Corona City Council
June 17, 2026

City of Corona
Potable Water Master Plan

LIST OF APPENDICES
Appendix A – Blending Program Technical Report/Opera ons Plan Appendix B – Western Municipal Water District (WMWD) Resolution No. 3166 Appendix C – Well Pump Efficiency Tests (SCE)
Appendix D – Corona’s Water Production Data
Appendix E – Water Audits
Appendix F – Site Visit Conditional Assessment
Appendix G – City of Corona’s Inventory
Appendix H – Deficient Pipelines within Areas of Concern Appendix I – Existing Model Calibration Curves
Appendix J – Planned Near-Term Developments
Appendix K – Hydraulically Deficient Pipe Project Cut Sheets Appendix L – Size Deficient Pipes and Pipelines Beyond Typical Service Life Appendix M – Undersized Dead-End Mains (Non-Deficient)

Appendix A
Blending Program Technical
Report/Operations Plan

 










 





 

 
 




 







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Appendix B
Western Municipal Water District
(WMWD) Resolution No. 3166

RESOLUTION 3166

RESOLUTION OF THE BOARD OF DIRECTORS

OF WESTERN MUNICIPAL WATER DISTRICT

OF RIVERSIDE COUNTY DETERMINING WATER

RATES AND CHARGES FOR WATER USER AGENCIES
WHEREAS, the Metropolitan Water District of Southern
California (MWD) at the April 14, 2020, Board of Directors meeting adopted water rates to be effective January 1, 2022, as follows:

Tier 1 Supply Rate $243 per acre foot
Tier 2 Supply Rate $285 per acre foot
System Access Rate $389 per acre foot
Water Stewardship Rate $ 0 per acre foot
System Power Rate $167 per acre foot
Treatment Surcharge $344 per acre foot
Capacity Charge $12,200 per cfs
Readiness-to-Serve Charge $140 million
Note: the Readiness-to-Serve Charge is allocated based on each member agency’s ten-year rolling average of firm water demands.

Standby Charge revenues will continue to be credited against each MWD member agency’s Readiness-to-Serve Charge.

Based on the rates above, the MWD Full Service Untreated Tier 1 and Tier 2 rates are $799 and $841 per acre foot, respectively, and the MWD Full Service Treated Tier 1 and Tier 2 rates are $1,143 and $1,185 per acre foot, respectively, and;
WHEREAS, the Western Municipal Water District (Western) Board of Directors at a special Board meeting on October 9, 2002, after receiving input and comments from a majority of Western’s retail agency customers, adopted a method of passing through MWD charges to user agencies, and;
Attachment 4
R-3166 - 2 -
WHEREAS, the Western Board of Directors at a regular
Board meeting on December 3, 2014, authorized a ten-year purchase order with MWD, resulting in an Initial Base Period Demand of 117,537 acre feet for Western, and consequently a Tier 1 Annual Maximum of 105,783 acre feet beginning with calendar year 2015; NOW, THEREFORE, BE IT RESOLVED by the Board of Directors of Western that, effective July 1, 2021, a charge of $24.06 per acre foot is hereby added to the cost of water charged by MWD to all of the retail agencies to whom water is made available by Western. Such charge will be used by Western in the administration of the supply and delivery of water to retail agencies; BE IT FURTHER RESOLVED that, effective July 1, 2021, a
charge of $16.26 per acre foot is hereby added to the cost of treated water delivered from the Mills Gravity Line to all retail agencies to whom water is made available by Western. Such charge will be used by Western to recover the cost of day-to-day maintenance of the Mills Gravity Line.

BE IT FURTHER RESOLVED that all water delivered from MWD to retail agencies of Western shall be in accordance with the Administrative Code and the rules, regulations and policies of MWD and Western. The charges for such water deliveries shall be as follows:
- 3 - R-3166
(a.) For all MWD water that is not delivered through the Mills Gravity Line.

Rates for Full Service Water Deliveries, Per Acre Foot, effective January 1, 2022:

Tier 1 Tier 2
Untreated Water Deliveries $799.00 $841.00
Western Administrative Charge 24.06 24.06
Total for Untreated Water Deliveries $823.06 $865.06
Tier 1 Tier 2
Treated Water Deliveries $1,143.00 $1,185.00
Western Administrative Charge 24.06 24.06
Total for Treated Water Deliveries $1,167.06 $1,209.06
(b.) For all MWD water that is delivered through the Mills Gravity Line.

Rates for Full Service Water Deliveries, Per Acre Foot, effective January 1, 2022:

Tier 1 Tier 2
Untreated Water Deliveries $799.00 $841.00
Western Administrative Charge 24.06 24.06
Mills Gravity Line Maint. Charge 16.26 16.26
Total for Untreated Water Deliveries $839.32 $881.32
Treated Water Deliveries $1,143.00 $1,185.00
Western Administrative Charge 24.06 24.06
Mills Gravity Line Maint. Charge 16.26 16.26
Total for Treated Water Deliveries $1,183.32 $1,225.32
R-3166 - 4 -
BE IT FURTHER RESOLVED that the maximum quantity of MWD full service water to be delivered at Tier 1 rates (Tier 1 Annual Maximum) to each retail agency for Calendar Year 2022 is:

Retail Agency CY 2022 AF
City of Corona 21,110.0
City of Norco 1,223.0
Metropolitan Water District 3.5
Elsinore Valley MWD 21,037.1
Temescal Valley Water District 3,458.5
City of Riverside 1,912.9
Rancho California Water District 27,312.1
Eagle Valley Mutual Water Company 948.2
Western Retail 28,777.7
Total Acre Feet 105,783.0
The allocation of the Tier 1 Annual Maximum above is set at 90% of each retail agency’s total MWD deliveries during Fiscal Year 2006-2007, utilizing the same method used by MWD to set Western’s Tier 1 Annual Maximum.

All quantities of MWD full service water delivered to a retail agency in excess of their Tier 1 Annual Maximum listed above will be charged at the Tier 2 rate. The exception to this is (a) MWD has not assessed Western any Tier 2 charges for the year, or (b) there are agencies listed above that do not use their full Tier 1 Annual Maximum during the calendar year (unused Tier 1). In this latter case, the unused Tier 1 will be allocated to each agency that exceeded their Tier 1 Annual Maximum during the calendar year based on the proportion of their excess to the total of all agencies’ excess (unused Tier 1 allocation). After the allocation of unused Tier 1, if available, any full service water delivered to a retail agency in excess of their Tier 1 Annual Maximum plus their unused Tier 1 allocation will be charged at the Tier 2 rate. This is the method used in prior years.
- 5 - R-3166
BE IT FURTHER RESOLVED that each retail agency will pay the MWD Capacity Charge based on the capacity used on Western’s maximum summer day demand placed on the MWD system between May 1 and September 30 for the three-calendar-year period ending December 31, 2020, which was September 12, 2018. The peak demands used for Calendar Year 2021’s calculations are:

Elsinore Valley Municipal Water District 70.8 cfs
City of Corona 40.6 cfs
Rancho California Water District 42.9 cfs
City of Norco 0.0 cfs
Temescal Valley Water District 5.0 cfs
City of Riverside 0.0 cfs
Eagle Valley Mutual Water Company 0.0 cfs
Metropolitan Water District 0.0 cfs
Western Retail _35.4 cfs
Total 194.7 cfs
BE IT FURTHER RESOLVED that effective January 1, 2022,
Western’s Capacity Charge rate shall be the MWD rate of $12,200 per cfs. Each retail agency will be billed each calendar month an amount equal to the capacity used on the peak demand day multiplied by the Western Capacity Charge rate and divided by twelve as follows:

Monthly Amount
Elsinore Valley Municipal Water District $ 71,980.00
City of Corona $ 41,276.67
Rancho California Water District $ 43,615.00
City of Norco $ 0.00
Temescal Valley Water District $ 5,083.33
City of Riverside $ 0.00
Eagle Valley Mutual Water Company $ 0.00
Metropolitan Water District $ 0.00
Western Retail _$ 35,990.00
Total $197,945.00
R-3166 - 6 -
BE IT FURTHER RESOLVED that effective July 1, 2021, each agency will be billed each calendar month an amount equal to their share of the MWD net Readiness-to-Serve Charge (RTS Charge). The monthly amounts for July through December 2021 and January through June 2022 are as follows:

Monthly Amount Monthly Amount
July – Dec 2021 Jan – June 2022
City of Corona $ 51,933.83 $ 65,113.67
City of Norco $ 0.00 $ 0.00
Metropolitan WD $ 19.50 $ 22.50
Elsinore Valley MWD $ 46,183.50 $ 58,392.83
Temescal Valley WD $ 9,802.50 $ 12,468.50
City of Riverside $ 0.00 $ 0.00
Rancho California WD $ 59,332.50 $ 78,337.50
Eagle Valley MWC $ 0.00 $ 41.00
Western Retail $ 51,769.50 $ 60,016.67
Total $ 219,041.33 $ 274,392.67
The RTS Charge assessed to Western by MWD is allocated to each retail agency and to Western’s retail customers based on the same method MWD uses to assess it, the ten-year rolling average of firm deliveries (for calendar year 2022’s allocation, the ten fiscal years are 2010-2011 through 2019-2020). The Standby Charge placed on the County tax rolls by MWD applicable to the parcels within the boundaries of each agency’s service area (less an MWD
administrative charge and estimated delinquencies) is used as an offset to each agency’s share of the RTS Charge, resulting in an Adjusted RTS Charge / Credit.

For some agencies, netting their RTS Charge with their Standby Charge revenue results in a credit instead of a charge. The sum of credits from these agencies is then allocated to the remaining agencies that have a charge. The allocation of the credits is - 7 - R-3166
based on the proportion of each agency’s Adjusted RTS Charge to the total Adjusted RTS Charge. The result is a net RTS Charge.

BE IT FURTHER RESOLVED that effective July 1, 2021, each agency will be billed annually to fund a Mills Gravity Line Fixed Major Maintenance and Repair Reserve (Maintenance Reserve). The total amount to be funded will be allocated to each agency based on their proportion of service rights owned in the Mills Gravity Line as follows:

The Maintenance Reserve was established to fund inspections of the Mills Gravity Line and to fund major maintenance and repair work necessary to keep the pipeline in good working condition. The Maintenance Reserve budget amount was established by HDR, a thirdparty engineering consultant, who completed a condition assessment of the Mills Gravity Line. Western plans to annually fund the Maintenance Reserve based on the next 10 years of HDR’s budget, totaling $11,620,116.

Total
Service
Rights
Percent
Ownership
10 Years
Maintenance
Reserve
Purchase
Option
Maintenance
Reserve
Annual
Funding
City of Corona 61.50 10.89% $ 1,265,068 $ 126,507
Temescal Valley
Water District

87.96 15.57% $ 1,809,356 $ 180,936
City of Riverside 30.00 5.31% $ 617,107 $ 61,711
Metropolitan Water
District

17.50 3.10% $359,979 $ 35,998
Elsinore Valley
Municipal Water
District

54.00 9.56% $1,110,792 $37,027
Western Retail 313.94 55.57% $ 6,457,814 $(37,027) $ 756,860 Total 564.90 100.00% $ 11,620,116 $0 $ 1,162,012
R-3166 - 8 -
BE IT FURTHER RESOLVED that invoices for rates and
charges shall be issued by the 15th of the month following the month for which service was provided, and invoices which are not paid before the next billing cycle (30 days) shall be subject to interest charges. Interest will be calculated at a rate of one percent (1%) per month on all amounts that remain unpaid at each billing cycle. The minimum amount of an invoice will be twentyfive dollars ($25.00) per water connection, with the minimum amount charged even if there are no water deliveries.

BE IT FURTHER RESOLVED that this resolution will be
effective upon adoption, with the effective dates of various rates and charges described herein, and shall supersede Resolution 3116 of the Board of Directors of Western.

ADOPTED this 16th day of June, 2021
_______________________

BRENDA DENNSTEDT
President
June 16, 2021
I HEREBY CERTIFY that the foregoing is a full, true and correct copy of Resolution 3166 adopted by the Board of Directors of Western Municipal Water District of Riverside County at its Regular Meeting held June 16, 2021.
________________________

MIKE GARDNER
Secretary-Treasurer

Appendix C
Well Pump Efficiency Tests (SCE)

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #7A
Location: 917 6 CIRCLE CITY DR CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 36388
Equipment
HP: 150
Pump: FLOWS No:

Motor: US No:

Results
Discharge Pressure, PSI 104.6 104.4 102.6
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 241.6 241.2 237.0
Pumping Water Level, Feet 170.7 161.3 152.2
Total Head, Feet 412.3 402.5 389.2
Capacity, GPM 1,204 966 741
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 5.322 4.270 3.275
kW Input to Motor 140.3 104.3 75.6
HP Input to Motor 188.1 139.9 101.4
Motor Load (%) 115.9 86.2 62.4
Measured Speed of Pump, RPM
Customer Meter, GPM 1,180 954 735
kWH per Acre Foot 633 586 554
Overall Plant Efficiency (%) 66.6 70.2 71.8

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 9, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8003654899
July 12, 2024
7CGC759911
FO1-AA67-M
Test 2
@55Hz
Test 3
@50Hz
V349N-012400
Test 1
@60Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. Test #1 at 60Hz. Test #2 at 55Hz. Test #3 was normal operation at 50Hz. 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL #7A
Location: 917 6 CIRCLE CITY DR CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: V349N-012400 Pump Ref. #: 36388
1) Based on SCE testing between 2020 and 2024, the average annual acre-feet is 1,099.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost
The hydraulic test results indicate that this pump is operating in an efficient manner.

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8003654899
July 12, 2024
545,304
140.30
$0.08342
861.7
$52.79
$45,489

66.63 633
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on April 09, 2024, billing history for the past 12 months, and your current rate of TP2D49.

It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #7A
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: V349N-012400 Pump Ref. #: 36388 2020 to 2024 Avg AF 11/3/2020 1098.8
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/9/2024 104.6 170.7 1204 412.3 140.3 66.6 632.8 861.7 $52.80 11/9/2022 101.8 185.1 695 420.3 80 68.8 625.1 1255.2 $50.00 11/3/2020 104.2 151.8 701 392.5 74.7 69.4 578.7 1179.7 $25.20 1/31/2018 105.1 168.6 1006 411.4 109 71.5 588.4 677.4 $29.40 3/3/2015 103.9 163 786 403 98 60.9 677.1 1189.3 75
Confidential / Proprietary
917 6 CIRCLE CITY DR CORONA CA US 92879
July 12, 2024
8003654899
Pumping Lvl, 170.7
GPM, 1204
Total Head, 412.3
Disch PSI, 104.6
kW, 140.3
OPE, 66.6
0 20
40 60
80 100
120
140
160
0 200
400
600
800
1000
1200
1400
OPE, 66.6
$/AF, $52.80
Annual AF, 861.7
2020 to 2024 Avg AF, 1098.8
2020 to 2024 Avg AF, 1098.8
kWh/AF, 632.8
0 200
400
600
800
1000
1200
1400
0 10
20 30
40 50
60 70
80 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL # 8-A
Location: 219 S JOY ST CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 33379
Equipment
HP: 350
Pump: No:

Motor: AUROR No:

Results
Discharge Pressure, PSI 148.3 138.1 121.8
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 342.6 319.0 281.4
Pumping Water Level, Feet 104.3 101.4 97.6
Total Head, Feet 446.9 420.4 379.0
Capacity, GPM 2,312 1,734 656
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 10.219 7.664 2.900
kW Input to Motor 267.3 184.6 90.5
HP Input to Motor 358.4 247.5 121.4
Motor Load (%) 98.2 67.8 33.3
Measured Speed of Pump, RPM
Customer Meter, GPM 2,252 1,680 640
kWH per Acre Foot 628 578 749
Overall Plant Efficiency (%) 72.8 74.4 51.7

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 9, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8001628560
July 12, 2024
800066945
Test 2
@52.5Hz
Test 3
@43.5Hz
V349N-002850
Test 1
@60Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. Post-Test. Test #1 at 60Hz. Test #2 at 52.5Hz. Test #3 was normal operation at 43.5Hz. 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
POST TEST ANALYSIS: WELL # 8-A
Location: 219 S JOY ST CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: V349N-002850 Pump Ref. #: 33379
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8001628560
July 12, 2024
POST-TEST RESULTS - The hydraulic test results indicate that this pump is operating at 72.8% as a result of your recent pumping plant renovation.

The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison post test performed on April 9, 2024, the baseline Acre-Feet per Year of water pumped and average cost per kilowatt-hour from the test performed on October 20, 2020.

Baseline Test Post Test
10/20/2020 04/09/2024 Savings
1,117,817 906,353 211,464
128.90 267.30
1,443.51
774 628 146
$.10758
$83.31 $67.56 $15.75
$120,255 $97,524

58.7% 72.8%
$22,731
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL # 8-A
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: V349N-002850 Pump Ref. #: 33379 2019 to 2024 Avg AF 8/21/2019 1210.2
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/9/2024 148.3 104.3 2312 446.9 267.3 72.8 627.9 610.1 $48.60 10/20/2020 146.3 106.5 904 444.5 128.9 58.7 774.4 1443.5 $83.30 8/21/2019 140 118.2 1036 441.6 143.3 60.1 751.2 1577 $30.00 8/28/2017 108.7 120.1 1393 371.2 150.4 64.7 586.4 2226.7 $23.50 1/27/2015 125.8 119.8 1363 410.4 160 65.8 637.5 2092.7 82.3 Confidential / Proprietary
219 S JOY ST CORONA CA US 92879
July 12, 2024
8001628560
Pumping Lvl, 104.3
GPM, 2312
Total Head, 446.9
Disch PSI, 148.3
kW, 267.3
OPE, 72.8
0 50
100
150
200
250
300
0 500
1000
1500
2000
2500
OPE, 72.8
$/AF, $48.60
Annual AF, 610.1
2019 to 2024 Avg AF, 1210.2
2019 to 2024 Avg AF, 1210.2
kWh/AF, 627.9
0 500
1000
1500
2000
2500
0 10
20 30
40 50
60 70
80 90
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #9A
Location: 505 9 S VICENTIA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 7516
Equipment
HP: 125
Pump: No:

Motor: US No:

Results
Discharge Pressure, PSI 18.1 17.3 18.1
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 41.8 40.0 41.8
Pumping Water Level, Feet 136.6 133.8 132.9
Total Head, Feet 178.4 173.8 174.7
Capacity, GPM 1,227 910 706
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 5.423 4.022 3.121
kW Input to Motor 69.1 52.0 43.1
HP Input to Motor 92.7 69.7 57.8
Motor Load (%) 70.7 53.2 44.1
Measured Speed of Pump, RPM 1,730 1,573 1,478
Customer Meter, GPM 1,225 907 708
kWH per Acre Foot 306 310 332
Overall Plant Efficiency (%) 59.7 57.3 53.9

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 23, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8004649539
July 12, 2024
E110100672100R
Test 2
@53Hz
Test 3
@49.4Hz
V349N-002722
Test 1
@57.8Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 57.81Hz. Test #2 at

53.7Hz. Test #3 is normal operation at 49.4Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL #9A
Location: 505 9 S VICENTIA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: V349N-002722 Pump Ref. #: 7516
1) Overall plant efficiency can be improved from 59.7% to 69%. 2) This can save you up to 50,543 kWh and $3,869 annually. 3) These kWh savings translate to a 26.89-ton decrease in CO² emissions. 4) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 1,267.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on April 23, 2024, billing history for the past 12 months, and your current rate of TP2D49.
1005269861 8004649539
July 12, 2024
Assuming the water requirements will be the same as for the past year, and all operating conditions (annual hours of operation, head above and water pumping level) will remain the same as they were at the time of the pump test, it is estimated that:

Existing Improved Savings
373,284 322,741 50,543
306 264 41
1,220.5
$0.07655

69.10 59.74 9.36
$3.17

59.66 69.00
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
$23.41 $20.24
$28,575 $24,706 $3,869
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #9A
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: V349N-002722 Pump Ref. #: 7516 2019 to 2024 Avg AF 8/21/2019 1266.7
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/23/2024 18.1 136.6 1227 178.4 69.1 59.7 305.8 1220.5 $23.40 12/1/2022 18.4 194.2 1010 236.7 75.2 59.9 404.4 1151.3 $32.30 8/21/2019 12.9 149.8 909 179.6 62.1 49.5 371 1428.3 $14.80 10/2/2017 18.2 191.7 1057 233.7 79.1 58.8 406.4 1191.9 $20.30 2/3/2015 15.9 188 1140 224.7 77 62.6 366.8 1610.6 48.2
Confidential / Proprietary
505 9 S VICENTIA AVE CORONA CA US 92882
July 12, 2024
8004649539
Pumping Lvl, 136.6
GPM, 1227
Total Head, 178.4
Disch PSI, 18.1
kW, 69.1
OPE, 59.7
0 10
20 30
40 50
60 70
80 90
0 200
400
600
800
1000
1200
1400
OPE, 59.7
$/AF, $23.40
Annual AF, 1220.5
2019 to 2024 Avg AF, 1266.7
2019 to 2024 Avg AF, 1266.7
kWh/AF, 305.8
0 200
400
600
800
1000
1200
1400
1600
1800
0 10
20 30
40 50
60 70
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL # 11A
Location: 1865 16 POMONA RD CORONA CA US 92878
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 34879
Equipment
HP: 150
Pump: No:

Motor: US No:

Results
Discharge Pressure, PSI 169.3 154.7 141.7
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 391.1 357.4 327.3
Pumping Water Level, Feet 175.9 163.7 154.3
Total Head, Feet 567.0 521.1 481.6
Capacity, GPM 686 524 363
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 3.032 2.316 1.604
kW Input to Motor 98.8 73.4 53.4
HP Input to Motor 132.5 98.4 71.6
Motor Load (%) 84.6 62.9 45.7
Measured Speed of Pump, RPM 1,743 1,622 1,503
Customer Meter, GPM 652 503 351
kWH per Acre Foot 782 761 799
Overall Plant Efficiency (%) 74.1 70.0 61.7

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 17, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8000272664
July 12, 2024
321970016R0005
Test 2
@54.7Hz
Test 3
@50.7Hz
V349N-018599
Test 1
@59Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 59.0Hz. Test #2 at

54.7Hz. Test #3 at 50.7Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL # 11A
Location: 1865 16 POMONA RD CORONA CA US 92878
Bus.Part.ID: Contract ID:

Meter: V349N-018599 Pump Ref. #: 34879
1) Based on SCE testing between 2020 and 2024, the average annual acre-feet is 684.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost
The hydraulic test results indicate that this pump is operating in an efficient manner.

