, in-car video, and field-assistant systems would recreate the fragmented accounts, integrations, evidence transfers, security reviews, training, and support relationships this projec t is intended to reduce. Other vendors sell standalone products, but the City's operationa l requirement is an integrated design compatible with Axon systems already deployed by APD.

Antioch Municipal Code secti on 3-4.12(B) permits sole source purchasing for unique, proprietary, or specific-design goods and se rvices, including hardware, software, and communications equipment.

ATTACHMENTS
A. Resolution
B. Axon Quote Q-908995-001
C. Axon Vehicle Intelligence Governance and Technology Materials D. Axon AI Assistant and Real-Time Translation Materials RESOLUTION NO. 20
26/XX

RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ANTIOCH AUTHORIZING A SOLE SOURCE AGREEMENT WITH AXON ENTERPRISE, INC. FOR

AUTOMATED LICENSE PLATE RECOGNITION , IN-CAR VIDEO, AND

INTEGRATED PUBLIC SAFETY TECHNOLOGY SYSTEMS NOT TO EXCEED $661,687.54
WHEREAS, the Police Department currently operates Motorola and Flock ALPR systems, and Motorola is decommissioning its platform, requiring replacement and consolidation of the City's fixed ALPR systems; and
WHEREAS, the Police Department already uses Axon Fleet in-car cameras, Axon Body 4 cameras, and Evidence platforms, and the proposed purchase includes 55 fixed Axon Outpost ALPR locations, staged as 38 beginning in 2026 and 17 additional locations in 2027, six additional Axon Fleet 3 in-car video and mobile ALPR systems for additional patrol vehicles as the Department's fleet expands, and 120 Axon AI Assistant licenses; and
WHEREAS, APD's existing Policy 422 governs ALPR use and restricts it to official law enforcement purposes, requires Department-approved training, safeguards and logs access, limits stored-data access to legitimate law enforcement purposes, calls for regular audits, does not share data with federal or out-of-state agencies, complies with the California Values Act (SB 54) and requi res review and approval of outside law enforcement requests; and
WHEREAS, Axon AI Assistant provides real -time translation via the Body 4 camera currently used by officers in more than 50 languages, supporting field operations and APD's language-access responsibilities; and
WHEREAS, standardizing the replacement and expanded fixed ALPR network, additional Fleet systems, and AI Assistant within APD's existing Axon environment provides common training, evidence handling, permissions, auditing, and vendor support and supports sole source procurement under Antioch Municipal Code section 3-4.12(B); NOW, THEREFORE, BE IT RESOLVED that the City Counc il hereby authorizes the Acting City Manager, or designee, to exec ute a sole source agreement with Axon Enterprise, Inc., in a form approved by the City Attorney, for the technology described above for a 49-month term not to exceed $661,687.54.
* * * * * * * I HEREBY CERTIFY that the foregoing resolution was passed and adopted by the City Council of the City of Anti och at a regular meeting ther eof, held on the 25th day of August 2026, by the following vote:

ATTACHMENT A
AYES:

NOES:

ABST
AINED:

ABSENT:
__________________________________
MICHAEL J. MANDY

CITY CLERK OF THE CITY OF ANTIOCH
Axon Enterprise, Inc.
17800 N 85th St, Scottsdale, Arizona 85255, United States VA T: 86-0741227
Domestic: (800) 978-2737 | International: +1 800.978.2737 Q-908995-001 Acct: 147404
Issued Aug 19, 2026
Expires Aug 31, 2026
Payment T erms N30
Mode of Delivery AUTO-GND
Antioch Police Department - CA Currency: USD

CUSTOMER DETAILS

SHIP TO
Antioch Police Department - CA
300 L ST

ANTIOCH, CA
94509-1159
USA

BILL TO
Antioch Police Department - CA
300 L ST

ANTIOCH, CA
94509-1159
USA

SALES REPRESENTATIVE
Tierney Stuhr
Phone: (480) 712-4910
Email: [email protected]