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8000272664
July 12, 2024
596,040

98.80 $0.07530
762.0
$58.90
$44,882

74.13 782
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on April 17, 2024, billing history for the past 12 months, and your current rate of TP2D49.

It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL # 11A
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: V349N-018599 Pump Ref. #: 34879 2020 to 2024 Avg AF 10/13/2020 684.2
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/17/2024 169.3 175.9 686 567 98.8 74.1 782.2 762 $58.90 12/13/2022 132.2 172.1 607 477.5 77 70.9 688.9 864.7 $55.10 10/13/2020 127.1 155 812 448.6 93 73.8 622 425.8 $70.00 1/31/2018 131.4 162 604 465.5 83.9 63.1 754.4 425.8 $37.70 2/24/2015 149.5 168.5 557 513.8 87 61.9 848.3 717 91.4
Confidential / Proprietary
1865 16 POMONA RD CORONA CA US 92878
July 12, 2024
8000272664
Pumping Lvl, 175.9
GPM, 686
Total Head, 567
Disch PSI, 169.3
kW, 98.8
OPE, 74.1
0 20
40 60
80 100
120
140
160
180
0 100
200
300
400
500
600
700
800
900
OPE, 74.1
$/AF, $58.90
Annual AF, 762
2020 to 2024 Avg AF, 684.2
2020 to 2024 Avg AF, 684.2
kWh/AF, 782.2
0 100
200
300
400
500
600
700
800
900
1000
0 10
20 30
40 50
60 70
80 90
100
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL # 12
Location: 519 S MAPLE ST CORONA CA US 92878
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 33380
Equipment
HP: 150
Pump: INGER No:

Motor: US No:

Results
Discharge Pressure, PSI 167.5 157.4 148.6
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 386.9 363.6 343.3
Pumping Water Level, Feet 164.5 161.9 159.6
Total Head, Feet 551.4 525.5 502.9
Capacity, GPM 615 516 420
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 2.718 2.281 1.856
kW Input to Motor 96.7 81.0 68.1
HP Input to Motor 129.7 108.6 91.3
Motor Load (%) 82.8 69.4 58.3
Measured Speed of Pump, RPM
Customer Meter, GPM 609 510 412
kWH per Acre Foot 854 853 881
Overall Plant Efficiency (%) 66.0 63.0 58.4

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 17, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8000188806
July 12, 2024
4CGC745271
0230714459GT01
Test 2
@57Hz
Test 3
@55.1Hz
259000-017437
Test 1
@59.1Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 59.1Hz. Test #2 at

57.0Hz. Test #3 at 55.1Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL # 12
Location: 519 S MAPLE ST CORONA CA US 92878
Bus.Part.ID: Contract ID:

Meter: 259000-017437 Pump Ref. #: 33380
1) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 742.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost
The hydraulic test results indicate that this pump is operating in an efficient manner.

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8000188806
July 12, 2024
654,516

96.70 $0.18437
766.5
$157.44
$120,673

66.04 854
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on April 17, 2024, billing history for the past 12 months, and your current rate of TP2D49.

It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL # 12
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 259000-017437 Pump Ref. #: 33380 2019 to 2024 Avg AF 8/14/2019 742.3
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/17/2024 167.5 164.5 615 551.4 96.7 66 853.9 766.5 $157.40 12/13/2022 144.8 171.3 614 505.8 87.1 67.1 770.4 695.7 $123.30 8/14/2019 126.5 161.3 356 453.5 56.2 54.1 857.3 764.7 $85.70 10/9/2017 119.8 165.3 673 442 78.3 71.5 631.9 627.5 $69.50 1/27/2015 144.9 174.9 668 509.6 90 71.2 731.7 1134.3 78.8 Confidential / Proprietary
519 S MAPLE ST CORONA CA US 92878
July 12, 2024
8000188806
Pumping Lvl, 164.5
GPM, 615
Total Head, 551.4
Disch PSI, 167.5
kW, 96.7
OPE, 66
0 20
40 60
80 100
120
140
160
180
0 100
200
300
400
500
600
700
800
OPE, 66
$/AF, $157.40
Annual AF, 766.5 2019 to 2024 Avg AF, 742.3
2019 to 2024 Avg AF, 742.3
kWh/AF, 853.9
0 200
400
600
800
1000
1200
0 20
40 60
80 100
120
140
160
180
300 NORTH PEPPER AVE
RIALTO, CA 92376

Confidential/Proprietary Information

CORONA, CITY OF
730 CORPORATION YARD WAY
CORONA, CA 92880

ZACK REID
September 22, 2017
HYDRAULIC TEST RESULTS: WELL #14
Meter: Pump Ref.#:

Cust #: 0-000-7135 Serv. Acct. #: 025-7701-98
259000-017012 36389
Location: 1200 W 10TH ST, CORONA, CA 92882
No:

No:

Motor:

Pump:

Equipment
PEERL
US
226791
001248-001R-02
In accordance with your request, an energy efficiency test was performed on your turbine well pump on August 28, 2017. If you have any questions regarding the results which follow, please contact Adam McCamish at +1 (951) 233-8957.

HP: 150.0
Results
Test 1
Discharge Head, Feet
Capacity, GPM
GPM per Foot Drawdown
Total Head, Feet
Pumping Water Level, Feet
Drawdown, Feet
Standing Water Level, Feet
Discharge Pressure, PSI 71.0
164.0
262.2
426.2
726
kW Input to Motor
HP Input to Motor
Acre Feet Pumped in 24 Hours
Motor Load (%)

3.209
115.9

71.4 86.4
Measured Speed of Pump, RPM
Customer Meter, GPM 712
kWh per Acre Foot 646
Overall Plant Efficiency (%) 67.4
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level.

Ronald Ford
Manager
Hydraulic Services

800098753 V 1.02 09/22/2017
Confidential/Proprietary Information

CORONA, CITY OF
730 CORPORATION YARD WAY
CORONA, CA 92880

ZACK REID
September 22, 2017
Meter:

Pump Ref.#:

CSS Serv. Acct.:

CSS Cust #: 0-000-7135
025-7701-98 259000-017012
36389
PUMPING COST ANALYSIS: WELL #14
Location: 1200 W 10TH ST, CORONA, CA 92882
CRM Cust #:

CRM Serv. Acct.:
0063996535
0053113838
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on August 28, 2017, billing history for the past 12 months, and your current rate of TOU-PA2B.

Overall Plant Efficiency (%)
Total Annual Cost
Existing
630,288

86.4 646
975.2
$0.09
$58.17

67.4 $56,725.92
Total kWh
Acre Feet per Year
Average Cost per kWh
Average Cost per Acre Foot
kWh per Acre Foot
kW Input
The hydraulic test results indicate that this pump is operating in an efficient manner.

It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum pumping efficiency will be continued. If you have any questions regarding this report, please contact Adam McCamish at +1 (951) 233-8957.

Ronald Ford
Manager
Hydraulic Services
800098753 V 1.02 09/22/2017

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #15
Location: 102 N LINCOLN AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 36328
Equipment
HP: 250
Pump: PEERL No:

Motor: US No:

Results
Discharge Pressure, PSI 142.8 140.6 134.3
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 329.9 324.8 310.2
Pumping Water Level, Feet 122.1 120.3 116.1
Total Head, Feet 452.0 445.1 426.3
Capacity, GPM 650 574 348
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 2.873 2.537 1.538
kW Input to Motor 72.0 63.3 44.2
HP Input to Motor 96.6 84.9 59.3
Motor Load (%) 36.8 32.4 22.6
Measured Speed of Pump, RPM
Customer Meter, GPM 634 557 347
kWH per Acre Foot 602 599 690
Overall Plant Efficiency (%) 76.8 76.0 63.2

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 17, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8000641585
July 12, 2024
290750003R0001
Test 2
@57.4Hz
Test 3
@53.5Hz
359150-001239
Test 1
@59.4Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 59.4Hz. Test #2 at

57.4Hz. Test #3 at 53.5Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
POST TEST ANALYSIS: WELL #15
Location: 102 N LINCOLN AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: 359150-001239 Pump Ref. #: 36328
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8000641585
July 12, 2024
POST-TEST RESULTS - The hydraulic test results indicate that this pump is operating at 76.8% as a result of your recent pumping plant renovation.

The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison post test performed on April 17, 2024, the baseline Acre-Feet per Year of water pumped and average cost per kilowatt-hour from the test performed on December 7, 2022.

Baseline Test Post Test
12/07/2022 04/17/2024 Savings
819,396 691,534 127,862

88.20 72.00 16.20
1,149.55
713 602 111
$.07000
$49.90 $42.11 $7.79
$57,358 $48,407

62.7% 76.8%
$8,951
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #15
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 359150-001239 Pump Ref. #: 36328 2019 to 2024 Avg AF 8/14/2019 956.1
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/17/2024 142.8 122.1 650 452 72 76.8 601.6 675.7 $48.70 12/7/2022 120.4 159.2 672 437.3 88.2 62.7 712.8 1149.5 $49.90 8/14/2019 130.8 151.6 861 453.7 103.3 71.2 651.6 1043.1 $26.10 8/28/2017 84.2 172.8 886 367.3 97.6 62.8 598.3 1337.4 $23.90 9/8/2015 111.9 131.8 921 390.3 108.5 62.4 639.8 1470.1 70.1 Confidential / Proprietary
102 N LINCOLN AVE CORONA CA US 92882
July 12, 2024
8000641585
Pumping Lvl, 122.1
GPM, 650
Total Head, 452
Disch PSI, 142.8
kW, 72
OPE, 76.8
0 20
40 60
80 100
120
140
160
0 100
200
300
400
500
600
700
800
900
1000
OPE, 76.8
$/AF, $48.70
Annual AF, 675.7
2019 to 2024 Avg AF, 956.1
2019 to 2024 Avg AF, 956.1
kWh/AF, 601.6
0 200
400
600
800
1000
1200
1400
1600
0 10
20 30
40 50
60 70
80 90
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #17
Location: 1052 QUARRY ST CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 13293
Equipment
HP: 200
Pump: No:

Motor: US No:

Results
Discharge Pressure, PSI 126.4 124.9 123.2
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 292.0 288.5 284.6
Pumping Water Level, Feet 108.1 103.7 95.2
Total Head, Feet 400.1 392.2 379.8
Capacity, GPM 1,524 1,244 614
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 6.736 5.498 2.714
kW Input to Motor 157.1 122.9 72.2
HP Input to Motor 210.7 164.8 96.8
Motor Load (%) 101.3 79.3 46.6
Measured Speed of Pump, RPM 1,787 1,654 1,482
Customer Meter, GPM 1,520 1,240 605
kWH per Acre Foot 560 537 639
Overall Plant Efficiency (%) 73.1 74.8 60.8

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on May 8, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8005156116
July 12, 2024
F0601061180GT0
Test 2
@55.2Hz
Test 3
@49.5Hz
359150-009853
Test 1
@59.7Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. Test #1 at 59.7Hz. Test #2 at 48.6Hz. Test #3 at 49.5Hz. 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
POST TEST ANALYSIS: WELL #17
Location: 1052 QUARRY ST CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: 359150-009853 Pump Ref. #: 13293
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8005156116
July 12, 2024
POST-TEST RESULTS - The hydraulic test results indicate that this pump is operating at 73.1% as a result of your recent pumping plant renovation.

The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison post test performed on May 8, 2024, the baseline Acre-Feet per Year of water pumped and average cost per kilowatt-hour from the test performed on November 9, 2022.

Baseline Test Post Test
11/09/2022 05/08/2024 Savings
954,936 645,483 309,453
100.50 157.10
1,152.99
828 560 268
$.08000
$66.26 $44.79 $21.47
$76,395 $51,639

54.2% 73.1%
$24,756
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #17
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 359150-009853 Pump Ref. #: 13293 2020 to 2024 Avg AF 11/3/2020 833.1
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 5/8/2024 126.4 108.1 1524 400.1 157.1 73.1 559.8 424.1 $54.60 11/9/2022 133.1 131.5 659 439 100.5 54.2 828.2 1153 $66.30 11/3/2020 143 103.1 609 433.4 94 52.9 838.3 922.3 $37.60 1/13/2015 132.9 126.8 1248 433.8 145 70.3 631 1088.9 $86.60 Confidential / Proprietary
1052 QUARRY ST CORONA CA US 92879
July 12, 2024
8005156116
Pumping Lvl, 108.1
GPM, 1524
Total Head, 400.1
Disch PSI, 126.4
kW, 157.1
OPE, 73.1
0 20
40 60
80 100
120
140
160
180
0 200
400
600
800
1000
1200
1400
1600
1800
OPE, 73.1
$/AF, $54.60
Annual AF, 424.1
2020 to 2024 Avg AF, 833.1
2020 to 2024 Avg AF, 833.1
kWh/AF, 559.8
0 200
400
600
800
1000
1200
1400
0 10
20 30
40 50
60 70
80 90
100
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL 19
Location: 219 W GRAND BLVD CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 33270
Equipment
HP: 75
Pump: FLOWISE No:

Motor: US No:

Results
Discharge Pressure, PSI 28.6 28.8 27.6
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 66.1 66.5 63.8
Pumping Water Level, Feet 110.1 106.8 103.2
Total Head, Feet 176.2 173.3 167.0
Capacity, GPM 922 731 477
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 4.075 3.231 2.108
kW Input to Motor 50.4 37.3 25.2
HP Input to Motor 67.6 50.0 33.8
Motor Load (%) 85.6 63.4 42.8
Measured Speed of Pump, RPM
Customer Meter, GPM 948 739 497
kWH per Acre Foot 297 277 287
Overall Plant Efficiency (%) 60.7 64.0 59.5

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on May 8, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8000521943
July 12, 2024
76894410017M0010
Test 2
@54.6Hz
Test 3
@50.4Hz
259000-077761
Test 1
@58.6Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 58.6Hz. Test #2 at

54.6Hz. Test #3 is normal operation at 50.4Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL 19
Location: 219 W GRAND BLVD CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: 259000-077761 Pump Ref. #: 33270
1) Overall plant efficiency can be improved from 60.7% to 69%. 2) This can save you up to 34,247 kWh and $7,230 annually. 3) These kWh savings translate to a 18.22-ton decrease in CO² emissions. 4) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 1,152.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on May 08, 2024, billing history for the past 12 months, and your current rate of TP2E49.
1005269861 8000521943
July 12, 2024
Assuming the water requirements will be the same as for the past year, and all operating conditions (annual hours of operation, head above and water pumping level) will remain the same as they were at the time of the pump test, it is estimated that:

Existing Improved Savings
284,280 250,033 34,247
297 261 36
957.6
$0.21111

50.40 44.33 6.07
$7.55

60.69 69.00
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
$62.67 $55.12
$60,014 $52,784 $7,230
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL 19
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 259000-077761 Pump Ref. #: 33270 2019 to 2024 Avg AF 8/21/2019 1151.6
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 5/8/2024 28.6 110.1 922 176.2 50.4 60.7 296.9 957.6 $62.70 12/1/2022 28.3 143 708 208.4 40.9 67.9 313.7 925.3 $53.30 11/3/2020 26 113.8 779 173.9 36 70.8 251 1420.7 $31.60
8/21/2019 27.5 117.4 852 180.9 41.6 69.8 265.2 1303 $29.20 Confidential / Proprietary
219 W GRAND BLVD CORONA CA US 92882
July 12, 2024
8000521943
Pumping Lvl, 110.1
GPM, 922
Total Head, 176.2
Disch PSI, 28.6
kW, 50.4
OPE, 60.7
0 10
20 30
40 50
60 70
80 0
100
200
300
400
500
600
700
800
900
1000
OPE, 60.7
$/AF, $62.70
Annual AF, 957.6
2019 to 2024 Avg AF, 1151.6
2019 to 2024 Avg AF, 1151.6
kWh/AF, 296.9
0 200
400
600
800
1000
1200
1400
1600
0 10
20 30
40 50
60 70
80 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL 22
Location: 405 SIERRA VISTA ST CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 33142
Equipment
HP: 200
Pump: PEERL No:

Motor: US No:

Results
Discharge Pressure, PSI 14.7 17.0 16.6
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 34.0 39.3 38.3
Pumping Water Level, Feet 169.7 160.8 155.5
Total Head, Feet 203.7 200.1 193.8
Capacity, GPM 1,762 1,427 1,073
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 7.788 6.307 4.743
kW Input to Motor 111.7 91.0 78.3
HP Input to Motor 149.8 122.0 105.0
Motor Load (%) 71.7 58.5 50.3
Measured Speed of Pump, RPM 1,700 1,606 1,520
Customer Meter, GPM 1,762 1,427 1,073
kWH per Acre Foot 344 346 396
Overall Plant Efficiency (%) 60.5 59.1 50.0

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on May 2, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8003136770
July 12, 2024
99J61268
033640003R0001
Test 2
@53.6Hz
Test 3
@50.9Hz
V349N-016351
Test 1
@56.8Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. We were unable to measure GPM flow. Therefore the above test results were obtained using your water meter. Test #1 at 56.8Hz. Test #2 at

53.6Hz. Test #3 at 50.9Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL 22
Location: 405 SIERRA VISTA ST CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: V349N-016351 Pump Ref. #: 33142
1) Overall plant efficiency can be improved from 60.5% to 69%. 2) This can save you up to 95,295 kWh and $7,533 annually. 3) These kWh savings translate to a 50.70-ton decrease in CO² emissions. 4) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 2,270.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on May 02, 2024, billing history for the past 12 months, and your current rate of TP2D49.
1005269861 8003136770
July 12, 2024
Assuming the water requirements will be the same as for the past year, and all operating conditions (annual hours of operation, head above and water pumping level) will remain the same as they were at the time of the pump test, it is estimated that:

Existing Improved Savings
773,244 677,949 95,295
344 302 42
2,246.0
$0.07905
111.70 97.93 13.77
$3.35

60.50 69.00
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
$27.22 $23.86
$61,125 $53,592 $7,533
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL 22
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: V349N-016351 Pump Ref. #: 33142 2019 to 2024 Avg AF 8/14/2019 2270.3
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 5/2/2024 14.7 169.7 1762 203.7 111.7 60.5 344.3 2246 $27.20 10/19/2022 16.2 194.6 1866 232 130.4 62.5 379.5 1910 $30.40 10/27/2020 17.2 167 1511 206.7 96.6 60.9 347.2 2270.4 $39.90 8/14/2019 12.6 151.8 1348 180.9 88.2 52.1 355.3 2654.8 $14.20 10/9/2017 24.2 173 1738 228.9 119.9 62.5 374.7 1323.6 18.7 2/24/2015 17.2 166.7 2047 206.4 131 60.7 347.6 2783.9 37.7 Confidential / Proprietary
405 SIERRA VISTA ST CORONA CA US 92882
July 12, 2024
8003136770
Pumping Lvl, 169.7
GPM, 1762
Total Head, 203.7
Disch PSI, 14.7
kW, 111.7
OPE, 60.5
0 20
40 60
80 100
120
140
0 500
1000
1500
2000
2500
OPE, 60.5
$/AF, $27.20
2019 to 2024 Avg AF, 2270.3 Annual AF, 2246
2019 to 2024 Avg AF, 2270.3
kWh/AF, 344.3
0 500
1000
1500
2000
2500
3000
0 10
20 30
40 50
60 70
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #25
Location: 310 S VICENTIA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 33139
Equipment
HP: 100
Pump: Johnston No:

Motor: US No:

Results
Discharge Pressure, PSI 21.5 21.9 20.7
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 49.7 50.6 47.8
Pumping Water Level, Feet 125.0 126.3 123.3
Total Head, Feet 174.7 176.9 171.1
Capacity, GPM 1,210 1,357 1,014
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 5.348 5.998 4.482
kW Input to Motor 59.8 71.0 47.1
HP Input to Motor 80.2 95.2 63.2
Motor Load (%) 76.5 90.8 60.3
Measured Speed of Pump, RPM
Customer Meter, GPM 1,211 1,352 1,010
kWH per Acre Foot 268 284 252
Overall Plant Efficiency (%) 66.6 63.7 69.4

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 23, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8004373720
July 12, 2024
99JG1271
526430020M0008
Test 2
@59.9Hz
Test 3
@53.5Hz
359150-000998
Test 1
@57.1Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 57.1Hz normal operation. Test #2 at 59.9Hz. Test #3 at 53.5Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL #25
Location: 310 S VICENTIA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: 359150-000998 Pump Ref. #: 33139
1) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 1,034.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost
The hydraulic test results indicate that this pump is operating in an efficient manner.

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8004373720
July 12, 2024
479,988

59.80 $0.08450
1,788.3
$22.68
$40,559

66.55 268
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on April 23, 2024, billing history for the past 12 months, and your current rate of TP2E49.