PRIMARY CONTACT
William William Whitaker
Phone: (925) 354-8981
Email: [email protected]

QUOTE SUMMARY
Program Length 49 Months
Contract Start Oct 1, 2026
Contract End Oct 31, 2030

TOTAL CONTRACT
Net T otal $645,529.50
Est. T ax $16,157.80
T otal Contract V alue $661,687.30

PA YMENT SUMMARY
DATE SUBTOTAL EST. TAX TOTAL
Sep 1, 2026 $132,453.38 $3,046.68 $135,500.06
Jun 1, 2027 $38,579.80 $1,324.00 $39,903.80
Oct 1, 2027 $132,453.36 $3,046.68 $135,500.04
Oct 1, 2028 $171,021.60 $4,370.27 $175,391.87
Oct 1, 2029 $171,021.60 $4,370.17 $175,391.77
T otal $645,529.74 $16,157.80 $661,687.54
Axon Enterprise, Inc. Doc ID: 36476a9332e2 T ax estimates are approximate and subject to change at time of invoicing.

Q-908995-001 • Page 1 of 6

ATTACHMENT B
Antioch Police Department - CA Q-908995-001 Generated Aug 19, 2026

SUMMARY PRICING FOR TERM

SUMMARY PRICING

ITEM DESCRIPTION QTY TERM UN-

BUNDLED
LIST PRICE NET PRICE SUBTOTAL EST. TAX TOTAL
80462
T rue Up - Fleet 3 Advanced with T AP 6 9
(2/2030) — $108.00 $108.00 $5,832.00 $568.62 $6,400.62
103070
Outpost T AP Bundle T rue-Up 33 11
(10/2026) — $100.83 $73.56 $26,701.29 $2,603.39 $29,304.68 102182
Outpost Bundle T rue-Up 17 20
(3/2029) — $68.49 $0.00 $0.00 $0.00 $0.00
102011
Axon AI Assistant 120 49
(10/2026) — $31.93 $29.27 $172,118.40 $0.00 $172,118.40 F00011
Bundle - Fleet Cradlepoint R920 Single Modem Kit 6 49
(10/2026) — $1,464.00 $214.00 $1,284.00 $125.18 $1,409.18 Fleet3A
Fleet 3 Advanced 6 49
(10/2026) $304.95 $304.95 $221.96 $65,256.24 $1,937.01 $67,193.25 80402
Axon Fleet - Real-Time Location, Alerts & Livestream License 49 9 (2/2030) — $15.00 $0.00 $0.00 $0.00 $0.00
B00076
Outpost T AP Plan 33 49
(10/2026) $395.30 $395.32 $135.45 $219,021.29 $6,952.43 $225,973.72 102703
Axon Outpost - Warranty - V andalism/Accident Extension 33 38 (9/2027) — $1,200.00 $1,200.00 $39,600.00 $0.00 $39,600.00 B00075
Outpost Plan 5 49
(10/2026) $322.81 $322.80 $0.00 $0.00 $0.00 $0.00
B00076
Outpost T AP Plan 17 40
(7/2027) $428.03 $428.01 $140.17 $95,316.28 $3,971.17 $99,287.45 102703
Axon Outpost - Warranty - V andalism/Accident Extension 17 29 (6/2028) — $1,200.00 $1,200.00 $20,400.00 $0.00 $20,400.00 SUBTOTAL EST. TAX TOTAL
T otal $645,529.50 $16,157.80 $661,687.30
Axon Enterprise, Inc. Doc ID: 36476a9332e2 T ax estimates are approximate and subject to change at time of invoicing.

Q-908995-001 • Page 2 of 6
Antioch Police Department - CA Q-908995-001 Generated Aug 19, 2026

DELIVERY SCHEDULE
ESTIMATED SHIPPING DATE: Sep 1, 2026
Shipping Location: 300 L ST, ANTIOCH, CA, 94509-1159, USA

HARDWARE QTY
Axon Fleet - Cradlepoint R920-C7A+5Yr Netcloud 6
Axon Fleet 3 - Standard 2 Camera Kit 6
Axon Outpost - Battery & Charger Enclosure - Extended 38 Axon Outpost - Camera 39
Axon Outpost - Pole - Standard 38
Axon Outpost - Solar Panel - 100W 38
Axon Outpost - Standard Solar Hardware Kit 38
Axon Outpost - T op Mount End Cap - Standard 38
Axon Signal V ehicle 6

SERVICES QTY
Axon Fleet 3 - Deployment Per V ehicle - Not Oversized 6 Axon Fleet 3 - SIM Insertion - VZW 4FF 6
Axon Outpost - Standard Installation 38
Axon Outpost - Upgrade Installation 33

WARRANTIES QTY
Axon Fleet 3 - Ext Warranty - 2 Camera Kit 6
Axon Outpost - Ext Warranty - Camera 39
Axon Outpost - Maintenance 38
Axon Outpost - Warranty - V andalism/Accident Extension 33 Axon Signal - Ext Warranty - Signal V ehicle 6
ESTIMATED SHIPPING DATE: Oct 1, 2026
Shipping Location: 300 L ST, ANTIOCH, CA, 94509-1159, USA

SOFTWARE QTY
Axon AI Assistant 120
Axon Evidence - Fleet V ehicle License 6
Axon Evidence - Storage - Fleet 1 Camera Unlimited 12
Axon Fleet - Real-Time Location, Alerts & Livestream License 6 Axon Fleet 3 - ALPR License - 1 Camera 6
Axon V ehicle Intelligence - ALPR License 38
ESTIMATED SHIPPING DATE: Jun 1, 2027
Shipping Location: 300 L ST, ANTIOCH, CA, 94509-1159, USA

HARDWARE QTY
Axon Outpost - Battery & Charger Enclosure - Extended 17 Axon Outpost - Camera 17
Axon Outpost - Pole - Standard 17
Axon Outpost - Solar Panel - 100W 17
Axon Outpost - Standard Solar Hardware Kit 17
Axon Enterprise, Inc. Doc ID: 36476a9332e2 T ax estimates are approximate and subject to change at time of invoicing.

Q-908995-001 • Page 3 of 6
Antioch Police Department - CA Q-908995-001 Generated Aug 19, 2026 Axon Outpost - T op Mount End Cap - Standard 17

SERVICES QTY
Axon Outpost - Standard Installation 17
Axon Outpost - Upgrade Installation 17

WARRANTIES QTY
Axon Outpost - Ext Warranty - Camera 17
Axon Outpost - Maintenance 17
Axon Outpost - Warranty - V andalism/Accident Extension 17 ESTIMATED SHIPPING DATE: Jul 1, 2027
Shipping Location: 300 L ST, ANTIOCH, CA, 94509-1159, USA

SOFTWARE QTY
Axon V ehicle Intelligence - ALPR License 17
ESTIMATED SHIPPING DATE: Feb 1, 2030
Shipping Location: 300 L ST, ANTIOCH, CA, 94509-1159, USA

SOFTWARE QTY
Axon Fleet - Real-Time Location, Alerts & Livestream License 49 ESTIMATED SHIPPING DATE: Oct 1, 2030
Shipping Location: 300 L ST, ANTIOCH, CA, 94509-1159, USA

HARDWARE QTY
Axon Fleet - T AP Refresh 1 - 2 Camera Kit 6
Axon Outpost - T AP Refresh One - Battery Enclosure Extended 50 Axon Outpost - T AP Refresh One - Camera 51
Axon Enterprise, Inc. Doc ID: 36476a9332e2 T ax estimates are approximate and subject to change at time of invoicing.

Q-908995-001 • Page 4 of 6
Antioch Police Department - CA Q-908995-001 Generated Aug 19, 2026

TERMS & CONDITIONS
T ax is estimated based on rates applicable at date of quote and subject to change at time of invoicing. If a tax exemption certificate should be applied, please submit prior to invoicing.