It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #25
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 359150-000998 Pump Ref. #: 33139 2019 to 2024 Avg AF 8/14/2019 1033.5
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/23/2024 21.5 125 1210 174.7 59.8 66.6 268.4 1788.3 $22.70 10/19/2022 22.3 145.5 1224 197 63.6 71.4 282.2 631.1 $31.00 10/27/2020 20.2 123.3 481 170 43.7 35.2 493.4 803.8 $57.40 8/14/2019 19.5 126 497 171 43.6 36.7 476.4 911 $23.80
10/2/2017 19.8 149.7 1506 195.4 85.6 64.7 308.7 1783.3 18.5 2/16/2016 20.6 141.1 1158 188.7 65.8 62.5 308.6 848.8 40.8 1/13/2015 19.6 130.4 431 175.7 49 29.1 617.4 674.4 74.3 Confidential / Proprietary
310 S VICENTIA AVE CORONA CA US 92882
July 12, 2024
8004373720
Pumping Lvl, 125
GPM, 1210
Total Head, 174.7
Disch PSI, 21.5
kW, 59.8
OPE, 66.6
0 10
20 30
40 50
60 70
80 90
0 200
400
600
800
1000
1200
1400
1600
OPE, 66.6
$/AF, $22.70
Annual AF, 1788.3
2019 to 2024 Avg AF, 1033.5
2019 to 2024 Avg AF, 1033.5
kWh/AF, 268.4
0 200
400
600
800
1000
1200
1400
1600
1800
2000
0 10
20 30
40 50
60 70
80 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #26
Location: 710 PUBLIC SAFETY WAY CORONA CA US 92878
Bus.Part.ID: Contract ID:

Meter: 259000-078041 Pump Ref. #: 33381
Equipment
HP: 75
Pump: GOULD No:

Motor: US No:

Results
Discharge Pressure, PSI 48.8 48.4 48.4
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 112.7 111.8 111.8
Pumping Water Level, Feet 213.3 198.9 184.3
Total Head, Feet 326.0 310.7 296.1
Capacity, GPM 342 312 273
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 1.512 1.379 1.207
kW Input to Motor 41.3 35.6 28.6
HP Input to Motor 55.4 47.7 38.4
Motor Load (%) 70.2 60.5 48.6
Measured Speed of Pump, RPM 1,775 1,654 1,528
Customer Meter, GPM 325 305 251
kWH per Acre Foot 656 620 569
Overall Plant Efficiency (%) 50.8 51.3 53.2

RON FORD
Manager

PUMP TEST AND HYDRAULIC SERVICES
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. This pump is operating inefficiently. The inefficiency is most likely caused by pump wear, the failure of the pump design to meet existing conditions, or a combination of both. Test #1 at 57.2Hz. Test #2 at 55.4Hz. Test #3 is normal operation at

51.9Hz.

Test 1
@57.2Hz
Test 2
@55.4Hz
Test 3
@51.9Hz
0 490110003M0009
In accordance with your request, an energy efficiency test was performed on your turbine well pump on December 1, 2022. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (909) 820-5269.
1005269861 8004372841
HYDRAULIC TEST RESULTS:

December 21, 2022
Confidential / Proprietary
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL #26
Location: 710 PUBLIC SAFETY WAY CORONA CA US 92878
Bus.Part.ID: Contract ID:

Meter: 259000-078041 Pump Ref. #: 33381
1) Overall plant efficiency can be improved from 50.8% to 69%. 2) This can save you up to 83,587 kWh and $6,687 annually. 3) These kWh savings translate to a 44.47-ton decrease in CO² emissions. 4) Based on SCE testing between 2021 and 2022, the average annual acre-feet is 559.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

RON FORD
Manager

PUMP TEST AND HYDRAULIC SERVICES
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (909) 820-5269.
$25,407 $18,721 $6,687
$52.47 $38.66 $13.81

50.84 69.00
484.3
$0.08000
656 483 173

41.30 30.43 10.87
317,592 234,005 83,587
Existing Improved Savings
Assuming the water requirements will be the same as for the past year, and all operating conditions (annual hours of operation, head above and water pumping level) will remain the same as they were at the time of the pump test, it is estimated that:

The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on December 01, 2022, billing history for the past 12 months, and your current rate of TP2D49. 1005269861 8004372841
December 21, 2022
Confidential / Proprietary
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #26
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 259000-078041 Pump Ref. #: 33381 2021 to 2022 Avg AF 7/29/2021 559
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 12/1/2022 48.8 213.3 342 326 41.3 50.8 655.8 484.3 $52.50 7/29/2021 49 231 389 344.2 48.8 51.7 681.3 633.6 $54.80 3/3/2015 45.9 283.5 393 389.5 45 64.1 621.9 633.6 $65.90 7/18/2013 46.1 277.8 468 384.3 47 72.1 545.4 60.4 $63.60 8004372841
710 PUBLIC SAFETY WAY CORONA CA US 92878
December 21, 2022
Confidential / Proprietary
Pumping Lvl, 213.3
GPM, 342
Total Head, 326
Disch PSI, 48.8
kW, 41.3
OPE, 50.8
0 10
20 30
40 50
60 70
80 0
50 100
150
200
250
300
350
400
450
500
OPE, 50.8
$/AF, $52.50
Annual AF, 484.3
2021 to 2022 Avg AF, 559
2021 to 2022 Avg AF, 559
kWh/AF, 655.8
0 100
200
300
400
500
600
700
800
0 10
20 30
40 50
60 70
80 300 NORTH PEPPER AVE
RIALTO, CA 92376
Confidential / Proprietary

JUSTIN AMON

CORONA, CITY OF
400 VICENTIA AVENUE
CORONA, CA 92882-2187
WELL 27
Location: 2581 MANGULAR AVE, CORONA, CA 92882-5790
Cust #: Serv. Acct #:

Meter: 256000-047372 Pump Ref.#: 33265
Equipment
HP: 75
Pump: PEERL No:

Motor: US No:

Results
Discharge Pressure, PSI 2.6 1.3 1.0
Standing Water Level, Feet 187.7 187.7 187.7
Drawdown, Feet 96.4 85.5 78.0
Discharge Head, Feet 6.0 3.0 2.3
Pumping Water Level, Feet 284.1 273.2 265.7
Total Head, Feet 290.1 276.2 268.0
Capacity, GPM 638 546 504
GPM per Foot Drawdown 6.6 6.4 6.5
Acre Feet Pumped in 24 Hours 2.820 2.413 2.228
kW Input to Motor 52.7 43.7 39.5
HP Input to Motor 70.7 58.6 53.0
Motor Load (%) 89.5% 74.2% 67.1%
Measured Speed of Pump, RPM
Customer Meter, GPM 634 551 506
kWH per Acre Foot 449 435 426
Overall Plant Efficiency (%) 66.1% 65.% 64.4%

RON FORD
Manager - Hydraulic Services
The above test results indicate various operating conditions on this pump.

59.6 Hz 57.0 Hz 55.6 Hz
238749
A047712562-0062M
In accordance with your request, an energy efficiency test was performed on your turbine well pump on October 30, 2019. If you have any questions regarding the results which follow, please contact JUSTIN JOHNSON at (909) 820-5517.

HYDRAULIC TEST RESULTS:
0-000-7135 021-6660-99
November 14, 2019
Confirmation #800115875
300 North Pepper Ave
Rialto, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #28
Location: 202 N BUENA VISTA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 33140
Equipment
HP: 200
Pump: FLOWS No:

Motor: US No:

Results
Discharge Pressure, PSI 37.3 36.5
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 86.2 84.3
Pumping Water Level, Feet 123.8 100.0
Total Head, Feet 210.0 184.3
Capacity, GPM 827 512
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 3.655 2.263
kW Input to Motor 52.0 36.6
HP Input to Motor 69.7 49.1
Motor Load (%) 33.4 23.5
Measured Speed of Pump, RPM
Customer Meter, GPM 822 504
kWH per Acre Foot 341 388
Overall Plant Efficiency (%) 62.9 48.6

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on May 2, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8000511783
July 12, 2024
0311CGC77342-1
82002365015R02
Test 2
@39.4Hz
259000-053559
Test 1
@44.3Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 44.3Hz. Test #2 at

39.4Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL #28
Location: 202 N BUENA VISTA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: 259000-053559 Pump Ref. #: 33140
1) Overall plant efficiency can be improved from 62.9% to 69%. 2) This can save you up to 30,575 kWh and $2,326 annually. 3) These kWh savings translate to a 16.27-ton decrease in CO² emissions. 4) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 956.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on May 02, 2024, billing history for the past 12 months, and your current rate of TP2D49.
1005269861 8000511783
July 12, 2024
Assuming the water requirements will be the same as for the past year, and all operating conditions (annual hours of operation, head above and water pumping level) will remain the same as they were at the time of the pump test, it is estimated that:

Existing Improved Savings
344,784 314,209 30,575
341 311 30
1,009.7
$0.07609

52.00 47.39 4.61
$2.30

62.88 69.00
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
$25.98 $23.68
$26,235 $23,908 $2,326
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #28
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 259000-053559 Pump Ref. #: 33140 2019 to 2024 Avg AF 8/14/2019 956.5
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 5/2/2024 37.3 123.8 827 210 52 62.9 341.5 1009.7 $26.00 10/19/2022 36.6 117.4 723 201.9 52.3 52.6 392.9 795.2 $31.40 8/14/2019 34.3 107.3 593 186.5 40.4 51.6 370 1064.5 $14.80 10/2/2017 34.5 105.2 598 184.9 39.2 53.1 356 842.5 $17.80 7/14/2016 31.9 117.6 610 191.3 48.2 45.6 429.1 1074.9 21.5 2/3/2015 36.4 121.1 904 205.2 75 46.6 450.6 1075 50.1
Confidential / Proprietary
202 N BUENA VISTA AVE CORONA CA US 92882
July 12, 2024
8000511783
Pumping Lvl, 123.8
GPM, 827
Total Head, 210
Disch PSI, 37.3
kW, 52
OPE, 62.9
0 10
20 30
40 50
60 70
80 0
100
200
300
400
500
600
700
800
900
1000
OPE, 62.9
$/AF, $26.00
Annual AF, 1009.7
2019 to 2024 Avg AF, 956.5
2019 to 2024 Avg AF, 956.5
kWh/AF, 341.5
0 200
400
600
800
1000
1200
0 10
20 30
40 50
60 70
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL #29
Location: 240 N BUENA VISTA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 34817
Equipment
HP: 60
Pump: GOULD No:

Motor: US No:

Results
Discharge Pressure, PSI 40.5 39.2 39.4
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 93.6 90.6 91.0
Pumping Water Level, Feet 116.5 106.0 96.4
Total Head, Feet 210.1 196.6 187.4
Capacity, GPM 760 636 525
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 3.359 2.811 2.321
kW Input to Motor 51.2 39.0 30.5
HP Input to Motor 68.7 52.3 40.9
Motor Load (%) 108.7 82.8 64.8
Measured Speed of Pump, RPM
Customer Meter, GPM 728 605 506
kWH per Acre Foot 366 333 316
Overall Plant Efficiency (%) 58.7 60.4 60.7

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on May 2, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8004642642
July 12, 2024
13CMC
C05776835-0103M9
Test 2
@54.8Hz
Test 3
@50Hz
259000-018192
Test 1
@59.5Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 59.5Hz. Test #2 at

54.8Hz. Test #3 at 50.0Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL #29
Location: 240 N BUENA VISTA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: 259000-018192 Pump Ref. #: 34817
1) Overall plant efficiency can be improved from 58.7% to 65%. 2) This can save you up to 30,964 kWh and $5,814 annually. 3) These kWh savings translate to a 16.47-ton decrease in CO² emissions. 4) Based on SCE testing between 2022 and 2024, the average annual acre-feet is 931.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on May 02, 2024, billing history for the past 12 months, and your current rate of TP2D49.
1005269861 8004642642
July 12, 2024
Assuming the water requirements will be the same as for the past year, and all operating conditions (annual hours of operation, head above and water pumping level) will remain the same as they were at the time of the pump test, it is estimated that:

Existing Improved Savings
320,268 289,304 30,964
366 330 35
875.4
$0.18775

51.20 46.25 4.95
$6.64

58.72 65.00
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
$68.69 $62.05
$60,130 $54,317 $5,814
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL #29
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 259000-018192 Pump Ref. #: 34817 2022 to 2024 Avg AF 1/26/2022 930.9
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 5/2/2024 40.5 116.5 760 210.1 51.2 58.7 365.9 875.4 $68.70 12/7/2022 40.7 123.1 746 217.1 50.9 59.9 370.5 920.9 $55.60 1/26/2022 40 109.6 607 202 34 67.9 304.2 996.3 $46.70
Confidential / Proprietary
240 N BUENA VISTA AVE CORONA CA US 92882
July 12, 2024
8004642642
Pumping Lvl, 116.5
GPM, 760
Total Head, 210.1
Disch PSI, 40.5
kW, 51.2
OPE, 58.7
0 10
20 30
40 50
60 70
80 0
100
200
300
400
500
600
700
800
OPE, 58.7
$/AF, $68.70
Annual AF, 875.4
2022 to 2024 Avg AF, 930.9
2022 to 2024 Avg AF, 930.9
kWh/AF, 365.9
0 200
400
600
800
1000
1200
0 10
20 30
40 50
60 70
80 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL 31
Location: 211 N BUENA VISTA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 42870
Equipment
HP: 75
Pump: GOULDS No:

Motor: US No:

Results
Discharge Pressure, PSI 26.3 26.6 25.3
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 60.8 61.4 58.4
Pumping Water Level, Feet 110.2 111.1 109.4
Total Head, Feet 171.0 172.5 167.8
Capacity, GPM 906 1,102 712
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 4.005 4.871 3.147
kW Input to Motor 44.4 57.9 33.4
HP Input to Motor 59.5 77.6 44.8
Motor Load (%) 75.4 98.3 56.7
Measured Speed of Pump, RPM 1,637 1,780 1,502
Customer Meter, GPM 907 1,094 708
kWH per Acre Foot 266 285 255
Overall Plant Efficiency (%) 65.7 61.8 67.4

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 23, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8004088769
July 12, 2024
12CMC4
621840020M0004
Test 2
@59.5Hz
Test 3
@51.2Hz
259000-025616
Test 1
@54.7Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. The above test results indicate various operating conditions on this pump. Test #1 at 54.7Hz. Test #2 at

59.5.1Hz. Test #3 at 50.2Hz.
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL 31
Location: 211 N BUENA VISTA AVE CORONA CA US 92882
Bus.Part.ID: Contract ID:

Meter: 259000-025616 Pump Ref. #: 42870
1) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 1,355.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost
The hydraulic test results indicate that this pump is operating in an efficient manner.

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
1005269861 8004088769
July 12, 2024
402,612

44.40 $0.18438
1,512.7
$49.07
$74,234

65.69 266
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on April 23, 2024, billing history for the past 12 months, and your current rate of TP2D49.

It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL 31
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 259000-025616 Pump Ref. #: 42870 2019 to 2024 Avg AF 8/21/2019 1355.3
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/23/2024 26.3 110.2 906 171 44.4 65.7 266.1 1512.7 $49.10 12/7/2022 27.2 125.3 1008 188.1 54.5 65.5 293.6 2018.7 $44.00 7/29/2021 25.4 117 1124 175.7 58.3 63.8 281.7 944.9 $39.00 8/21/2019 25.1 121.4 595 179.4 34.4 58.4 314 944.9 $31.40 Confidential / Proprietary
211 N BUENA VISTA AVE CORONA CA US 92882
July 12, 2024
8004088769
Pumping Lvl, 110.2
GPM, 906
Total Head, 171
Disch PSI, 26.3
kW, 44.4
OPE, 65.7
0 10
20 30
40 50
60 70
0 200
400
600
800
1000
1200
OPE, 65.7
$/AF, $49.10
Annual AF, 1512.7
2019 to 2024 Avg AF, 1355.3
2019 to 2024 Avg AF, 1355.3
kWh/AF, 266.1
0 500
1000
1500
2000
2500
0 10
20 30
40 50
60 70
300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
WELL 33
Location: 3822 GRANT ST CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: Pump Ref. #: 42899
Equipment
HP: 250
Pump: Goulds No:

Motor: US No:

Results
Discharge Pressure, PSI 117.5 114.8 110.1
Standing Water Level, Feet
Drawdown, Feet
Discharge Head, Feet 271.4 265.2 254.3
Pumping Water Level, Feet 155.7 147.3 106.7
Total Head, Feet 427.1 412.5 361.0
Capacity, GPM 1,424 1,086 665
GPM per Foot Drawdown
Acre Feet Pumped in 24 Hours 6.294 4.800 2.939
kW Input to Motor 174.0 133.4 87.5
HP Input to Motor 233.3 178.9 117.3
Motor Load (%) 89.8 68.8 45.2
Measured Speed of Pump, RPM 1,789 1,611 1,404
Customer Meter, GPM 1,424 1,086 665
kWH per Acre Foot 664 667 715
Overall Plant Efficiency (%) 65.8 63.2 51.7

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
In accordance with your request, an energy efficiency test was performed on your turbine well pump on April 9, 2024. If you have any questions regarding the results which follow, please contact ADAM MCCAMISH at (951) 233-8957.

HYDRAULIC TEST RESULTS:
1005269861 8000818223
July 12, 2024
4478369
Zo720171498-001R01
Test 2
@54Hz
Test 3
@47Hz
259000-022886
Test 1
@60Hz
At the time of arrival of the test crew, the pump was operating and was not shut down to obtain a standing water level. We were unable to measure GPM flow. Therefore the above test results were obtained using your water meter. Test #1 at 60Hz. Test #2 at 54Hz. Test #3 was normal operation at 47Hz. 300 NORTH PEPPER AVE
RIALTO, CA 92376

CHASE MICHELOTTI

CORONA, CITY OF
400 S VICENTIA AVE
CORONA, CA 92882-2187
PUMPING COST ANALYSIS: WELL 33
Location: 3822 GRANT ST CORONA CA US 92879
Bus.Part.ID: Contract ID:

Meter: 259000-022886 Pump Ref. #: 42899
1) Overall plant efficiency can be improved from 65.8% to 70%. 2) This can save you up to 31,629 kWh and $5,898 annually. 3) These kWh savings translate to a 16.83-ton decrease in CO² emissions. 4) Based on SCE testing between 2019 and 2024, the average annual acre-feet is 778.

Annual
Total kWh
kW Input
kWh per Acre-Foot
Acre-Feet per Year
Average Cost per kWH
Average Cost per Acre-Foot
Overall Plant Efficiency (%)
Total Annual Cost

STEVE VILLEGAS
Manager

PUMP TEST AND HYDRAULIC SERVICES
Confidential / Proprietary
The following energy efficiency analysis is presented as an aid to your cost accounting. This is an estimate based on the conditions present during the Edison pump test performed on April 09, 2024, billing history for the past 12 months, and your current rate of TP2D49.
1005269861 8000818223
July 12, 2024
Assuming the water requirements will be the same as for the past year, and all operating conditions (annual hours of operation, head above and water pumping level) will remain the same as they were at the time of the pump test, it is estimated that:

Existing Improved Savings
530,328 498,699 31,629
664 624 40
799.2
$0.18646
174.00 163.62 10.38
$7.38

65.83 70.00
It is sincerely hoped that this information will prove helpful to you, and that your concerns over maintaining optimum energy efficiency will be continued. If you have any questions regarding this report, please contact ADAM MCCAMISH at (951) 233-8957.
$123.74 $116.36
$98,885 $92,987 $5,898
300 NORTH PEPPER AVE
RIALTO, CA 92376
CHASE MICHELOTTI Pump Name: WELL 33
CORONA, CITY OF Location:
400 S VICENTIA AVE Bus.Part.ID: 1005269861 Contract ID:

CORONA, CA 92882-2187 Meter: 259000-022886 Pump Ref. #: 42899 2019 to 2024 Avg AF 8/21/2019 777.7
Test Date Disch PSI Pumping Lvl GPM Total Head kW OPE kWh/AF Annual AF $/AF 4/9/2024 117.5 155.7 1424 427.1 174 65.8 663.6 799.2 $123.70 11/9/2022 123.4 156.2 892 441.3 123.5 60 751.9 1375.1 $112.80 8/21/2019 125.6 109.1 1306 399.2 136.8 71.8 568.9 468.2 $74.00 8/21/2019 125.6 109.1 1306 399.2 136.8 71.8 568.9 468.2 $74.00 Confidential / Proprietary
3822 GRANT ST CORONA CA US 92879
July 12, 2024
8000818223
Pumping Lvl, 155.7
GPM, 1424
Total Head, 427.1
Disch PSI, 117.5
kW, 174
OPE, 65.8
0 20
40 60
80 100
120
140
160
180
200
0 200
400
600
800
1000
1200
1400
1600
OPE, 65.8
$/AF, $123.70
Annual AF, 799.2 2019 to 2024 Avg AF, 777.7
2019 to 2024 Avg AF, 777.7
kWh/AF, 663.6
0 200
400
600
800
1000
1200
1400
1600
0 20
40 60
80 100
120
140
300 NORTH PEPPER AVE
RIALTO, CA 92376

Appendix D
Corona’s Water Production Data

July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 18.102 12.488 18.509 15.274 18.137 20.332 18.257 121.099 371.653 Well #7A 22.512 15.045 24.353 30.55 31.471 27.136 29.199 180.266 553.236 Well #8A 58.385 53.737 50.103 52.456 51.773 51.466 19.378 337.298 1035.168 Well #9A 34.711 34.676 32.36 34.931 37.846 35.215 36.345 246.084 755.232 Well #11A 20.811 19.17 18.104 19.268 18.037 9.036 17.977 122.403 375.655 Well #12A 21.237 21.709 25.741 26.5 28.558 16.02 0.000 139.765 428.939 Well #13 0.000 0.198 6.384 2.688 0.000 0.000 0.000 9.270 28.450 Well #14 27.975 27.946 25.809 27.233 26.197 23.233 26.735 185.128 568.158 Well #15 38.823 37.889 35.213 35.908 34.171 30.346 32.474 244.824 751.365 Well #17A 16.403 19.705 35.772 38.063 38.055 28.184 37.03 213.212 654.348 Well #19 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #21 38.252 38.535 48.926 46.995 50.311 54.077 52.423 329.519 1011.294 Well #22 72.842 75.553 68.875 74.907 70.238 64.687 65.759 492.861 1512.590 Well #23 - Note 1 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #25 49.611 50.049 47.559 51.793 50.784 44.237 51.628 345.661 1060.834 Well #26 14.281 15.139 13.817 14.117 13.617 0.000 0.000 70.971 217.810 Well #27 13.747 13.759 8.266 13.031 13.12 6.961 13.405 82.289 252.545 Well #28 29.065 30.599 28.036 17.797 0.000 0.000 0.000 105.497 323.770 Well #29 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #31 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Temescal Desalter 311.821 320.574 297.445 321.078 308.496 284.051 297.719 2141.184 6571.294 Lester WR-19 68.373 0.248 0.007 0.996 58.624 292.326 392.347 812.921 2494.855 SDO WR-33 80.934 90.419 81.631 110.121 139.301 149.598 155.119 807.123 2477.060 Mills WR-24 - Note 2 20.649 11.671 79.813 46.947 91.958 12.021 51.259 314.318 964.642 Arlington Desalter 23.911 0.385 0.042 0.000 7.295 1.413 0.000 33.046 101.418 Norco Conn. 8.320 26.027 26.381 0.004 0.006 0.005 0.008 60.751 186.445 Home Gardens County Water District 8.858 7.610 8.182 8.651 9.302 10.303 11.312 64.218 197.085 Note 1 Status of Well 23 was changed to standby
Note 2 Western's WR-24 connection is not accurately recording production, using the City's Mills Z3, Z4, Z5 and Bedford Canyon's metered production until WR-24 meter is calibrated. Effective July 2015.

ANNUAL PRODUCTION 2015/2016

RECAPITULATION
Fiscal Year
Annual Totals
H:\pdata\180125\Project Files\RFIs\21-Records on Groundwater Production for Potable Use\Aug 2020 - Jan 2021\Item 18 & 21_Potable Water Production - Sources and Groundwater Wells July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 16.878 14.794 13.190 1.804 0.155 0.178 0.177 0.169 0.175 0.503 0.000 0.000 48.023 147.383 Well #7A 34.343 36.336 27.447 30.499 33.243 31.781 31.3 28.308 31.661 32.662 22.171 0.301 340.052 1043.620 Well #8A 8.839 57.468 51.493 59.438 57.322 54.779 57.926 47.562 59.7 53.505 58.318 57.025 623.375 1913.138 Well #9A 38.743 37.831 29.068 28.173 30.001 33.686 30.495 30.199 32.106 17.436 22.081 36.51 366.329 1124.264 Well #11A 17.034 6.453 14.426 13.105 9.224 10.139 5.401 9.276 5.65 9.131 5.359 5.479 110.677 339.668 Well #12A 0.000 0.000 0.000 12.942 12.429 18.31 23.513 19.153 18.282 12.415 14.641 26.300 157.985 484.856 Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #14 25.627 12.836 21.520 21.369 16.11 26.144 26.951 25.117 25.988 29.542 30.276 17.951 279.431 857.574 Well #15 15.167 17.783 29.539 25.402 31.132 33.009 33.944 32.872 38.332 37.92 37.746 34.183 367.029 1126.412 Well #17A 37.232 36.086 31.049 33.080 29.582 28.009 30.084 28.995 32.462 31.558 31.815 31.325 381.277 1170.139 Well #19 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #21 52.135 50.804 47.557 49.568 0.001 0.003 0.001 0.000 0.000 0.000 0.545 0.991 201.605 618.726 Well #22 67.784 65.527 50.291 41.407 34.361 36.424 44.641 45.374 39.604 51.567 62.11 59.338 598.428 1836.576 Well #25 33.398 49.747 38.210 37.206 36.384 38.659 37.986 37.536 40.112 43.059 46.549 48.221 487.067 1494.809 Well #26 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #27 11.895 8.984 7.109 11.488 13.143 13.405 7.819 2.768 8.619 7.981 5.934 5.733 104.878 321.871 Well #28 26.526 26.962 23.977 20.176 24.672 23.237 18.143 13.873 21.760 14.672 21.643 20.896 256.537 787.312 Well #29 0.000 0.000 0.000 2.206 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.206 6.770 Well #31 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Temescal Desalter 283.453 320.817 291.648 300.879 291.738 309.149 310.218 286.129 314.852 303.39 319.625 307.09 3638.988 11168.054 Lester WR-19 435.014 439.09 391.637 328.935 282.768 102.531 4.484 2.783 120.761 383.184 468.511 457.273 3416.971 10486.684 SDO WR-33 171.16 173.974 158.848 143.167 131.52 108.378 77.250 66.594 97.155 135.549 148.49 154.083 1566.171 4806.579 Mills WR-24 127.105 93.660 78.214 46.031 7.128 0.931 0.370 2.098 82.158 1.298 3.331 100.202 542.526 1665.012 Arlington Desalter 0.000 0.000 0.000 0.000 27.813 61.544 55.505 51.094 53.694 28.507 19.379 6.252 303.788 932.325 Norco Conn. 0.010 0.009 1.078 0.002 0.001 0.001 0.001 0.001 3.217 0.003 0.002 0.003 4.328 13.283 Home Gardens County Water District 11.793 11.834 10.914 9.915 8.835 8.945 7.496 6.956 9.235 10.005 11.373 11.554 118.855 364.766 ANNUAL PRODUCTION 2016/2017

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #7A 0.000 0.000 0.000 0.000 0.01 39.408 42.612 34.633 29.349 33.863 36.175 35.415 251.465 771.746 Well #8A 61.158 57.662 58.339 61.934 55.768 51.394 52.808 48.24 50.744 48.196 51.478 49.127 646.848 1985.177 Well #9A 44.149 43.451 43.919 44.721 40.758 44.43 44.27 37.793 42.794 41.47 39.679 37.881 505.315 1550.812 Well #11A 19.007 11.161 12.632 5.161 16.604 25.004 21.728 21.538 14.942 24.157 24.066 25.555 221.555 679.952 Well #12A 8.720 14.065 16.624 25.215 17.940 25.772 20.813 16.72 21.445 21.226 21.262 18.590 228.392 700.935 Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #14 30.556 29.785 29.030 26.147 23.906 29.145 28.238 25.209 27.842 26.467 28.080 26.076 330.481 1014.246 Well #15 26.748 35.084 34.416 34.431 32.773 33.742 33.302 28.447 26.918 34.284 34.9 32.075 387.120 1188.071 Well #17A 37.998 34.459 8.409 8.862 31.705 27.086 33.233 33.766 34.854 31.302 32.606 32.69 346.970 1064.851 Well #19 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 33.746 33.746 103.566 Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #21 20.677 21.206 50.656 52.138 51.716 51.084 36.046 21.618 0.192 0.000 0.000 0.000 305.333 937.067 Well #22 52.03 53.454 59.625 71.562 65.866 69.225 69.046 62.689 63.742 58.597 47.868 66.868 740.572 2272.815 Well #25 50.864 48.704 56.956 59.606 55.062 54.606 56.544 47.61 49.439 43.874 41.906 33.157 598.328 1836.269 Well #26 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #27 3.457 0.000 5.391 12.934 12.257 12.987 9.142 11.169 12.811 12.313 12.596 11.788 116.845 358.597 Well #28 22.299 20.978 22.535 2.031 19.15 34.788 30.806 27.309 27.993 29.077 30.263 29.323 296.552 910.118 Well #29 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #31 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.297 17.349 25.49 43.136 132.384 Temescal Desalter 318.942 310.75 310.000 312.476 304.485 322.246 322.183 292.039 316.539 304.469 312.571 313.296 3739.996 11478.048 Lester WR-19 480.307 474.739 402.972 452.859 286.629 217.215 0.000 12.441 103.497 326.928 364.292 422.313 3544.192 10877.125 SDO WR-33 157.803 145.345 135.821 145.484 103.86 119.939 103.985 82.683 0.131 69.008 129.309 142.438 1335.801 4099.573 Mills WR-24 Note 1 154.394 137.017 105.783 18.372 26.519 4.132 86.717 189.584 83.731 43.359 39.017 20.042 908.667 2788.699 Arlington Desalter 0.000 0.002 0.000 0.000 0.000 0.000 31.17 26.706 63.693 41.37 0.000 0.000 162.941 500.066 Norco Conn. 0.004 0.002 0.004 0.003 0.002 0.002 1.821 6.051 0.003 0.004 0.004 0.001 7.901 24.248 Home Gardens County Water District 12.043 11.696 10.91 10.681 9.439 9.339 8.128 8.328 7.908 9.649 10.461 10.290 118.872 364.818 Note 1 WR-24 Meter was switched out, units went from CuFt to Kgal. Corrected production from 4/10/18-8/31/18.

ANNUAL PRODUCTION 2017/2018

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #7A 37.637 37.456 35.675 40.199 33.993 32.292 24.233 16.376 26.586 30.53 28.138 30.259 373.374 1145.885 Well #8A 50.155 50.347 47.889 47.006 45.503 45.986 47.155 37.298 19.852 39.767 45.311 43.749 520.018 1595.935 Well #9A 39.023 27.886 35.135 39.135 35.259 34.915 35.108 31.769 35.153 34.485 36.997 36.375 421.240 1292.786 Well #11A 25.575 21.311 20.290 20.76 20.650 21.081 20.51 17.687 20.42 19.429 20.49 19.099 247.302 758.970 Well #12A 21.223 26.403 25.712 26.121 21.916 18.933 20.233 18.413 17.929 20.003 23.164 24.398 264.448 811.591 Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #14 25.758 25.278 24.332 24.704 23.441 23.342 23.822 21.299 25.107 25.247 26.498 26.056 294.884 904.999 Well #15 29.664 8.189 0.000 0.000 25.956 33.766 35.149 33.059 39.006 38.999 39.829 38.139 321.756 987.469 Well #17A 23.454 17.635 17.043 24.878 22.209 27.357 23.68 21.991 30.054 30.811 28.898 23.992 292.002 896.154 Well #19 41.625 33.497 32.925 33.335 31.229 34.195 33.836 33.259 36.542 32.208 34.154 34.346 411.151 1261.822 Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #21 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #22 63.44 64.874 60.502 60.359 54.055 58.589 58.416 54.095 59.056 58.903 57.77 52.679 702.738 2156.703 Well #25 34.741 39.301 28.140 34.143 23.011 18.823 22.304 20.143 21.999 20.691 21.269 21.528 306.093 939.399 Well #26 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #27 11.865 11.989 11.826 11.743 11.603 11.805 11.174 3.388 0.000 0.000 0.000 0.000 85.393 262.071 Well #28 30.199 30.536 29.604 29.834 29.613 27.28 26.090 23.649 26.006 25.379 25.848 25.145 329.183 1010.263 Well #29 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #31 28.621 28.708 25.944 25.827 23.610 26.427 26.519 23.609 26.238 24.61 26.564 25.918 312.595 959.354 Well #33 - - - - - - - 7.944 27.566 30.166 25.425 21.465 112.566 345.465 Temescal Desalter 322.84 324.68 308.762 318.214 306.563 324.773 325.039 292.602 319.738 315.254 324.8 311.117 3794.379 11644.949 Lester WR-19 507.015 478.876 447.569 383.616 318.653 117.105 166.678 6.874 0.000 123.994 262.53 408.543 3221.454 9886.642 SDO WR-33 174.332 184.85 164.425 151.798 127.28 111.017 46.745 78.432 115.405 147.011 128.47 143.667 1573.431 4828.860 Mills WR-24 Note 1 67.263 119.978 72.53 0.000 0.000 0.000 0.130 0.000 23.602 135.444 0.000 5.052 423.999 1301.253 Arlington Desalter 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Norco Conn. 0.000 0.000 0.000 0.000 2.271 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.271 6.970 Home Gardens County Water District 13.530 12.48 10.828 10.459 8.968 7.802 11.113 9.862 7.981 9.342 9.422 10.390 122.177 374.961 Note 1 WR-24 Meter was switched out, units went from CuFt to Kgal. Corrected production from 4/10/18-8/31/18.

ANNUAL PRODUCTION 2018/2019

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #7A 36.806 33.903 37.877 43.963 42.902 34.754 37.927 29.558 31.811 24.394 28.268 3.794 385.957 1184.502 Well #8A 45.071 44.086 43.269 42.163 40.811 37.725 40.168 35.184 40.496 33.543 38.162 37.945 478.623 1468.894 Well #9A 25.020 35.425 36.565 39.659 38.778 39.719 35.054 30.019 39.619 33.512 30.26 37.897 421.527 1293.666 Well #11A 18.808 19.038 15.075 6.376 6.487 0.350 0.000 12.682 31.491 27.317 35.625 34.543 207.792 637.714 Well #12A 24.897 24.286 25.390 22.925 23.527 23.69 20.653 20.973 16.057 17.221 17.947 20.212 257.778 791.121 Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #14 26.561 25.97 24.745 25.787 24.82 25.319 25.935 24.869 27.284 25.368 29.044 28.868 314.570 965.415 Well #15 38.255 37.197 34.519 34.156 33.253 31.844 35.896 33.789 36.754 33.099 33.606 37.044 419.412 1287.175 Well #17A 2.484 0.000 0.000 11.607 3.946 25.722 25.497 20.299 20.542 19.609 22.583 31.847 184.136 565.113 Well #19 34.906 36.542 36.516 41.460 36.666 25.466 38.418 36.395 34.414 26.235 32.742 36.696 416.456 1278.103 Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #21 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #22 54.153 59.967 54.402 51.337 54.829 58.397 57.764 47.016 53.116 51.658 57.668 42.632 642.939 1973.180 Well #25 21.767 22.288 21.391 22.007 21.566 23.896 22.265 20.85 22.237 19.706 20.947 20.718 259.638 796.829 Well #26 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #27 0.000 0.000 9.743 28.264 26.219 25.168 24.408 22.028 22.466 18.764 15.371 20.342 212.773 653.000 Well #28 26.027 19.082 25.334 26.416 25.875 27.187 26.726 25.144 24.815 23.292 23.924 24.754 298.576 916.330 Well #29 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #31 27.247 27.096 26.747 28.527 28.028 28.558 26.816 22.281 25.265 23.813 25.145 26.476 315.999 969.801 Well #33 45.366 49.423 57.153 59.809 50.429 40.339 44.634 38.838 41.000 33.342 32.642 49.708 542.683 1665.494 Temescal Desalter 322.102 325.324 324.996 340.32 320.477 324.691 328.5 289.473 314.004 280.246 295.559 310.32 3776.012 11588.581 Lester WR-19 498.125 509.06 468.469 397.0 264.246 29.649 0.000 7.022 25.110 145.076 418.134 447.454 3209.345 9849.480 SDO WR-33 164.927 167.944 147.873 134.384 116.07 90.014 164.341 174.360 118.802 117.808 188.121 191.269 1775.915 5450.283 Mills WR-24 41.926 101.932 35.639 7.675 0.016 0.009 48.639 123.004 42.138 0.071 0.078 2.660 403.787 1239.222 Arlington Desalter 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Norco Conn. 9.824 35.741 13.161 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 4.697 63.423 194.645 Home Gardens County Water District 11.834 12.063 11.124 11.274 9.185 7.975 8.056 8.016 7.705 8.616 10.814 11.363 118.025 362.219 ANNUAL PRODUCTION 2019/2020

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #7A 26.716 18.217 29.389 26.656 25.985 31.521 30.72 189.204 580.667 Well #8A 40.079 28.992 32.866 37.417 36.345 37.027 35.719 248.445 762.478 Well #9A 35.725 14.724 37.767 42.681 41.738 43.018 37.471 253.124 776.838 Well #11A 35.595 35.515 33.973 35.695 34.593 35.105 35.524 246.000 754.974 Well #12A 21.409 13.552 18.49 18.254 19.538 19.715 20.057 131.015 402.085 Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #14 29.624 29.095 25.200 28.841 27.291 27.322 26.747 194.120 595.754 Well #15 37.371 28.185 31.583 26.416 35.978 37.404 37.412 234.349 719.217 Well #17A 30.173 21.268 21.099 17.931 21.708 16.92 27.198 156.297 479.675 Well #19 35.885 28.798 33.563 38.117 38.187 38.418 33.322 246.290 755.864 Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #21 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #22 61.797 39.023 51.807 58.408 60.137 43.525 56.582 371.279 1139.455 Well #25 21.155 15.023 18.926 15.339 22.963 24.865 23.257 141.528 434.349 Well #26 0.000 0.000 0.000 0.000 0.000 4.221 0.000 4.221 12.954 Well #27 21.048 20.398 15.841 18.003 19.29 19.761 19.264 133.605 410.034 Well #28 22.412 16.486 19.149 13.933 21.281 22.222 23.903 139.386 427.776 Well #29 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Well #31 25.535 16.986 24.604 20.450 25.175 10.019 0.000 122.769 376.778 Well #33 39.749 24.664 33.773 38.518 44.984 48.187 58.076 287.951 883.722 Temescal Desalter 320.172 212.105 275.129 285.34 313.695 305.829 317.355 2029.625 6228.919 Lester WR-19 498.987 534.174 458.989 440.3 237.011 258.397 145.112 2572.941 7896.356 SDO WR-33 203.461 205.789 192.018 182.957 134.11 111.885 110.118 1140.341 3499.707 Mills WR-24 4.29 126.267 46.83 4.853 0.078 1.400 0.080 183.798 564.076 Arlington Desalter 0.010 0.000 0.000 2.382 8.439 0.000 0.000 10.831 33.240 Norco Conn. 1.945 10.850 0.000 0.001 0.000 0.000 0.000 12.796 39.271 Home Gardens County Water District 12.882 12.572 12.202 10.921 9.339 9.620 9.058 76.594 235.067 ANNUAL PRODUCTION 2020/2021

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #7A 22.262 25.595 30.960 24.194 23.613 27.096 26.506 25.836 39.818 41.901 39.669 35.334 362.784 1113.384Well #8A 28.614 27.861 24.920 26.215 25.082 23.973 22.31 13.246 0.000 0.000 0.000 0.000 192.221 589.926Well #11A 34.774 34.874 33.733 35.044 33.322 19.099 22.992 30.22 29.689 18.158 23.042 22.262 337.209 1034.894Well #12A 25.987 25.614 25.215 22.289 20.332 10.791 15.999 19.447 21.501 13.347 20.739 20.310 241.571 741.381Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #14 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #15 35.698 34.753 32.996 32.54 31.026 31.042 30.702 27.958 29.578 29.503 29.381 26.267 371.444 1139.962Well #17A 34.965 26.390 23.420 19.428 22.471 25.699 25.860 27.656 35.140 36.823 30.193 20.912 328.957 1009.569Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #21 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #27 17.648 17.614 16.771 16.917 15.969 15.897 3.868 0.000 0.000 0.000 0.000 0.000 104.684 321.275Well #33 58.897 61.961 58.617 42.882 44.353 42.682 45.524 42.151 45.925 42.511 39.309 0.000 524.812 1610.648Mo. Sub-total Wells 258.845 254.662 246.632 219.509 216.168 196.279 193.761 186.514 201.651 182.243 182.333 125.085 2,463.68 7,561.04SARI MG - Note 3 50.749 52.337 50.185 51.424 53.691 55.688 55.476 50.506 52.957 50.743 53.084 49.332 626.172 1921.722Well #9A - Note 1 37.168 30.498 32.1 30.957 31.65 32.393 32.431 28.858 30.429 29.395 30.322 36.201 382.402 1173.592Well #19 - Note 1 36.295 33.043 35.864 38.078 36.575 33.933 26.626 24.174 25.905 25.825 22.422 26.096 364.836 1119.682Well #22 - Note 1 53.213 47.891 36.865 40.4 42.217 46.24 47.569 43.896 51.524 55.752 51.953 57.002 574.522 1763.208Well #25 - Note 1 16.622 17.927 17.882 17.378 17.266 17.571 17.583 9.988 0.000 0.000 0.000 0.000 132.217 405.774Well #26 - Note 1 17.176 17.097 16.396 16.336 16.126 16.336 16.416 14.504 15.135 15.264 11.362 10.350 182.498 560.086 Well #28 - Note 1 22.021 22.052 20.339 17.407 17.267 17.718 17.807 16.126 17.587 17.187 16.916 21.011 223.438 685.731Well #29 - Note 1 0.000 0.000 0.000 32.741 32.324 28.827 26.595 26.452 31.682 30.643 26.786 28.557 264.607 812.079Well #31 - Note 1 8.778 47.777 45.845 42.091 42.221 42.531 39.729 38.628 45.334 45.024 43.532 41.040 482.530 1480.885CWF 19 120.98 120.18 117.54 91.13 92.9 94.84 95.54 87.37 97.31 97.54 88.57 46.14 1150.040 3529.473CWF 22 42.121 28.718 29.358 26.586 26.326 33.883 45.044 42.411 38.758 37.517 74.112 70.249 495.083 1519.410Temescal Desalter 310.438 319.613 308.391 307.336 310.422 318.125 318.648 290.188 308.539 309.211 319.32 292.734 3712.965 11395.090Mo.Total Wells (incl. T.D.) 569.283 574.275 555.023 526.845 526.590 514.404 512.409 476.702 510.190 491.454 501.653 417.819 6,176.65 18,956.13Riverside Connection 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Lester WR-19 507.347 492.8 454.036 344.711 287.603 143.484 261.001 327.798 302.676 356.334 446.525 498.814 4423.129 13574.583SDO WR-33 191.243 181.288 169.049 140.345 127.337 83.954 0.000 0.000 125.324 128.829 147.824 161.72 1456.913 4471.266Lee Lk Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Mills WR-24 28.01 43.280 2.764 0.360 2.519 0.890 3.187 2.788 3.776 1.641 5.655 21.806 116.676 358.079Arlington Desalter 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Mo. Total Purch.Water 726.600 717.368 625.849 485.416 417.459 228.328 264.188 330.586 431.776 486.804 600.004 682.340 5,996.718 18,403.93Norco Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Home Gardens County Water Dis 12.652 11.992 12.152 10.59 10.09 8.408 9.009 9.870 10.130 10.340 10.880 11.502 127.615 391.650 Total Production - Note 2 1132.782 1142.745 1033.974 894.545 824.823 614.009 636.013 677.507 805.898 843.201 938.975 983.770 10528.242 32311.175 Total System - Note 4 1120.130 1130.753 1021.822 883.955 814.733 605.601 627.004 667.637 795.768 832.861 928.095 972.268 10400.627 31919.524Daily Average Production 36.13 36.48 34.06 28.51 27.16 19.54 20.23 23.84 25.67 27.76 29.94 32.41 28.49 87.45Purchased Water 65% 63% 61% 55% 51% 38% 42% 50% 54% 58% 65% 70% 58% 58%Note 1 Production shown only for ground extraction purposes, not added to production totalsNote 2 Total Production = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 (rev. 5/13)Note 3 Concentrate flow to SARI lineNote 4 Total System = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 - Norco Connection - Home Gardens ANNUAL PRODUCTION 2021/2022