STANDARD TERMS AND CONDITIONS
Axon Master Services and Purchasing Agreement:

This Quote is limited to and conditional upon your acceptance of the provisions set forth herein and Axon’s Master Services and Purchasing Agreement (posted at https:// www.axon.com/sales-terms-and-conditions), as well as the attached Statement of Work (SOW) for Axon Fleet and/or Axon Interview Room purchase, if applicable. In the event you and Axon have entered into a prior agreement to govern all future purchases, that agreement shall govern to the extent it includes the products and services being purchased and does not conflict with the Axon Customer Experience Improvement Program Appendix as described below.

Cradlepoint T erms and Conditions:

By accepting this Quote including Cradlepoint products, Customer designates and authorizes Axon as its partner of record for purposes of Cradlepoint product renewals, support coordination, and other relevant functions. This designation applies to all Cradlepoint products acquired by Customer during the Subscription T erm of this Quote whether directly from Cradlepoint, through Axon, or through any third-party vendor or distributor. Axon shall have no liability to Customer or any third party arising out of or relating to Axon’s acts or omissions as the partner of record. Customer has the right to opt out of this authorization at any time by providing prior written notification to both Axon and Cradlepoint. Upon such notification, the designation will be removed. This authorization remains effective until formally removed in accordance with this section or as otherwise agreed between the parties in the Agreement.

ACEIP:

The Axon Customer Experience Improvement Program Appendix, which includes the sharing of de-identified segments of Agency Content with Axon to develop new products and improve your product experience (posted at www.axon.com/legal/sales-terms-and-conditions), is incorporated herein by reference. By signing below, you agree to the terms of the Axon Customer Experience Improvement Program.

Acceptance of T erms:

Any purchase order issued in response to this Quote is subject solely to the above referenced terms and conditions. By signing below, you represent that you are lawfully able to enter into contracts. If you are signing on behalf of an entity (including but not limited to the company, municipality, or government agency for whom you work), you represent to Axon that you have legal authority to bind that entity. If you do not have this authority, please do not sign this Quote.

EXCEPTIONS TO STANDARD TERMS AND CONDITIONS
Rewrite Estimates
Estimated Amounts and Contract T erminations. Any amounts stated as due under existing or terminated contracts — including contract transfer balances carried forward to new or pending contracts — are estimates based on payments received as of the calculation date. These estimates may be adjusted if new contracts are not executed on the anticipated dates or if expected payments are not made.

Refresh Shipment Timing
T echnology Assurance Plan (TAP) Refresh Prior to Renewal. For Customers with expiring agreements that include T AP refresh rights, Axon may, in its discretion, ship refresh hardware under the existing contract while renewal or replacement agreements are in progress. Any such shipments will be deemed made under the terms of the existing contract until the new contract is fully executed, after which any applicable updates, fees, or adjustments will apply.

Shipment Timing
Shipment V ariance . Estimated shipment dates are provided for planning purposes only and are not guarantees. Axon may ship hardware before or after the estimated shipment date, and failure to meet an estimated shipment date will not, by itself, constitute a breach, provided Axon uses commercially reasonable efforts to meet estimated shipment dates.

OUTPOST SOW

1. Purpose
This Statement of Work ("SOW") outlines the scope, responsibilities, and installation details for Axon as part of the Customer's purchase of Axon Outpost. This SOW operates under the terms of the Agreement. All capitalized terms in this SOW shall have the same meaning as the Agreement.

2. Scope of Work
Axon and Axon authorized subcontractors will install and maintain Axon Outpost on selected Customer owned properties.

3. Installation Location
Customer grants Axon the right to install and maintain Axon Outpost at location sites approved by Axon.

3.1. If location sites have not been selected or assessed at the time of contract signature, Axon reserves the right to invoice the Customer for additional install complexities not accounted for in the initial quote.

4. Installation, V alidation, and Support

4.1. Site Selection and Assessment. Axon will support site selection and assessment. Assessments may be conducted virtually or in-person and may include confirmation of visibility/ coverage, cellular strength, solar feasibility, and access to AC power sources.

4.1.1. For all existing infrastructure installation sites, Customer is responsible for condition of existing infrastructure.