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #7A 40.620 35.685 32.001 30.290 28.998 31.04 30.83 25.996 24.474 22.021 23.373 25.895 351.223 1077.903Well #8A 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.782 20.815 20.786 23.091 23.863 100.337 307.934Well #11A 24.754 25.435 25.995 23.033 25.464 26.406 24.304 20.970 22.142 18.808 19.88 17.837 275.028 844.061Well #12A 21.779 21.597 20.044 20.468 22.81 21.02 19.537 19.386 18.315 19.303 22.087 21.487 247.833 760.599Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #14 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #15 27.489 26.762 24.192 27.124 26.34 28.038 28.997 28.010 31.89 32.988 32.428 33.062 347.320 1065.925Well #17A 29.793 29.502 28.163 28.381 26.665 28.003 27.727 13.661 25.711 19.506 19.729 25.665 302.506 928.391Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #21 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #27 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #33 23.413 39.478 37.907 40.169 38.077 40.07 35.814 28.588 26.786 28.408 2.703 0.000 341.413 1047.796Mo. Sub-total Wells 167.848 178.459 168.302 169.465 168.354 174.577 167.209 148.393 170.133 161.820 143.291 147.809 1,965.66 6,032.61SARI MG - Note 3 53.989 53.79 50.398 54.207 51.514 53.899 53.585 48.301 53.686 50.517 52.285 55.451 631.622 1938.448Well #9A - Note 1 35.118 29.56 28.418 27.959 22.783 21.387 21.074 23.028 21.513 17.276 27.92 25.81 301.846 926.365Well #19 - Note 1 24.143 22.242 19.699 22.132 21.211 21.951 21.961 20.260 22.072 24.173 28.658 22.172 270.674 830.699Well #22 - Note 1 54.58 51.64 57.373 53.496 53.555 57.959 57.207 54.014 58.984 53.672 61.602 62.763 676.845 2077.237Well #25 - Note 1 0.000 0.000 0.000 48.471 48.771 53.164 52.781 42.049 41.804 38.373 44.082 48.221 417.716 1281.970Well #26 - Note 1 11.080 11.061 10.030 11.031 10.59 11.001 10.961 9.939 10.991 10.680 11.301 4.745 123.410 378.745Well #28 - Note 1 19.208 17.978 15.725 17.637 17.778 17.467 17.307 17.807 17.337 12.452 21.771 17.297 209.764 643.766Well #29 - Note 1 27.777 26.466 24.614 22.482 21.180 21.922 21.941 21.641 22.082 20.900 28.428 22.062 281.495 863.908Well #31 - Note 1 43.303 44.143 41.300 32.181 37.187 43.762 43.993 37.387 42.922 38.887 3.864 43.182 452.111 1387.529CWF 19 77.000 85.21 77.23 73.31 77.07 86.43 85.160 71.95 90.27 85.49 65.62 71.14 945.880 2902.906CWF 22 74.683 74.422 64.633 57.847 37.386 31.13 30.821 27.807 31.861 32.632 43.592 41.901 548.715 1684.006Temescal Desalter 320.133 316.094 294.976 318.899 301.937 318.243 315.578 282.843 312.461 290.703 292.412 310.301 3674.580 11277.286Mo.Total Wells (incl. T.D.) 487.981 494.553 463.278 488.364 470.291 492.820 482.787 431.236 482.594 452.523 435.703 458.110 5,640.24 17,309.90Riverside Connection 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Lester WR-19 523.094 524.791 414.295 325.370 213.103 193.632 6.196 10.442 7.758 153.635 267.15 299.134 2938.600 9018.563SDO WR-33 207.931 209.062 186.875 179.403 125.968 45.772 116.553 145.618 67.412 153.761 164.326 172.829 1775.510 5449.040Lee Lk Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Mills WR-24 10.071 26.321 52.313 8.264 2.190 0.430 1.981 73.245 49.38 19.494 19.922 15.157 278.768 855.539Arlington Desalter 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.120 0.000 0.000 0.000 0.000 0.120 0.368Mo. Total Purch.Water 741.096 760.174 653.483 513.037 341.261 239.834 124.730 229.425 124.550 326.890 451.398 487.120 4,992.998 15,323.51Norco Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Home Gardens County Water District 12.262 12.612 11.261 10.42 8.989 8.678 7.678 7.757 8.178 8.979 9.379 10.100 116.293 356.903Total Production - Note 2 1077.394 1095.095 974.898 870.244 697.096 615.094 491.536 560.904 485.013 661.291 777.889 832.189 9138.643 28046.495Total System - Note 4 1065.132 1082.483 963.637 859.824 688.107 606.416 483.858 553.147 476.835 652.312 768.510 822.089 9022.350 27689.592Daily Average Production 34.36 34.92 32.12 27.74 22.94 19.56 15.61 19.76 15.38 21.74 24.79 27.40 24.72 75.86Purchased Water 70% 70% 68% 60% 50% 40% 26% 41% 26% 50% 59% 59% 55% 55%Note 1 Production shown only for ground extraction purposes, not added to production totalsNote 2 Total Production = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 (rev. 5/13)Note 3 Concentrate flow to SARI lineNote 4 Total System = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 - Norco Connection - Home Gardens ANNUAL PRODUCTION 2022/2023

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #7A 22.992 26.837 36.055 23.483 7.007 14.113 27.037 25.795 28.478 29.218 30.41 27.947 299.372 918.773Well #8A 43.645 53.938 50.293 52.094 50.057 37.677 30.606 27.961 26.036 25.044 21.812 20.281 439.444 1348.654Well #11A 22.242 23.613 24.754 25.395 24.283 24.394 18.548 14.094 19.559 25.185 21.711 23.973 267.751 821.728Well #12A 22.535 23.183 18.766 19.312 23.264 23.87 22.349 18.504 26.605 25.433 20.185 21.573 265.579 815.062Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #14 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #15 32.86 31.303 0.715 0.000 0.000 0.000 0.000 1.399 20.536 21.478 18.604 18.503 145.398 446.226Well #17A 22.242 7.757 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 25.545 21.171 76.715 235.438Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #21 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #27 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #33 0.000 14.724 25.675 26.066 25.465 22.662 22.662 21.24 26.176 28.398 29.809 32.401 275.278 844.828Mo. Sub-total Wells 166.516 181.355 156.258 146.350 130.076 122.716 121.202 108.993 147.390 154.756 168.076 165.849 1,769.54 5,430.71SARI MG - Note 3 56.773 56.154 53.041 53.442 50.395 52.584 56.215 49.626 50.279 53.357 54.22 49.836 635.922 1951.645Well #9A - Note 1 22.266 24.043 25.185 26.543 34.619 28.37 36.875 33.779 26.68 29.082 22.9 19.922 330.264 1013.580Well #19 - Note 1 24.714 24.794 27.337 33.933 29.088 26.266 35.054 29.069 24.123 23.693 24.494 20.390 322.955 991.149Well #22 - Note 1 48.702 57.441 63.955 49.073 57.978 63.809 63.496 55.654 58.301 57.812 50.85 48.848 675.919 2074.395Well #25 - Note 1 46.792 50.937 49.940 50.297 52.574 37.163 41.075 36.941 44.374 45.910 44.261 39.856 540.120 1657.628Well #26 - Note 1 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #28 - Note 1 17.507 17.417 17.067 21.331 27.346 28.398 28.858 25.755 26.767 27.677 24.624 23.042 285.789 877.086Well #29 - Note 1 23.282 22.472 25.575 26.416 16.606 18.138 30.079 27.377 22.432 19.989 23.123 20.330 275.819 846.489Well #31 - Note 1 39.028 39.169 42.511 43.513 45.043 45.605 44.503 35.835 35.635 38.498 39.779 34.693 483.812 1484.819CWF 19 84.800 88.79 98.02 80.24 24.76 50.24 74.490 71.92 74.87 77.88 101.08 95.63 922.720 2831.828CWF 22 43.522 40.48 1.041 5.555 47.096 45.975 11.461 1.252 22.371 24.995 29.378 26.717 299.843 920.218Temescal Desalter 303.089 316.579 303.785 292.703 285.5 296.172 317.148 274.899 287.890 299.258 312.641 285.789 3575.453 10973.065Mo.Total Wells (incl. T.D.) 469.605 497.934 460.043 439.053 415.576 418.888 438.350 383.892 435.280 454.014 480.717 451.638 5,344.99 16,403.77Riverside Connection 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Lester WR-19 352.292 398.732 366.634 354.697 285.53 226.147 214.951 137.372 44.911 95.861 318.736 407.924 3203.787 9832.422SDO WR-33 188.643 175.34 167.276 160.031 143.846 127.088 0.000 0.000 157.788 180.688 171.283 181.314 1653.297 5073.968Lee Lk Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Mills WR-24 156.691 53.604 0.739 5.288 0.463 8.009 0.155 2.562 0.275 0.141 0.093 0.074 228.094 700.020Arlington Desalter 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Mo. Total Purch.Water 697.626 627.676 534.649 520.016 429.839 361.244 215.106 139.934 202.974 276.690 490.112 589.312 5,085.178 15,606.41Norco Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Home Gardens County Water District 11.751 11.021 10.09 10.03 9.469 8.939 7.918 6.966 7.328 9.739 10.220 10.390 113.861 349.439Total Production - Note 2 1038.909 996.340 895.631 873.274 773.559 683.917 567.505 450.654 541.013 627.829 840.371 918.603 9207.605 28258.140Total System - Note 4 1027.158 985.319 885.541 863.244 764.090 674.978 559.587 443.688 533.685 618.090 830.151 908.213 9093.744 27908.700Daily Average Production 33.13 31.78 29.52 27.85 25.47 21.77 18.05 15.85 17.22 20.60 26.78 30.27 24.91 76.46Purchased Water 68% 64% 60% 60% 56% 54% 38% 32% 38% 45% 59% 65% 56% 56%Note 1 Production shown only for ground extraction purposes, not added to production totalsNote 2 Total Production = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 (rev. 5/13)Note 3 Concentrate flow to SARI lineNote 4 Total System = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 - Norco Connection - Home Gardens ANNUAL PRODUCTION 2023/2024

RECAPITULATION
Fiscal Year
Annual Totals
July August September October November December January February March April May June

MG MG MG MG MG MG MG MG MG MG MG MG MG A/F
Well #3 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #7A 10.400 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 10.400 31.918Well #8A 10.331 39.156 36.181 38.518 30.418 26.166 52.356 37.319 18.323 0.000 0.000 0.000 288.768 886.229Well #11A 10.370 29.189 26.696 25.555 22.572 22.162 22.011 20.54 22.272 21.541 22.472 21.601 266.981 819.365Well #12A 10.049 30.548 27.475 27.328 25.708 28.449 30.013 28.785 32.357 30.766 30.952 29.174 331.604 1017.693Well #13 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #14 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #15 8.201 28.2 28.682 28.998 29.063 29.937 29.968 27.605 30.275 29.649 32.444 31.078 334.100 1025.353Well #17A 7.467 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.172 35.765 34.754 35.869 126.027 386.777Well #20 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #21 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #27 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Well #33 15.005 44.584 41.53 43.523 32.992 24.213 12.923 37.677 32.591 36.346 26.696 34.494 382.574 1174.120Mo. Sub-total Wells 71.823 171.677 160.564 163.922 140.753 130.927 147.271 151.926 147.990 154.067 147.318 152.216 1,740.45 5,341.45SARI MG - Note 3 22.591 54.725 50.407 53.597 45.94 45.838 53.739 49.395 54.047 50.205 54.555 51.718 586.757 1800.757Well #9A - Note 1 10.137 40.185 34.951 37.764 38.037 35.488 38.448 41.464 47.159 45.322 45.664 48.008 462.627 1419.802Well #19 - Note 1 9.990 40.139 34.984 37.096 37.317 35.734 39.389 37.476 41.070 36.405 39.502 38.857 427.959 1313.406Well #22 - Note 1 25.029 64.512 64.179 61.788 52.334 55.839 63.985 60.986 71.338 69.336 69.912 67.09 726.328 2229.101Well #25 - Note 1 19.306 55.917 45.860 51.450 35.873 40.237 49.454 47.838 52.756 52.708 53.470 52.255 557.124 1709.814Well #26 - Note 1 0.000 8.638 13.904 15.125 13.423 15.105 14.914 2.643 0.000 0.000 0.000 0.000 83.752 257.035Well #28 - Note 1 10.700 24.594 31.892 30.109 11.451 0.000 0.000 0.000 0.000 2.272 34.824 25.345 171.187 525.373Well #29 - Note 1 9.719 31.361 29.559 30.259 26.996 30.110 28.478 26.936 29.128 25.805 27.307 27.167 322.825 990.750Well #31 - Note 1 16.857 44.323 36.335 39.149 28.237 25.475 39.639 38.217 37.106 26.196 15.595 0.000 347.129 1065.339CWF 19 35.040 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 35.040 107.538CWF 22 13.583 56.755 43.633 52.471 59.428 60.409 77.665 70.75 79.567 77.215 75.594 77.486 744.556 2285.042Temescal Desalter 129.906 310.57 283.289 300.258 256.258 251.562 298.750 276.336 305.532 285.851 307.75 286.742 3292.804 10105.615Mo.Total Wells (incl. T.D.) 201.729 482.247 443.853 464.180 397.011 382.489 446.021 428.262 453.522 439.918 455.068 438.958 5,033.26 15,447.07Riverside Connection 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Lester WR-19 522.99 443.538 406.674 343.383 299.08 380.449 233.411 109.890 123.285 264.011 349.373 427.062 3903.146 11978.755SDO WR-33 225.667 239.179 205.992 179.411 161.816 72.100 127.219 95.755 118.363 145.784 156.481 159.786 1887.553 5792.900Lee Lk Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Mills WR-24 181.28 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2.996 184.276 565.543Arlington Desalter 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Mo. Total Purch.Water 929.937 682.717 612.666 522.794 460.896 452.549 360.630 205.645 241.648 409.795 505.854 589.844 5,974.975 18,337.20Norco Conn. 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000Home Gardens County Water District 12.192 12.142 10.951 10.51 9.499 8.739 8.948 7.468 8.558 9.459 10.190 10.290 118.946 365.045Total Production - Note 2 1083.043 1108.209 1012.886 934.503 798.479 774.629 728.986 563.157 615.603 772.498 885.328 951.316 10228.637 31391.687Total System - Note 4 1070.851 1096.067 1001.935 923.993 788.980 765.890 720.038 555.689 607.045 763.039 875.138 941.026 10109.691 31026.642Daily Average Production 34.54 35.36 33.40 29.81 26.30 24.71 23.23 19.85 19.58 25.43 28.23 31.37 27.70 85.00Purchased Water 87% 62% 61% 57% 58% 59% 50% 37% 40% 54% 58% 63% 59% 59%Note 1 Production shown only for ground extraction purposes, not added to production totalsNote 2 Total Production = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 (rev. 5/13)Note 3 Concentrate flow to SARI lineNote 4 Total System = Monthly Total Wells (incl. T.D.) + Mo. Total Purchased Water - CWF 19 - CWF 22 - Norco Connection - Home Gardens ANNUAL PRODUCTION 2024/2025

RECAPITULATION
Fiscal Year
Annual Totals

Appendix E
Water Audits

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: 7 5,628.983 MG/Yr 9 MG/Yr
Water imported: 8 4,040.420 MG/Yr 8 MG/Yr
Water exported: 7 175.362 MG/Yr 7 MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 9,494.041 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 6 8,471.394 MG/Yr
Billed unmetered: 0.000 MG/Yr
Unbilled metered: 0.000 MG/Yr Pcnt: Value:

Unbilled unmetered: 118.676 MG/Yr 1.25% 24061 MG/Yr
AUTHORIZED CONSUMPTION: 8,590.070 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 903.971 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 23.735 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 5 0.000 MG/Yr MG/Yr
Systematic data handling errors: 21.178 MG/Yr 0.25% MG/Yr Apparent Losses: 44.914 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 859.058 MG/Yr WATER LOSSES: 903.971 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 1,022.647 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 658.0 miles
Number of active AND inactive service connections: 6 42,125 Service connection density: 64 conn./mile main
Yes
Average length of customer service line: 9 30.0 ft
Average operating pressure: 10 75.0 psi

COST DATA
Total annual cost of operating water system: 10 $47,763,070 $/Year Customer retail unit cost (applied to Apparent Losses): 10 $3.82 Variable production cost (applied to Real Losses): 8 $1,828.00 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Billed metered
3: Customer metering inaccuracies
Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed 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
Default option selected for Unbilled unmetered - a grading of 5 is applied but not displayed 15/16 7/2015 - 6/2016
City of Corona Department of Water and Power
<----------- Enter grading in column 'E' and 'J' ----------> Based on the information provided, audit accuracy can be improved by addressing the following components:
$/100 cubic feet (ccf)
Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed *** YOUR SCORE IS: 73 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 ?
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? Click to access definition
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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 ?
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(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
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?
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+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.
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+
+
+
+
+
+
+
+
+
+
+
+
+ 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 Worksheet 2 Water Audit Report for: City of Corona Department of Water and Power Reporting Year:

System Attributes:

Apparent Losses: 44.914 MG/Yr
+ Real Losses: 859.058 MG/Yr
= Water Losses: 903.971 MG/Yr
Unavoidable Annual Real Losses (UARL): 270.42 MG/Yr
Annual cost of Apparent Losses: $229,356
Annual cost of Real Losses: $1,570,358 Valued at Variable Production Cost Performance Indicators:

Non-revenue water as percent by volume of Water Supplied: 10.8% Non-revenue water as percent by cost of operating system: 4.2% Real Losses valued at Variable Production Cost Apparent Losses per service connection per day: 2.92 gallons/connection/day Real Losses per service connection per day: 55.87 gallons/connection/day Real Losses per length of main per day*: N/A
Real Losses per service connection per day per psi pressure: 0.74 gallons/connection/day/psi From Above, Real Losses = Current Annual Real Losses (CARL): 859.06 million gallons/year

3.18 * This performance indicator applies for systems with a low service connection density of less than 32 service connections/mile of pipeline AWWA Free Water Audit Software:

System Attributes and Performance Indicators
*** YOUR WATER AUDIT DATA VALIDITY SCORE IS: 73 out of 100 *** Infrastructure Leakage Index (ILI) [CARL/UARL]:
15/16 7/2015 - 6/2016
Return to Reporting Worksheet to change this assumpiton ?
?
American Water Works Association.

WAS v5.0
Financial:

Operational Efficiency:

AWWA Free Water Audit Software v5.0 Performance Indicators 3 5 Name of Contact Person: All audit data are entered on the Reporting Worksheet Email Address: Value can be entered by user
Telephone | Ext.: 951-817-5762 Value calculated based on input data Name of City / Utility: These cells contain recommended default values City/Town/Municipality:

State / Province: Pcnt: Value:

Country: 0.25%
Year: 15/16 Financial Year
Start Date: 07/2015 Enter MM/YYYY numeric format
End Date: 06/2016 Enter MM/YYYY numeric format
Audit Preparation Date:

Volume Reporting Units:

PWSID / Other ID:

If you have questions or comments regarding the software please contact us via email at: [email protected] AWWA Free Water Audit Software v5.0
City of Corona Department of Water and Power
The following worksheets are available by clicking the buttons below or selecting the tabs along the bottom of the page Corona
[email protected]
Auditors are strongly encouraged to refer to the most current edition of AWWA M36 Manual for Water Audits for detailed guidance on the water auditing process and targetting loss reduction levels This spreadsheet-based water audit tool is designed to help quantify and track water losses associated with water distribution systems and identify areas for improved efficiency and cost recovery. It provides a "top-down" summary water audit format, and is not meant to take the place of a full-scale, comprehensive water audit format.

US
Use of Option
(Radio) Buttons:

The spreadsheet contains several separate worksheets. Sheets can be accessed using the tabs towards the bottom of the screen, or by clicking the buttons below.

Melinda Weinrich
Million gallons (US)
Please begin by providing the following information The following guidance will help you complete the Audit California (CA)
American Water Works Association Copyright © 2014, All Rights Reserved.

Select the default percentage
by choosing the option button
on the left
To enter a value, choose
this button and enter a
value in the cell to the right
Instructions
The current sheet.

Enter contact
information and basic
audit details (year,
units etc)
Performance
Indicators
Review the
performance indicators
to evaluate the results
of the audit
Comments
Enter comments to
explain how values
were calculated or to
document data
sources
Water Balance
The values entered in
the Reporting
Worksheet are used to
populate the Water
Balance
Dashboard
A graphical summary
of the water balance
and Non-Revenue
Water components
Grading Matrix
Presents the possible
grading options for
each input component
of the audit
Service Connection
Diagram
Diagrams depicting
possible customer service
connection line
configurations
Acknowledgements
Acknowledgements for
the AWWA Free Water
Audit Software v5.0
Loss Control
Planning
Use this sheet to
interpret the results of
the audit validity score
and performance
indicators
Definitions
Use this sheet to
understand the terms
used in the audit
process
Example Audits
Reporting Worksheet
and Performance
Indicators examples
are shown for two
validated audits
Reporting Worksheet
Enter the required data
on this worksheet to
calculate the water
balance and data grading
AWWA Free Water Audit Software v5.0 Instructions 1
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Volume from own sources:

Select this grading only if
the water utility
purchases/imports all of its
water resources (i.e. has
no sources of its own)
Less than 25% of water production
sources are metered, remaining
sources are estimated. No regular
meter accuracy testing or electronic
calibration conducted.
25% - 50% of treated water
production sources are metered;
other sources estimated. No regular
meter accuracy testing or electronic
calibration conducted.

Conditions between
2 and 4
50% - 75% of treated water
production sources are metered,
other sources estimated. Occasional
meter accuracy testing or electronic
calibration conducted.

Conditions between
4 and 6
At least 75% of treated water
production sources are metered, or at
least 90% of the source flow is derived
from metered sources. Meter
accuracy testing and/or electronic
calibration of related instrumentation is
conducted annually. Less than 25% of
tested meters are found outside of +/-
6% accuracy.

Conditions between
6 and 8
100% of treated water production
sources are metered, meter accuracy
testing and electronic calibration of
related instrumentation is conducted
annually, less than 10% of meters are
found outside of +/- 6% accuracy
Conditions between
8 and 10
100% of treated water production
sources are metered, meter accuracy
testing and electronic calibration of
related instrumentation is conducted
semi-annually, with less than 10% found
outside of +/- 3% accuracy. Procedures
are reviewed by a third party
knowledgeable in the M36 methodology.

Improvements to attain higher
data grading for "Volume from
own Sources" component:
to qualify for 2:

Organize and launch efforts to
collect data for determining volume
from own sources
to maintain 10:

Standardize meter accuracy test
frequency to semi-annual, or more
frequent, for all meters. Repair or
replace meters outside of +/- 3%
accuracy. Continually investigate/pilot
improving metering technology.

Volume from own sources
master meter and supply error
adjustment:

Select n/a only if the water
utility fails to have meters
on its sources of supply
Inventory information on meters and
paper records of measured volumes
exist but are incomplete and/or in a
very crude condition; data error
cannot be determined
No automatic datalogging of
production volumes; daily readings
are scribed on paper records without
any accountability controls. Flows
are not balanced across the water
distribution system: tank/storage
elevation changes are not employed
in calculating the "Volume from own
sources" component and archived
flow data is adjusted only when
grossly evident data error occurs.

Conditions between
2 and 4
Production meter data is logged
automatically in electronic format and
reviewed at least on a monthly basis
with necessary corrections
implemented. "Volume from own
sources" tabulations include estimate
of daily changes in tanks/storage
facilities. Meter data is adjusted
when gross data errors occur, or
occasional meter testing deems this
necessary.

Conditions between
4 and 6
Hourly production meter data logged
automatically & reviewed on at least a
weekly basis. Data is adjusted to
correct gross error when
meter/instrumentation equipment
malfunction is detected; and/or error is
confirmed by meter accuracy testing.

Tank/storage facility elevation changes
are automatically used in calculating a
balanced "Volume from own sources"
component, and data gaps in the
archived data are corrected on at least
a weekly basis.

Conditions between
6 and 8
Continuous production meter data is
logged automatically & reviewed each
business day. Data is adjusted to
correct gross error from detected
meter/instrumentation equipment
malfunction and/or results of meter
accuracy testing. Tank/storage facility
elevation changes are automatically
used in "Volume from own sources"
tabulations and data gaps in the
archived data are corrected on a daily
basis.

Conditions between
8 and 10
Computerized system (SCADA or
similar) automatically balances flows
from all sources and storages; results
are reviewed each business day. Tight
accountability controls ensure that all
data gaps that occur in the archived flow
data are quickly detected and corrected.

Regular calibrations between SCADA
and sources meters ensures minimal
data transfer error.

Improvements to attain higher
data grading for "Master meter
and supply error adjustment"
component:
to qualify for 2:

Develop a plan to restructure
recordkeeping system to capture all
flow data; set a procedure to review
flow data on a daily basis to detect
input errors. Obtain more reliable
information about existing meters by
conducting field inspections of
meters and related instrumentation,
and obtaining manufacturer
literature.
to maintain 10:

Monitor meter innovations for
development of more accurate and less
expensive flowmeters. Continue to
replace or repair meters as they
perform outside of desired accuracy
limits. Stay abreast of new and more
accurate water level instruments to
better record tank/storage levels and
archive the variations in storage volume.

Keep current with SCADA and data
management systems to ensure that
archived data is well-managed and error
free.

Water Imported:

Select n/a if the water
utility's supply is
exclusively from its own
water resources (no bulk
purchased/ imported
water)
Less than 25% of imported water
sources are metered, remaining
sources are estimated. No regular
meter accuracy testing.
25% - 50% of imported water
sources are metered; other sources
estimated. No regular meter
accuracy testing.

Conditions between
2 and 4
50% - 75% of imported water
sources are metered, other sources
estimated. Occasional meter
accuracy testing conducted.

Conditions between
4 and 6
At least 75% of imported water
sources are metered, meter accuracy
testing and/or electronic calibration of
related instrumentation is conducted
annually for all meter installations.

Less than 25% of tested meters are
found outside of +/- 6% accuracy.

Conditions between
6 and 8
100% of imported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted annually,
less than 10% of meters are found
outside of +/- 6% accuracy
Conditions between
8 and 10
100% of imported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted semiannually for all meter installations, with less than 10% of accuracy tests found
outside of +/- 3% accuracy.

Improvements to attain higher
data grading for "Water
Imported Volume" component:
(Note: usually the water
supplier selling the water - "the
Exporter" - to the utility being
audited is responsible to
maintain the metering
installation measuring the
imported volume. The utility
should coordinate carefully
with the Exporter to ensure
that adequate meter upkeep
takes place and an accurate
measure of the Water
Imported volume is quantified.)
to qualify for 2:

Review bulk water purchase
agreements with partner suppliers;
confirm requirements for use and
maintenance of accurate metering.

Identify needs for new or
replacement meters with goal to
meter all imported water sources.
to maintain 10:

Standardize meter accuracy test
frequency to semi-annual, or more
frequent, for all meters. Continue to
conduct calibration of related
instrumentation on a semi-annual basis.

Repair or replace meters outside of +/-
3% accuracy. Continually
investigate/pilot improving metering
technology.
to qualify for 4:

Locate all water production sources on maps and in the
field, launch meter accuracy testing for existing meters, begin to install meters on unmetered water production
sources and replace any obsolete/defective meters.

To qualify for 4:

Locate all imported water sources on maps and in the field, launch meter accuracy testing for existing meters, begin to install meters on unmetered imported water
interconnections and replace obsolete/defective meters. to qualify for 6:

Formalize annual meter accuracy testing for all imported water meters, planning for both regular meter accuracy
testing and calibration of the related instrumentation.

Continue installation of meters on unmetered imported water interconnections and replacement of obsolete/defective
meters.

AWWA Free Water Audit Software: Grading Matrix
The grading assigned to each audit component and the corresponding recommended improvements and actions are highlighted in yellow. Audit accuracy is likely to be improved by prioritizing those items shown in red to qualify for 6:

Refine computerized data collection and archive to include hourly production meter data that is reviewed at least on a weekly basis to detect specific data anomalies and gaps.

Use daily net storage change to balance flows in calculating "Water Supplied" volume. Necessary corrections to data
errors are implemented on a weekly basis.
to qualify for 8:

Ensure that all flow data is collected and archived on at least an hourly basis. All data is reviewed and detected errors corrected each business day. Tank/storage levels variations are employed in calculating balanced "Water Supplied"
component. Adjust production meter data for gross error and inaccuracy confirmed by testing.
to qualify for 10:

Link all production and tank/storage facility elevation change data to a Supervisory Control & Data Acquisition (SCADA) System, or similar computerized monitoring/control system, and establish automatic flow balancing algorithm and regularly calibrate between SCADA and source meters. Data is
reviewed and corrected each business day.
to qualify for 6:

Formalize annual meter accuracy testing for all source
meters; specify the frequency of testing. Complete
installation of meters on unmetered water production sources and complete replacement of all obsolete/defective meters. to qualify for 8:

Conduct annual meter accuracy testing and calibration of related instrumentation on all meter installations on a regular basis. Complete project to install new, or replace defective existing, meters so that entire production meter population is metered. Repair or replace meters outside of +/- 6%
accuracy.
to qualify for 10:

Maintain annual meter accuracy testing and calibration of related instrumentation for all meter installations. Repair or replace meters outside of +/- 3% accuracy. Investigate new meter technology; pilot one or more replacements with
innovative meters in attempt to further improve meter
accuracy.
to qualify for 4:

Install automatic datalogging equipment on production
meters. Complete installation of level instrumentation at all tanks/storage facilities and include tank level data in automatic calculation routine in a computerized system.

Construct a computerized listing or spreadsheet to archive input volumes, tank/storage volume changes and
import/export flows in order to determine the composite "Water Supplied" volume for the distribution system. Set a procedure to review this data on a monthly basis to detect gross anomalies and data gaps.

WATER SUPPLIED
to qualify for 10:

Conduct meter accuracy testing for all meters on a semiannual basis, along with calibration of all related instrumentation. Repair or replace meters outside of +/- 3% accuracy. Investigate new meter technology; pilot one or more replacements with innovative meters in attempt to improve meter accuracy.
to qualify for 8:

Complete project to install new, or replace defective, meters on all imported water interconnections. Maintain annual meter accuracy testing for all imported water meters and conduct calibration of related instrumentation at least annually. Repair or replace meters outside of +/- 6%
accuracy.

WAS 5.0
American Water Works Association. Copyright © 2014, All Rights Reserved.

AWWA Free Water Audit Software v5.0 Grading Matrix 23
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Water imported master meter
and supply error adjustment:

Select n/a if the Imported
water supply is
unmetered, with Imported
water quantities estimated
on the billing invoices sent
by the Exporter to the
purchasing Utility.

Inventory information on imported
meters and paper records of
measured volumes exist but are
incomplete and/or in a very crude
condition; data error cannot be
determined Written agreement(s)
with water Exporter(s) are missing or
written in vague language
concerning meter management and
testing.

No automatic datalogging of
imported supply volumes; daily
readings are scribed on paper
records without any accountability
controls to confirm data accuracy
and the absence of errors and data
gaps in recorded volumes. Written
agreement requires meter accuracy
testing but is vague on the details of
how and who conducts the testing.

Conditions between
2 and 4
Imported supply metered flow data is
logged automatically in electronic
format and reviewed at least on a
monthly basis by the Exporter with
necessary corrections implemented.

Meter data is adjusted by the
Exporter when gross data errors are
detected. A coherent data trail exists
for this process to protect both the
selling and the purchasing Utility.

Written agreement exists and clearly
states requirements and roles for
meter accuracy testing and data
management.

Conditions between
4 and 6
Hourly Imported supply metered data
is logged automatically & reviewed on
at least a weekly basis by the Exporter.

Data is adjusted to correct gross error
when meter/instrumentation equipment
malfunction is detected; and to correct
for error confirmed by meter accuracy
testing. Any data gaps in the archived
data are detected and corrected during
the weekly review. A coherent data
trail exists for this process to protect
both the selling and the purchasing
Utility.

Conditions between
6 and 8
Continuous Imported supply metered
flow data is logged automatically &
reviewed each business day by the
Exporter. Data is adjusted to correct
gross error from detected
meter/instrumentation equipment
malfunction and/or results of meter
accuracy testing. Any data
errors/gaps are detected and
corrected on a daily basis. A data trail
exists for the process to protect both
the selling and the purchasing Utility.

Conditions between
8 and 10
Computerized system (SCADA or
similar) automatically records data
which is reviewed each business day by
the Exporter. Tight accountability
controls ensure that all error/data gaps
that occur in the archived flow data are
quickly detected and corrected. A
reliable data trail exists and contract
provisions for meter testing and data
management are reviewed by the selling
and purchasing Utility at least once
every five years.

Improvements to attain higher
data grading for "Water
imported master meter and
supply error adjustment"
component:
to qualify for 2:

Develop a plan to restructure
recordkeeping system to capture all
flow data; set a procedure to review
flow data on a daily basis to detect
input errors. Obtain more reliable
information about existing meters by
conducting field inspections of
meters and related instrumentation,
and obtaining manufacturer
literature. Review the written
agreement between the selling and
purchasing Utility.
to maintain 10:

Monitor meter innovations for
development of more accurate and less
expensive flowmeters; work with the
Exporter to help identify meter
replacement needs. Keep
communication lines with Exporters
open and maintain productive relations.

Keep the written agreement current with
clear and explicit language that meets
the ongoing needs of all parties.

Water Exported:

Select n/a if the water
utility sells no bulk water to
neighboring water utilities
(no exported water sales)
Less than 25% of exported water
sources are metered, remaining
sources are estimated. No regular
meter accuracy testing.
25% - 50% of exported water
sources are metered; other sources
estimated. No regular meter
accuracy testing.

Conditions between
2 and 4
50% - 75% of exported water
sources are metered, other sources
estimated. Occasional meter
accuracy testing conducted.

Conditions between
4 and 6
At least 75% of exported water sources
are metered, meter accuracy testing
and/or electronic calibration conducted
annually. Less than 25% of tested
meters are found outside of +/- 6%
accuracy.

Conditions between
6 and 8
100% of exported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted annually,
less than 10% of meters are found
outside of +/- 6% accuracy
Conditions between
8 and 10
100% of exported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted semiannually for all meter installations, with less than 10% of accuracy tests found
outside of +/- 3% accuracy.

Improvements to attain higher
data grading for "Water
Exported Volume" component:
(Note: usually, if the water
utility being audited sells
(Exports) water to a
neighboring purchasing Utility,
it is the responsibility of the
utility exporting the water to
maintain the metering
installation measuring the
Exported volume. The utility
exporting the water should
ensure that adequate meter
upkeep takes place and an
accurate measure of the
Water Exported volume is
quantified.)
to qualify for 2:

Review bulk water sales
agreements with purchasing utilities;
confirm requirements for use &
upkeep of accurate metering.

Identify needs to install new, or
replace defective meters as needed.
to maintain 10:

Standardize meter accuracy test
frequency to semi-annual, or more
frequent, for all meters. Repair or
replace meters outside of +/- 3%
accuracy. Continually investigate/pilot
improving metering technology.

Water exported master meter
and supply error adjustment:

Select n/a only if the water
utility fails to have meters
on its exported supply
interconnections.

Inventory information on exported
meters and paper records of
measured volumes exist but are
incomplete and/or in a very crude
condition; data error cannot be
determined Written agreement(s)
with the utility purchasing the water
are missing or written in vague
language concerning meter
management and testing.

No automatic datalogging of
exported supply volumes; daily
readings are scribed on paper
records without any accountability
controls to confirm data accuracy
and the absence of errors and data
gaps in recorded volumes. Written
agreement requires meter accuracy
testing but is vague on the details of
how and who conducts the testing.

Conditions between
2 and 4
Exported metered flow data is logged
automatically in electronic format and
reviewed at least on a monthly basis,
with necessary corrections
implemented. Meter data is adjusted
by the utility selling (exporting) the
water when gross data errors are
detected. A coherent data trail exists
for this process to protect both the
utility exporting the water and the
purchasing Utility. Written agreement
exists and clearly states requirements
and roles for meter accuracy testing
and data management.

Conditions between
4 and 6
Hourly exported supply metered data is
logged automatically & reviewed on at
least a weekly basis by the utility selling
the water. Data is adjusted to correct
gross error when
meter/instrumentation equipment
malfunction is detected; and to correct
for error found by meter accuracy
testing. Any data gaps in the archived
data are detected and corrected during
the weekly review. A coherent data
trail exists for this process to protect
both the selling (exporting) utility and
the purchasing Utility.

Conditions between
6 and 8
Continuous exported supply metered
flow data is logged automatically &
reviewed each business day by the
utility selling (exporting) the water.

Data is adjusted to correct gross error
from detected meter/instrumentation
equipment malfunction and any error
confirmed by meter accuracy testing.

Any data errors/gaps are detected and
corrected on a daily basis. A data trail
exists for the process to protect both
the selling (exporting) Utility and the
purchasing Utility.

Conditions between
8 and 10
Computerized system (SCADA or
similar) automatically records data
which is reviewed each business day by
the utility selling (exporting) the water.

Tight accountability controls ensure that
all error/data gaps that occur in the
archived flow data are quickly detected
and corrected. A reliable data trail
exists and contract provisions for meter
testing and data management are
reviewed by the selling Utility and
purchasing Utility at least once every
five years.
to qualify for 10:

Maintain annual meter accuracy testing for all meters. Repair or replace meters outside of +/- 3% accuracy. Investigate new meter technology; pilot one or more replacements with
innovative meters in attempt to improve meter accuracy. to qualify for 10:

Conduct accountability checks to confirm that all Imported supply metered data is reviewed and corrected each business day by the Exporter. Results of all meter accuracy tests and data corrections should be available for sharing between the Exporter and the purchasing Utility. Establish a schedule for a regular review and updating of the contractual language in the written agreement between the selling and the purchasing Utility; at least every five years.

To qualify for 4:

Locate all exported water sources on maps and in field, launch meter accuracy testing for existing meters, begin to install meters on unmetered exported water
interconnections and replace obsolete/defective meters
to qualify for 4:

Install automatic datalogging equipment on Imported
supply meters. Set a procedure to review this data on a monthly basis to detect gross anomalies and data gaps.

Launch discussions with the Exporters to jointly review terms of the written agreements regarding meter accuracy testing and data management; revise the terms as
necessary.
to qualify for 6:

Refine computerized data collection and archive to include hourly Imported supply metered flow data that is reviewed at least on a weekly basis to detect specific data anomalies and gaps. Make necessary corrections to errors/data errors on a weekly basis.
to qualify for 8:

Ensure that all Imported supply metered flow data is
collected and archived on at least an hourly basis. All data is reviewed and errors/data gaps are corrected each business day.
to qualify for 6:

Formalize annual meter accuracy testing for all exported water meters. Continue installation of meters on unmetered exported water interconnections and replacement of
obsolete/defective meters.
to qualify for 8:

Complete project to install new, or replace defective, meters on all exported water interconnections. Maintain annual meter accuracy testing for all exported water meters. Repair or replace meters outside of +/- 6% accuracy.

AWWA Free Water Audit Software v5.0 Grading Matrix 24
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Improvements to attain higher
data grading for "Water
exported master meter and
supply error adjustment"
component:
to qualify for 2:

Develop a plan to restructure
recordkeeping system to capture all
flow data; set a procedure to review
flow data on a daily basis to detect
input errors. Obtain more reliable
information about existing meters by
conducting field inspections of
meters and related instrumentation,
and obtaining manufacturer
literature. Review the written
agreement between the utility selling
(exporting) the water and the
purchasing Utility.
to maintain 10:

Monitor meter innovations for
development of more accurate and less
expensive flowmeters; work with the
purchasing utilities to help identify meter
replacement needs. Keep
communication lines with the purchasing
utilities open and maintain productive
relations. Keep the written agreement
current with clear and explicit language
that meets the ongoing needs of all
parties.

Billed metered:
n/a (not applicable). Select
n/a only if the entire
customer population is not
metered and is billed for
water service on a flat or
fixed rate basis. In such a
case the volume entered
must be zero.

Less than 50% of customers with
volume-based billings from meter
readings; flat or fixed rate billing
exists for the majority of the
customer population
At least 50% of customers with
volume-based billing from meter
reads; flat rate billing for others.

Manual meter reading is conducted,
with less than 50% meter read
success rate, remainding accounts'
consumption is estimated. Limited
meter records, no regular meter
testing or replacement. Billing data
maintained on paper records, with no
auditing.

Conditions between
2 and 4
At least 75% of customers with
volume-based, billing from meter
reads; flat or fixed rate billing for
remaining accounts. Manual meter
reading is conducted with at least
50% meter read success rate;
consumption for accounts with failed
reads is estimated. Purchase
records verify age of customer
meters; only very limited meter
accuracy testing is conducted.

Customer meters are replaced only
upon complete failure. Computerized
billing records exist, but only sporadic
internal auditing conducted.

Conditions between
4 and 6
At least 90% of customers with volumebased billing from meter reads; consumption for remaining accounts is
estimated. Manual customer meter
reading gives at least 80% customer
meter reading success rate;
consumption for accounts with failed
reads is estimated. Good customer
meter records eixst, but only limited
meter accuracy testing is conducted.

Regular replacement is conducted for
the oldest meters. Computerized
billing records exist with annual auditing
of summary statistics conducting by
utility personnel.

Conditions between
6 and 8
At least 97% of customers exist with
volume-based billing from meter
reads. At least 90% customer meter
reading success rate; or at least 80%
read success rate with planning and
budgeting for trials of Automatic Meter
Reading (AMR) or Advanced Metering
Infrastructure (AMI) in one or more
pilot areas. Good customer meter
records. Regular meter accuracy
testing guides replacement of
statistically significant number of
meters each year. Routine auditing of
computerized billing records for global
and detailed statistics occurs annually
by utility personnel, and is verified by
third party at least once every five
years.

Conditions between
8 and 10
At least 99% of customers exist with
volume-based billing from meter reads.

At least 95% customer meter reading
success rate; or minimum 80% meter
reading success rate, with Automatic
Meter Reading (AMR) or Advanced
Metering Infrastructure (AMI) trials
underway. Statistically significant
customer meter testing and
replacement program in place on a
continuous basis. Computerized billing
with routine, detailed auditing, including
field investigation of representative
sample of accounts undertaken annually
by utility personnel. Audit is conducted
by third party auditors at least once
every three years.

Improvements to attain higher
data grading for "Billed
Metered Consumption"
component:

If n/a is selected because
the customer meter
population is unmetered,
consider establishing a
new policy to meter the
customer population and
employ water rates based
upon metered volumes.
to qualify for 2:

Conduct investigations or trials of
customer meters to select
appropriate meter models. Budget
funding for meter installations.