4.1.2. If during a site walk it has been deemed that an installation is more complex than initially quoted, Axon reserves the right to invoice Customer for the additional cost of installation.

4.1.3. If Axon deems a selected location site is not suitable for installation, a new site must be selected and assessed.

4.2. Permitting. Axon will assist with obtaining the necessary local, state, or Federal approvals before installing Outpost. All permitting fees are the responsibility of the customer. All permit licenses will be in the name of the customer.

4.3. Installation. Axon will install all Axon Outpost hardware and agreed-upon pole (where applicable).

4.3.1. Solar Sites. For sites with solar power, Axon will: (a) install the Outpost camera, battery, and solar panel; (b) ensure the camera is connected to power and LTE; (c) ensure the camera is set at the optimal capture angle; (d) ensure the panel is installed for optimal sun exposure.

4.3.2. AC Sites. For sites with AC power, Axon will: (a) install the Outpost camera and AC adapter; (b) ensure the camera is set at the optimal capture angle. Axon will not conduct any electrical work to connect the AC adapter to power. The customer may work with a licensed electrician to connect the camera to power. Or, If requested, the customer may request for Axon to coordinate with a licensed electrician for an additional cost.

Axon Enterprise, Inc. Doc ID: 36476a9332e2 T ax estimates are approximate and subject to change at time of invoicing.

Q-908995-001 • Page 5 of 6
Antioch Police Department - CA Q-908995-001 Generated Aug 19, 2026

4.3.3. Existing Infrastructure Installations. If selected infrastructure has existing camera(s), Axon will remove the hardware before installing Outpost. Axon will not dispose of equipment, repair any surfaces or structures, or remove underground cables or conduit.

4.3.4. Standard and Advanced Installations. For Standard or Advanced installations, Axon will install a breakaway or MASH approved pole, respectively. Axon will call 811 prior to installation.

4.3.5. DOT Pole Installation Service. Axon will install Outpost on existing DOT poles and ensure compliance with DOT guidelines. Axon will not install DOT poles.

4.3.6. Complex Location Sites. Complex location sites require a custom SOW and include, but are not limited to, toll booths, bridges and overpasses, federal or military land, areas with restricted access or high security, flood zones, railway crossing, mountainous or hilly terrain.

4.3.7. Exclusions. Installation services do not include the following, unless specifically scoped in a custom SOW: electrical work, concrete drilling, bucket truck or non-standard equipment rental, trenching, tree trimming, custom engineered drawings or traffic plans, traffic control beyond basic MUTCD traffic control, environmental impact studies.

5. Power Requirements

5.1. AC-Powered Sites. Axon will provide all necessary equipment compatible with standard AC power configurations. Customer is responsible for contracting a licensed electrician to ensure installation meets NEC (National Electrical Code) standards and the power must be continuous and non-switched to support uninterrupted system operation; all electrical work must comply with local codes and safety regulations.

5.2. Solar-Powered Sites. Installation sites must offer unobstructed southern exposure to maximize solar efficiency. Axon will assess solar viability during site assessment, including shading, positioning, and mounting considerations. Customer will ensure the selected location sites must maintain direct, unobstructed visibility to the sky to ensure consistent solar energy capture. Customer agrees to help maintain environmental conditions that support reliable solar performance (e.g., minimizing nearby shade, vegetation growth).

6. T raffic Control
Axon will provide basic MUTCD traffic control and provide necessary traffic signs, cones, and temporary barriers.

7. Dependencies and Potential Delays
Installation is subject to but not limited by the following factors, which may affect scheduling and completion: delays due to local permitting requirements or jurisdictional approvals; availability and completion of necessary electrical work at the installation site (for AC-powered setups); coordination with Customer and subcontractors, including restricted hours or special access requirements; weather-related delays that may impact site safety or installation feasibility; or any site-specific safety protocols or regulatory requirements that must be satisfied prior to deployment.

Antioch City CouncilAugust 25, 2026

Antioch City Council
August 25, 2026