Investigate volume based water rate
structures.
to maintain 10:

Continue annual internal billing data
auditing, and third party auditing at least
every three years. Continue customer
meter accuracy testing to ensure that
accurate customer meter readings are
obtained and entered as the basis for
volume based billing. Stay abreast of
improvements in Automatic Meter
Reading (AMR) and Advanced Metering
Infrastructure (AMI) and information
management. Plan and budget for
justified upgrades in metering, meter
reading and billing data management to
maintain very high accuracy in customer
metering and billing.

Billed unmetered:

Select n/a if it is the policy
of the water utility to meter
all customer connections
and it has been confirmed
by detailed auditing that all
customers do indeed have
a water meter; i.e. no
intentionally unmetered
accounts exist
Water utility policy does not require
customer metering; flat or fixed fee
billing is employed. No data is
collected on customer consumption.

The only estimates of customer
population consumption available
are derived from data estimation
methods using average fixture count
multiplied by number of connections,
or similar approach.

Water utility policy does not require
customer metering; flat or fixed fee
billing is employed. Some metered
accounts exist in parts of the system
(pilot areas or District Metered
Areas) with consumption read
periodically or recorded on portable
dataloggers over one, three, or
seven day periods. Data from these
sample meters are used to infer
consumption for the total customer
population. Site specific estimation
methods are used for unusual
buildings/water uses.

Conditions between
2 and 4
Water utility policy does require
metering and volume based billing in
general. However, a liberal amount
of exemptions and a lack of clearly
written and communicated
procedures result in up to 20% of
billed accounts believed to be
unmetered by exemption; or the
water utility is in transition to
becoming fully metered, and a large
number of customers remain
unmetered. A rough estimate of the
annual consumption for all unmetered
accounts is included in the annual
water audit, with no inspection of
individual unmetered accounts.

Conditions between
4 and 6
Water utility policy does require
metering and volume based billing but
established exemptions exist for a
portion of accounts such as municipal
buildings. As many as 15% of billed
accounts are unmetered due to this
exemption or meter installation
difficulties. Only a group estimate of
annual consumption for all unmetered
accounts is included in the annual
water audit, with no inspection of
individual unmetered accounts.

Conditions between
6 and 8
Water utility policy does require
metering and volume based billing for
all customer accounts. However, less
than 5% of billed accounts remain
unmetered because meter installation
is hindered by unusual circumstances.

The goal is to minimize the number of
unmetered accounts. Reliable
estimates of consumption are
obtained for these unmetered
accounts via site specific estimation
methods.

Conditions between
8 and 10
Water utility policy does require
metering and volume based billing for all
customer accounts. Less than 2% of
billed accounts are unmetered and exist
because meter installation is hindered
by unusual circumstances. The goal
exists to minimize the number of
unmetered accounts to the extent that is
economical. Reliable estimates of
consumption are obtained at these
accounts via site specific estimation
methods.
to qualify for 4:

Purchase and install meters on unmetered accounts.

Implement policies to improve meter reading success.

Catalog meter information during meter read visits to
identify age/model of existing meters. Test a minimal
number of meters for accuracy. Install computerized billing system.
to qualify for 6:

Purchase and install meters on unmetered accounts.

Eliminate flat fee billing and establish appropriate water rate structure based upon measured consumption. Continue to
achieve verifiable success in removing manual meter reading barriers. Expand meter accuracy testing. Launch regular meter replacement program. Launch a program of annual
auditing of global billing statistics by utility personnel. to qualify for 10:

Purchase and install meters on unmetered accounts. Launch Automatic Meter Reading (AMR) or Advanced Metering
Infrastructure (AMI) system trials if manual meter reading success rate of at least 99% is not achieved within a five-year program. Continue meter accuracy testing program. Conduct planning and budgeting for large scale meter replacement based upon meter life cycle analysis using cumulative flow target. Continue annual detailed billing data auditing by utility personnel and conduct third party auditing at least once every three years.
to qualify for 4:

Install automatic datalogging equipment on exported supply meters. Set a procedure to review this data on a monthly basis to detect gross anomalies and data gaps. Launch
discussions with the purchasing utilities to jointly review terms of the written agreements regarding meter accuracy testing and data management; revise the terms as
necessary.
to qualify for 8:

Purchase and install meters on unmetered accounts. If
customer meter reading success rate is less than 97%,
assess cost-effectiveness of Automatic Meter Reading
(AMR) or Advanced Metering Infrastructure (AMI) system for portion or entire system; or otherwise achieve ongoing
improvements in manual meter reading success rate to 97% or higher. Refine meter accuracy testing program. Set
meter replacement goals based upon accuracy test results.

Implement annual auditing of detailed billing records by utility personnel and implement third party auditing at least once every five years.

AUTHORIZED CONSUMPTION
to qualify for 10:

Conduct accountability checks to confirm that all exported metered flow data is reviewed and corrected each business day by the utility selling the water. Results of all meter accuracy tests and data corrections should be available for sharing between the utility and the purchasing Utility. Establish a schedule for a regular review and updating of the contractual language in the written agreements with the purchasing utilities; at least every five years.
to qualify for 6:

Refine computerized data collection and archive to include hourly exported supply metered flow data that is reviewed at least on a weekly basis to detect specific data anomalies and gaps. Make necessary corrections to errors/data errors on a weekly basis.
to qualify for 8:

Ensure that all exported metered flow data is collected and archived on at least an hourly basis. All data is reviewed and errors/data gaps are corrected each business day.

AWWA Free Water Audit Software v5.0 Grading Matrix 25
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Improvements to attain higher
data grading for "Billed
Unmetered Consumption"
component:
to qualify for 2:

Conduct research and evaluate
cost/benefit of a new water utility
policy to require metering of the
customer population; thereby greatly
reducing or eliminating unmetered
accounts. Conduct pilot metering
project by installing water meters in
small sample of customer accounts
and periodically reading the meters
or datalogging the water
consumption over one, three, or
seven day periods.
to maintain 10:

Continue to refine estimation methods
for unmetered consumption and explore
means to establish metering, for as
many billed remaining unmetered
accounts as is economically feasible.

Unbilled metered:
select n/a if all billingexempt consumption is
unmetered.

Billing practices exempt certain
accounts, such as municipal
buildings, but written policies do not
exist; and a reliable count of unbilled
metered accounts is unavailable.

Meter upkeep and meter reading on
these accounts is rare and not
considered a priority. Due to poor
recordkeeping and lack of auditing,
water consumption for all such
accounts is purely guesstimated.

Billing practices exempt certain
accounts, such as municipal
buildings, but only scattered, dated
written directives exist to justify this
practice. A reliable count of unbilled
metered accounts is unavailable.

Sporadic meter replacement and
meter reading occurs on an asneeded basis. The total annual water consumption for all unbilled, metered
accounts is estimated based upon
approximating the number of
accounts and assigning consumption
from actively billed accounts of same
meter size.

Conditions between
2 and 4
Dated written procedures permit
billing exemption for specific
accounts, such as municipal
properties, but are unclear regarding
certain other types of accounts.

Meter reading is given low priority and
is sporadic. Consumption is
quantified from meter readings where
available. The total number of
unbilled, unmetered accounts must
be estimated along with consumption
volumes.

Conditions between
4 and 6
Written policies regarding billing
exemptions exist but adherence in
practice is questionable. Metering and
meter reading for municipal buildings is
reliable but sporadic for other unbilled
metered accounts. Periodic auditing of
such accounts is conducted. Water
consumption is quantified directly from
meter readings where available, but
the majority of the consumption is
estimated.

Conditions between
6 and 8
Written policy identifies the types of
accounts granted a billing exemption.

Customer meter management and
meter reading are considered
secondary priorities, but meter reading
is conducted at least annually to obtain
consumption volumes for the annual
water audit. High level auditing of
billing records ensures that a reliable
census of such accounts exists.

Conditions between
8 and 10
Clearly written policy identifies the types
of accounts given a billing exemption,
with emphasis on keeping such
accounts to a minimum. Customer
meter management and meter reading
for these accounts is given proper
priority and is reliably conducted.

Regular auditing confirms this. Total
water consumption for these accounts is
taken from reliable readings from
accurate meters.

Improvements to attain higher
data grading for "Unbilled
Metered Consumption"
component:
to qualify for 2:

Reassess the water utility's policy
allowing certain accounts to be
granted a billing exemption. Draft an
outline of a new written policy for
billing exemptions, with clear
justification as to why any accounts
should be exempt from billing, and
with the intention to keep the
number of such accounts to a
minimum.
to maintain 10:

Reassess the utility's philosophy in
allowing any water uses to go "unbilled".

It is possible to meter and bill all
accounts, even if the fee charged for
water consumption is discounted or
waived. Metering and billing all
accounts ensures that water
consumption is tracked and water waste
from plumbing leaks is detected and
minimized.

Unbilled unmetered:

Extent of unbilled, unmetered
consumption is unknown due to
unclear policies and poor
recordkeeping. Total consumption
is quantified based upon a purely
subjective estimate.

Clear extent of unbilled, unmetered
consumption is unknown, but a
number of events are randomly
documented each year, confirming
existence of such consumption, but
without sufficient documentation to
quantify an accurate estimate of the
annual volume consumed.

Conditions between
2 and 4
Extent of unbilled, unmetered
consumption is partially known, and
procedures exist to document certain
events such as miscellaneous fire
hydrant uses. Formulae is used to
quantify the consumption from such
events (time running multiplied by
typical flowrate, multiplied by number
of events).

Default value of

1.25% of system input
volume is employed
Coherent policies exist for some forms
of unbilled, unmetered consumption but
others await closer evaluation.

Reasonable recordkeeping for the
managed uses exists and allows for
annual volumes to be quantified by
inference, but unsupervised uses are
guesstimated.

Conditions between
6 and 8
Clear policies and good recordkeeping
exist for some uses (ex: water used in
periodic testing of unmetered fire
connections), but other uses (ex:
miscellaneous uses of fire hydrants)
have limited oversight. Total
consumption is a mix of well quantified
use such as from formulae (time
running multiplied by typical flow,
multiplied by number of events) or
temporary meters, and relatively
subjective estimates of less regulated
use.

Conditions between
8 and 10
Clear policies exist to identify permitted
use of water in unbilled, unmetered
fashion, with the intention of minimizing
this type of consumption. Good records
document each occurrence and
consumption is quantified via formulae
(time running multiplied by typical flow,
multiplied by number of events) or use
of temporary meters.

Improvements to attain higher
data grading for "Unbilled
Unmetered Consumption"
component:
to qualify for 5:

Utilize the accepted default value of

1.25% of the volume of water
supplied as an expedient means to
gain a reasonable quantification of
this use.
to qualify for 2:

Establish a policy regarding what
water uses should be allowed to
remain as unbilled and unmetered.

Consider tracking a small sample of
one such use (ex: fire hydrant
flushings).
to qualify for 5:

Utilize accepted default value of

1.25% of the volume of water
supplied as an expedient means to
gain a reasonable quantification of all
such use. This is particularly
appropriate for water utilities who are
in the early stages of the water
auditing process, and should focus on
other components since the volume
of unbilled, umetered consumption is
usually a relatively small quatity
component, and other larger-quantity
components should take priority.
to qualify for 6 or
greater:

Finalize policy and
begin to conduct field
checks to better
establish and quantify
such usage. Proceed
if top-down audit
exists and/or a great
volume of such use is
suspected.
to maintain 10:

Continue to refine policy and procedures
with intention of reducing the number of
allowable uses of water in unbilled and
unmetered fashion. Any uses that can
feasibly become billed and metered
should be converted eventually.
to qualify for 10:

Ensure that meter management (meter accuracy testing,
meter replacement) and meter reading activities for unbilled accounts are accorded the same priority as billed accounts.

Establish ongoing annual auditing process to ensure that water consumption is reliably collected and provided to the annual water audit process.
to qualify for 4:

Implement a new water utility policy requiring customer metering. Launch or expand pilot metering study to include several different meter types, which will provide data for economic assessment of full scale metering options.

Assess sites with access difficulties to devise means to obtain water consumption volumes. Begin customer meter
installation.
to qualify for 6:

Refine policy and procedures to improve customer metering participation for all but solidly exempt accounts. Assign staff resources to review billing records to identify errant
unmetered properties. Specify metering needs and funding requirements to install sufficient meters to significant reduce the number of unmetered accounts
to qualify for 4:

Review historic written directives and policy documents allowing certain accounts to be billing-exempt. Draft an outline of a written policy for billing exemptions, identify criteria that grants an exemption, with a goal of keeping this number of accounts to a minimum. Consider
increasing the priority of reading meters on unbilled
accounts at least annually.
to qualify for 6:

Draft a new written policy regarding billing exemptions based upon consensus criteria allowing this occurrence. Assign resources to audit meter records and billing records to obtain census of unbilled metered accounts. Gradually include a greater number of these metered accounts to the routes for regular meter reading.
to qualify for 10:

Refine written procedures to ensure that all uses of unbilled, unmetered water are overseen by a structured permitting process managed by water utility personnel. Reassess policy to determine if some of these uses have value in being
converted to billed and/or metered status.

APPARENT LOSSES
to qualify for 5:

Utilize accepted default value of 1.25% of the volume of water supplied as an expedient means to gain a
reasonable quantification of this use.
to qualify for 4:

Evaluate the documentation of events that have been
observed. Meet with user groups (ex: for fire hydrants - fire departments, contractors to ascertain their need and/or volume requirements for water from fire hydrants).
to qualify for 8:

Communicate billing exemption policy throughout the
organization and implement procedures that ensure proper account management. Conduct inspections of accounts
confirmed in unbilled metered status and verify that accurate meters exist and are scheduled for routine meter readings.

Gradually increase the number of unbilled metered accounts that are included in regular meter reading routes.
to qualify for 8:

Push to install customer meters on a full scale basis. Refine metering policy and procedures to ensure that all accounts, including municipal properties, are designated for meters.

Plan special efforts to address "hard-to-access" accounts.

Implement procedures to obtain a reliable consumption
estimate for the remaining few unmetered accounts awaiting meter installation.
to qualify for 10:

Continue customer meter installation throughout the service area, with a goal to minimize unmetered accounts. Sustain the effort to investigate accounts with access difficulties, and devise means to install water meters or otherwise measure water consumption.
to qualify for 8:

Assess water utility policy and procedures for various
unmetered usages. For example, ensure that a policy exists and permits are issued for use of fire hydrants by persons outside of the utility. Create written procedures for use and documentation of fire hydrants by water utility personnel.

Use same approach for other types of unbilled, unmetered water usage.

AWWA Free Water Audit Software v5.0 Grading Matrix 26
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Unauthorized consumption:

Extent of unauthorized consumption
is unknown due to unclear policies
and poor recordkeeping. Total
unauthorized consumption is
guesstimated.

Unauthorized consumption is a
known occurrence, but its extent is a
mystery. There are no requirements
to document observed events, but
periodic field reports capture some of
these occurrences. Total
unauthorized consumption is
approximated from this limited data.
conditions between
2 and 4
Procedures exist to document some
unauthorized consumption such as
observed unauthorized fire hydrant
openings. Use formulae to quantify
this consumption (time running
multiplied typical flowrate, multiplied
by number of events).

Default value of

0.25% of volume of
water supplied is
employed
Coherent policies exist for some forms
of unauthorized consumption (more
than simply fire hydrant misuse) but
others await closer evaluation.

Reasonable surveillance and
recordkeeping exist for occurrences
that fall under the policy. Volumes
quantified by inference from these
records.

Conditions between
6 and 8
Clear policies and good auditable
recordkeeping exist for certain events
(ex: tampering with water meters,
illegal bypasses of customer meters);
but other occurrences have limited
oversight. Total consumption is a
combination of volumes from formulae
(time x typical flow) and subjective
estimates of unconfirmed
consumption.

Conditions between
8 and 10
Clear policies exist to identify all known
unauthorized uses of water. Staff and
procedures exist to provide enforcement
of policies and detect violations. Each
occurrence is recorded and quantified
via formulae (estimated time running
multiplied by typical flow) or similar
methods. All records and calculations
should exist in a form that can be
audited by a third party.

Improvements to attain higher
data grading for "Unauthorized
Consumption" component:
to qualify for 5:

Use accepted default of 0.25% of
volume of water supplied.
to qualify for 2:

Review utility policy regarding what
water uses are considered
unauthorized, and consider tracking
a small sample of one such
occurrence (ex: unauthorized fire
hydrant openings)
to qualify for 5:

Utilize accepted default value of

0.25% of volume of water supplied as
an expedient means to gain a
reasonable quantification of all such
use. This is particularly appropriate
for water utilities who are in the early
stages of the water auditing process.
to qualify for 6 or
greater:

Finalize policy
updates to clearly
identify the types of
water consumption
that are authorized
from those usages
that fall outside of this
policy and are,
therefore,
unauthorized. Begin
to conduct regular
field checks. Proceed
if the top-down audit
already exists and/or
a great volume of
such use is
suspected.
to maintain 10:

Continue to refine policy and procedures
to eliminate any loopholes that allow or
tacitly encourage unauthorized
consumption. Continue to be vigilant in
detection, documentation and
enforcement efforts.

Customer metering
inaccuracies:
select n/a only if the entire
customer population is
unmetered. In such a case
the volume entered must
be zero.

Customer meters exist, but with
unorganized paper records on
meters; no meter accuracy testing
or meter replacement program for
any size of retail meter. Metering
workflow is driven chaotically with no
proactive management. Loss
volume due to aggregate meter
inaccuracy is guesstimated.

Poor recordkeeping and meter
oversight is recognized by water
utility management who has allotted
staff and funding resources to
organize improved recordkeeping
and start meter accuracy testing.

Existing paper records gathered and
organized to provide cursory
disposition of meter population.

Customer meters are tested for
accuracy only upon customer
request.

Conditions between
2 and 4
Reliable recordkeeping exists; meter
information is improving as meters
are replaced. Meter accuracy
testing is conducted annually for a
small number of meters (more than
just customer requests, but less than
1% of inventory). A limited number of
the oldest meters are replaced each
year. Inaccuracy volume is largely an
estimate, but refined based upon
limited testing data.

Conditions between
4 and 6
A reliable electronic recordkeeping
system for meters exists. The meter
population includes a mix of new high
performing meters and dated meters
with suspect accuracy. Routine, but
limited, meter accuracy testing and
meter replacement occur. Inaccuracy
volume is quantified using a mix of
reliable and less certain data.

Conditions between
6 and 8
Ongoing meter replacement and
accuracy testing result in highly
accurate customer meter population.

Testing is conducted on samples of
meters of varying age and
accumulated volume of throughput to
determine optimum replacement time
for various types of meters.

Ongoing meter
replacement and
accuracy testing result
in highly accurate
customer meter
population. Statistically
significant number of
meters are tested in
audit year. This testing
is conducted on
samples of meters of
varying age and
accumulated volume of
throughput to
determine optimum
replacement time for
these meters.

Good records of all active customer
meters exist and include as a minimum:
meter number, account
number/location, type, size and
manufacturer. Ongoing meter
replacement occurs according to a
targeted and justified basis. Regular
meter accuracy testing gives a reliable
measure of composite inaccuracy
volume for the customer meter
population. New metering technology is
embraced to keep overall accuracy
improving. Procedures are reviewed by
a third party knowledgeable in the M36
methodology.

Improvements to attain higher
data grading for "Customer
meter inaccuracy volume"
component:

If n/a is selected because
the customer meter
population is unmetered,
consider establishing a
new policy to meter the
customer population and
employ water rates based
upon metered volumes.
to qualify for 2:

Gather available meter purchase
records. Conduct testing on a small
number of meters believed to be the
most inaccurate. Review staffing
needs of the metering group and
budget for necessary resources to
better organize meter management.
to qualify for 9:

Continue efforts to manage meter
population with reliable recordkeeping.

Test a statistically significant number
of meters each year and analyze test
results in an ongoing manner to serve
as a basis for a target meter
replacement strategy based upon
accumulated volume throughput.
to qualify for 10:

Continue efforts to
manage meter
population with reliable
recordkeeping, meter
testing and
replacement. Evaluate
new meter types and
install one or more
types in 5-10 customer
accounts each year in
order to pilot improving
metering technology.
to maintain 10:

Increase the number of meters tested
and replaced as justified by meter
accuracy test data. Continually monitor
development of new metering
technology and Advanced Metering
Infrastructure (AMI) to grasp
opportunities for greater accuracy in
metering of water flow and management
of customer consumption data.
to qualify for 6:

Standardize the procedures for meter recordkeeping within an electronic information system. Accelerate meter accuracy testing and meter replacements guided by testing results. to qualify for 8:

Expand annual meter accuracy testing to evaluate a
statistically significant number of meter makes/models.

Expand meter replacement program to replace statistically significant number of poor performing meters each year. to qualify for 5:

Use accepted default of 0.25% of system input volume
to qualify for 4:

Review utility policy regarding what water uses are
considered unauthorized, and consider tracking a small
sample of one such occurrence (ex: unauthorized fire
hydrant openings)
to qualify for 4:

Implement a reliable record keeping system for customer meter histories, preferably using electronic methods
typically linked to, or part of, the Customer Billing System or Customer Information System. Expand meter accuracy
testing to a larger group of meters.
to quality for 8:

Assess water utility policies to ensure that all known
occurrences of unauthorized consumption are outlawed, and that appropriate penalties are prescribed. Create written procedures for detection and documentation of various
occurrences of unauthorized consumption as they are
uncovered.
to qualify for 10:

Refine written procedures and assign staff to seek out likely occurrences of unauthorized consumption. Explore new
locking devices, monitors and other technologies designed to detect and thwart unauthorized consumption.

AWWA Free Water Audit Software v5.0 Grading Matrix 27
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Systematic Data Handling
Errors:

Note: all water utilities
incur some amount of this
error. Even in water
utilities with unmetered
customer populations and
fixed rate billing, errors
occur in annual billing
tabulations. Enter a
positive value for the
volume and select a
grading.

Policies and procedures for
activation of new customer water
billing accounts are vague and lack
accountability. Billing data is
maintained on paper records which
are not well organized. No auditing
is conducted to confirm billing data
handling efficiency. An unknown
number of customers escape
routine billing due to lack of billing
process oversight.

Policy and procedures for activation
of new customer accounts and
oversight of billing records exist but
need refinement. Billing data is
maintained on paper records or
insufficiently capable electronic
database. Only periodic unstructured
auditing work is conducted to confirm
billing data handling efficiency. The
volume of unbilled water due to billing
lapses is a guess.

Conditions between
2 and 4
Policy and procedures for new
account activation and oversight of
billing operations exist but needs
refinement. Computerized billing
system exists, but is dated or lacks
needed functionality. Periodic, limited
internal audits conducted and confirm
with approximate accuracy the
consumption volumes lost to billing
lapses.

Conditions between
4 and 6
Policy and procedures for new account
activation and oversight of billing
operations is adequate and reviewed
periodically. Computerized billing
system is in use with basic reporting
available. Any effect of billing
adjustments on measured
consumption volumes is well
understood. Internal checks of billing
data error conducted annually.

Reasonably accurate quantification of
consumption volume lost to billing
lapses is obtained.

Conditions between
6 and 8
New account activation and billing
operations policy and procedures are
reviewed at least biannually.

Computerized billing system includes
an array of reports to confirm billing
data and system functionality. Checks
are conducted routinely to flag and
explain zero consumption accounts.

Annual internal checks conducted with
third party audit conducted at least
once every five years. Accountability
checks flag billing lapses.

Consumption lost to billing lapses is
well quantified and reducing year-byyear.

Conditions between
8 and 10
Sound written policy and procedures
exist for new account activation and
oversight of customer billing operations.

Robust computerized billing system
gives high functionality and reporting
capabilities which are utilized, analyzed
and the results reported each billing
cycle. Assessment of policy and data
handling errors are conducted internally
and audited by third party at least once
every three years, ensuring
consumption lost to billing lapses is
minimized and detected as it occurs.

Improvements to attain higher
data grading for "Systematic
Data Handling Error volume"
component:
to qualify for 2:

Draft written policy and procedures
for activating new water billing
accounts and oversight of billing
operations. Investigate and budget
for computerized customer billing
system. Conduct initial audit of
billing records by flow-charting the
basic business processes of the
customer account/billing function.
to maintain 10:

Stay abreast of customer information
management developments and
innovations. Monitor developments of
Advanced Metering Infrastructure (AMI)
and integrate technology to ensure that
customer endpoint information is wellmonitored and errors/lapses are at an economic minimum.

Length of mains:

Poorly assembled and maintained
paper as-built records of existing
water main installations makes
accurate determination of system
pipe length impossible. Length of
mains is guesstimated.

Paper records in poor or uncertain
condition (no annual tracking of
installations & abandonments). Poor
procedures to ensure that new water
mains installed by developers are
accurately documented.

Conditions between
2 and 4
Sound written policy and procedures
exist for documenting new water main
installations, but gaps in management
result in a uncertain degree of error in
tabulation of mains length.

Conditions between
4 and 6
Sound written policy and procedures
exist for permitting and commissioning
new water mains. Highly accurate
paper records with regular field
validation; or electronic records and
asset management system in good
condition. Includes system backup.

Conditions between
6 and 8
Sound written policy and procedures
exist for permitting and commissioning
new water mains. Electronic
recordkeeping such as a Geographical
Information System (GIS) and asset
management system are used to
store and manage data.

Conditions between
8 and 10
Sound written policy exists for managing
water mains extensions and
replacements. Geographic Information
System (GIS) data and asset
management database agree and
random field validation proves truth of
databases. Records of annual field
validation should be available for review.

Improvements to attain higher
data grading for "Length of
Water Mains" component:
to qualify for 2:

Assign personnel to inventory
current as-built records and
compare with customer billing
system records and highway plans
in order to verify poorly documented
pipelines. Assemble policy
documents regarding permitting and
documentation of water main
installations by the utility and building
developers; identify gaps in
procedures that result in poor
documentation of new water main
installations.
to maintain 10:

Continue with standardization and
random field validation to improve the
completeness and accuracy of the
system.

Number of active AND inactive
service connections:

Vague permitting (of new service
connections) policy and poor paper
recordkeeping of customer
connections/billings result in suspect
determination of the number of
service connections, which may be
10-15% in error from actual count.

General permitting policy exists but
paper records, procedural gaps, and
weak oversight result in questionable
total for number of connections,
which may vary 5-10% of actual
count.

Conditions between
2 and 4
Written account activation policy and
procedures exist, but with some gaps
in performance and oversight.

Computerized information
management system is being brought
online to replace dated paper
recordkeeping system. Reasonably
accurate tracking of service
connection installations &
abandonments; but count can be up
to 5% in error from actual total.

Conditions between
4 and 6
Written new account activation and
overall billing policies and procedures
are adequate and reviewed
periodically. Computerized information
management system is in use with
annual installations & abandonments
totaled. Very limited field verifications
and audits. Error in count of number of
service connections is believed to be
no more than 3%.

Conditions between
6 and 8
Policies and procedures for new
account activation and overall billing
operations are written, well-structured
and reviewed at least biannually. Wellmanaged computerized information management system exists and
routine, periodic field checks and
internal system audits are conducted.

Counts of connections are no more
than 2% in error.

Conditions between
8 and 10
Sound written policy and well managed
and audited procedures ensure reliable
management of service connection
population. Computerized information
management system, Customer Billing
System, and Geographic Information
System (GIS) information agree; field
validation proves truth of databases.

Count of connections recorded as being
in error is less than 1% of the entire
population.

Improvements to attain higher
data grading for "Number of
Active and Inactive Service
Connections" component:

Note: The number of
Service Connections
does not include fire
hydrant leads/lines
connecting the hydrant
to the water main
to qualify for 2:

Draft new policy and procedures for
new account activation and overall
billing operations. Research and
collect paper records of installations
& abandonments for several years
prior to audit year.
to maintain 10:

Continue with standardization and
random field validation to improve
knowledge of system.
to qualify for 10:

Close any procedural loopholes that allow installations to go undocumented. Link computerized information management
system with Geographic Information System (GIS) and
formalize field inspection and information system auditing processes. Documentation of new or decommissioned service connections encounters several levels of checks and balances. to qualify for 4:

Refine policy and procedures for new account activation and overall billing operations. Research computerized
recordkeeping system (Customer Information System or
Customer Billing System) to improve documentation format for service connections.
to qualify for 6:

Refine procedures to ensure consistency with new account activation and overall billing policy to establish new service connections or decommission existing connections. Improve process to include all totals for at least five years prior to audit year.
to qualify for 4:

Complete inventory of paper records of water main
installations for several years prior to audit year. Review policy and procedures for commissioning and documenting new water main installation.
to qualify for 8:

Launch random field checks of limited number of locations.

Convert to electronic database such as a Geographic
Information System (GIS) with backup as justified. Develop written policy and procedures.
to qualify for 10:

Link Geographic Information System (GIS) and asset
management databases, conduct field verification of data.

Record field verification information at least annually. to qualify for 6:

Finalize updates/improvements to written policy and
procedures for permitting/commissioning new main
installations. Confirm inventory of records for five years prior to audit year; correct any errors or omissions.

Note: if customer water
meters are located outside
to qualify for 4:

Finalize written policy and procedures for activation of new billing acocunts and overall billing operations management.

Implement a computerized customer billing system.

Conduct initial audit of billing records as part of this process.
to qualify for 6:

Refine new account activation and billing operations
procedures and ensure consistency with the utility policy regarding billing, and minimize opportunity for missed billings.

Upgrade or replace customer billing system for needed
functionality - ensure that billing adjustments don't corrupt the value of consumption volumes. Procedurize internal annual audit process.
to qualify for 8:

Formalize regular review of new account activation process and general billing practices. Enhance reporting capability of computerized billing system. Formalize regular auditing process to reveal scope of data handling error. Plan for periodic third party audit to occur at least once every five years.

Gradings 1-9 apply if customer properties are unmetered, if customer meters exist and are located inside the customer building premises, or if the water utility owns and is responsible for the entire service connection piping from the water main to the customer building. In any of these cases the average distance between the curb stop or boundary separating utility/customer responsibility for service connection piping, and the typical first point of use (ex: faucet) or the customer meter must be quantified. Gradings of 1-9 are used to grade the validity of the means to quantify this value. (See the "Service Connection Diagram" worksheet) to qualify for 8:

Formalize regular review of new account activation and
overall billing operations policies and procedures. Launch random field checks of limited number of locations. Develop reports and auditing mechanisms for computerized
information management system.

SYSTEM DATA
Either of two conditions can be met for a
grading of 10:
a) Customer water meters exist outside
to qualify for 10:

Close policy/procedure loopholes that allow some customer accounts to go unbilled, or data handling errors to exist.

Ensure that billing system reports are utilized, analyzed and reported every billing cycle. Ensure that internal and third party audits are conducted at least once every three years.

AWWA Free Water Audit Software v5.0 Grading Matrix 28
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Vague policy exists to define the
delineation of water utility ownership
and customer ownership of the
service connection piping. Curb
stops are perceived as the
breakpoint but these have not been
well-maintained or documented.

Most are buried or obscured. Their
location varies widely from site-tosite, and estimating this distance is arbitrary due to the unknown location
of many curb stops.

Policy requires that the curb stop
serves as the delineation point
between water utility ownership and
customer ownership of the service
connection piping. The piping from
the water main to the curb stop is the
property of the water utility; and the
piping from the curb stop to the
customer building is owned by the
customer. Curb stop locations are
not well documented and the
average distance is based upon a
limited number of locations
measured in the field.

Conditions between
2 and 4
Good policy requires that the curb
stop serves as the delineation point
between water utility ownership and
customer ownership of the service
connection piping. Curb stops are
generally installed as needed and are
reasonably documented. Their
location varies widely from site-tosite, and an estimate of this distance is hindered by the availability of paper
records of limited accuracy.

Conditions between
4 and 6
Clear written policy exists to define
utility/customer responsibility for
service connection piping. Accurate,
well-maintained paper or basic
electronic recordkeeping system
exists. Periodic field checks confirm
piping lengths for a sample of
customer properties.

Conditions between
6 and 8
Clearly worded policy standardizes the
location of curb stops and meters,
which are inspected upon installation.

Accurate and well maintained
electronic records exist with periodic
field checks to confirm locations of
service lines, curb stops and customer
meter pits. An accurate number of
customer properties from the
customer billing system allows for
reliable averaging of this length.

Conditions between
8 and 10
Improvements to attain higher
data grading for "Average
Length of Customer Service
Line" component:
to qualify for 2:

Research and collect paper records
of service line installations. Inspect
several sites in the field using pipe
locators to locate curb stops. Obtain
the length of this small sample of
connections in this manner.
to maintain 10:

Continue with standardization and
random field validation to improve
knowledge of service connection
configurations and customer meter
locations.

Average operating pressure:

Available records are poorly
assembled and maintained paper
records of supply pump
characteristics and water distribution
system operating conditions.

Average pressure is guesstimated
based upon this information and
ground elevations from crude
topographical maps. Widely varying
distribution system pressures due to
undulating terrain, high system head
loss and weak/erratic pressure
controls further compromise the
validity of the average pressure
calculation.

Limited telemetry monitoring of
scattered pumping station and water
storage tank sites provides some
static pressure data, which is
recorded in handwritten logbooks.

Pressure data is gathered at
individual sites only when low
pressure complaints arise. Average
pressure is determined by averaging
relatively crude data, and is affected
by significant variation in ground
elevations, system head loss and
gaps in pressure controls in the
distribution system.

Conditions between
2 and 4
Effective pressure controls separate
different pressure zones; moderate
pressure variation across the system,
occasional open boundary valves are
discovered that breech pressure
zones. Basic telemetry monitoring of
the distribution system logs pressure
data electronically. Pressure data
gathered by gauges or dataloggers at
fire hydrants or buildings when low
pressure complaints arise, and during
fire flow tests and system flushing.

Reliable topographical data exists.

Average pressure is calculated using
this mix of data.

Conditions between
4 and 6
Reliable pressure controls separate
distinct pressure zones; only very
occasional open boundary valves are
encountered that breech pressure
zones. Well-covered telemetry
monitoring of the distribution system
(not just pumping at source treatment
plants or wells) logs extensive pressure
data electronically. Pressure gathered
by gauges/dataloggers at fire hydrants
and buildings when low pressure
complaints arise, and during fire flow
tests and system flushing. Average
pressure is determined by using this
mix of reliable data.

Conditions between
6 and 8
Well-managed, discrete pressure
zones exist with generally predictable
pressure fluctuations. A current fullscale SCADA System or similar realtime monitoring system exists to
monitor the water distribution system
and collect data, including real time
pressure readings at representative
sites across the system. The average
system pressure is determined from
reliable monitoring system data.

Conditions between
8 and 10
Well-managed pressure districts/zones,
SCADA System and hydraulic model
exist to give very precise pressure data
across the water distribution system.

Average system pressure is reliably
calculated from extensive, reliable, and
cross-checked data. Calculations are
reported on an annual basis as a
minimum.

Improvements to attain higher
data grading for "Average
Operating Pressure"
component:
to qualify for 2:

Employ pressure gauging and/or
datalogging equipment to obtain
pressure measurements from fire
hydrants. Locate accurate
topographical maps of service area
in order to confirm ground
elevations. Research pump data
sheets to find pump pressure/flow
characteristics
to maintain 10:

Continue to refine the hydraulic model of
the distribution system and consider
linking it with SCADA System for realtime pressure data calibration, and averaging.
to qualify for 4:

Formalize a procedure to use pressure
gauging/datalogging equipment to gather pressure data
during various system events such as low pressure
complaints, or operational testing. Gather pump pressure and flow data at different flow regimes. Identify faulty pressure controls (pressure reducing valves, altitude
valves, partially open boundary valves) and plan to properly configure pressure zones. Make all pressure data from
these efforts available to generate system-wide average pressure.
to qualify for 6:

Expand the use of pressure gauging/datalogging equipment to gather scattered pressure data at a representative set of sites, based upon pressure zones or areas. Utilize pump pressure and flow data to determine supply head entering each pressure zone or district. Correct any faulty pressure controls (pressure reducing valves, altitude valves, partially open boundary valves) to ensure properly configured
pressure zones. Use expanded pressure dataset from these activities to generate system-wide average pressure.
to qualify for 8:

Install a Supervisory Control and Data Acquisition (SCADA) System, or similar realtime monitoring system, to monitor system parameters and control operations. Set regular
calibration schedule for instrumentation to insure data accuracy. Obtain accurate topographical data and utilize pressure data gathered from field surveys to provide
extensive, reliable data for pressure averaging.
to qualify for 10:

Annually, obtain a system-wide average pressure value from the hydraulic model of the distribution system that has been calibrated via field measurements in the water distribution system and confirmed in comparisons with SCADA System
data.
to qualify for 6:

Establish coherent procedures to ensure that policy for curb stop, meter installation and documentation is followed. Gain consensus within the water utility for the establishment of a computerized information management system.
to qualify for 4:

Formalize and communicate policy delineating
utility/customer responsibilities for service connection piping. Assess accuracy of paper records by field
inspection of a small sample of service connections using pipe locators as needed. Research the potential migration to a computerized information management system to
store service connection data.
to qualify for 10:

Link customer information management system and
Geographic Information System (GIS), standardize process for field verification of data.
to qualify for 8:

Implement an electronic means of recordkeeping, typically via a customer information system, customer billing system, or Geographic Information System (GIS). Standardize the process to conduct field checks of a limited number of
locations.

Average length of customer
service line:
meters are located outside
of the customer building
next to the curb stop or
boundary separating
utility/customer
responsibility, then the
auditor should answer
"Yes" to the question on
the Reporting Worksheet
asking about this. If the
answer is Yes, the grading
description listed under the
Grading of 10(a) will be
followed, with a value of
zero automatically entered
at a Grading of 10. See
the Service Connection
Diagram worksheet for a
visual presentation of this
distance.
a) Customer water meters exist outside
of customer buildings next to the curb
stop or boundary separating
utility/customer responsibility for service
connection piping. If so, answer "Yes"
to the question on the Reporting
Working asking about this condition. A
value of zero and a Grading of 10 are
automatically entered in the Reporting
Worksheet .
b). Meters exist inside customer
buildings, or properties are unmetered.

In either case, answer "No" to the
Reporting Worksheet question on meter
location, and enter a distance
determined by the auditor. For a
Grading of 10 this value must be a very
reliable number from a Geographic
Information System (GIS) and
confirmed by a statistically valid number
of field checks.

AWWA Free Water Audit Software v5.0 Grading Matrix 29
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Total annual cost of operating
water system:

Incomplete paper records and lack
of financial accounting
documentation on many operating
functions makes calculation of water
system operating costs a pure
guesstimate
Reasonably maintained, but
incomplete, paper or electronic
accounting provides data to estimate
the major portion of water system
operating costs.

Conditions between
2 and 4
Electronic, industry-standard cost
accounting system in place.

However, gaps in data are known to
exist, periodic internal reviews are
conducted but not a structured
financial audit.

Conditions between
4 and 6
Reliable electronic, industry-standard
cost accounting system in place, with
all pertinent water system operating
costs tracked. Data audited
periodically by utility personnel, but not
a Certified Public Accountant (CPA).

Conditions between
6 and 8
Reliable electronic, industry-standard
cost accounting system in place, with
all pertinent water system operating
costs tracked. Data audited at least
annually by utility personnel, and at
least once every three years by thirdparty CPA.

Conditions between
8 and 10
Reliable electronic, industry-standard
cost accounting system in place, with all
pertinent water system operating costs
tracked. Data audited annually by utility
personnel and annually also by thirdparty CPA.

Improvements to attain higher
data grading for "Total Annual
Cost of Operating the Water
System" component:
to qualify for 2:

Gather available records, institute
new financial accounting procedures
to regularly collect and audit basic
cost data of most important
operations functions.
to maintain 10:

Maintain program, stay abreast of
expenses subject to erratic cost
changes and long-term cost trend, and
budget/track costs proactively
Customer retail unit cost
(applied to Apparent Losses):

Customer population
unmetered, and/or only a
fixed fee is charged for
consumption.

Antiquated, cumbersome water rate
structure is used, with periodic
historic amendments that were
poorly documented and
implemented; resulting in classes of
customers being billed inconsistent
charges. The actual composite
billing rate likely differs significantly
from the published water rate
structure, but a lack of auditing
leaves the degree of error
indeterminate.

Dated, cumbersome water rate
structure, not always employed
consistently in actual billing
operations. The actual composite
billing rate is known to differ from the
published water rate structure, and a
reasonably accurate estimate of the
degree of error is determined,
allowing a composite billing rate to be
quantified.

Conditions between
2 and 4
Straight-forward water rate structure
in use, but not updated in several
years. Billing operations reliably
employ the rate structure. The
composite billing rate is derived from
a single customer class such as
residential customer accounts,
neglecting the effect of different rates
from varying customer classes.

Conditions between
4 and 6
Clearly written, up-to-date water rate
structure is in force and is applied
reliably in billing operations.

Composite customer rate is
determined using a weighted average
residential rate using volumes of water
in each rate block.

Conditions between
6 and 8
Effective water rate structure is in
force and is applied reliably in billing
operations. Composite customer rate
is determined using a weighted
average composite consumption rate,
which includes residential, commercial,
industrial, institutional (CII), and any
other distinct customer classes within
the water rate structure.

Conditions between
8 and 10
Current, effective water rate structure is
in force and applied reliably in billing
operations. The rate structure and
calculations of composite rate - which
includes residential, commercial,
industrial, institutional (CII), and other
distinct customer classes - are reviewed
by a third party knowledgeable in the
M36 methodology at least once every
five years.

Improvements to attain higher
data grading for "Customer
Retail Unit Cost" component:
to qualify for 2:

Formalize the process to implement
water rates, including a secure
documentation procedure. Create a
current, formal water rate document
and gain approval from all
stakeholders.
to qualify for 6:

Evaluate volume of water used in
each usage block by residential
users. Multiply volumes by full rate
structure.

Launch effort to fully
meter the customer
population and charge
rates based upon
water volumes
to maintain 10:

Keep water rate structure current in
addressing the water utility's revenue
needs. Update the calculation of the
customer unit rate as new rate
components, customer classes, or other
components are modified.

Variable production cost
(applied to Real Losses):

Note: if the water utility
purchases/imports its
entire water supply, then
enter the unit purchase
cost of the bulk water
supply in the Reporting
Worksheet with a grading
of 10
Incomplete paper records and lack
of documentation on primary
operating functions (electric power
and treatment costs most
importantly) makes calculation of
variable production costs a pure
guesstimate
Reasonably maintained, but
incomplete, paper or electronic
accounting provides data to roughly
estimate the basic operations costs
(pumping power costs and treatment
costs) and calculate a unit variable
production cost.

Conditions between
2 and 4
Electronic, industry-standard cost
accounting system in place. Electric
power and treatment costs are
reliably tracked and allow accurate
weighted calculation of unit variable
production costs based on these two
inputs and water imported purchase
costs (if applicable). All costs are
audited internally on a periodic basis.

Conditions between
4 and 6
Reliable electronic, industry-standard
cost accounting system in place, with
all pertinent water system operating
costs tracked. Pertinent additional
costs beyond power, treatment and
water imported purchase costs (if
applicable) such as liability, residuals
management, wear and tear on
equipment, impending expansion of
supply, are included in the unit variable
production cost, as applicable. The
data is audited at least annually by
utility personnel.

Conditions between
6 and 8
Reliable electronic, industry-standard
cost accounting system in place, with
all pertinent primary and secondary
variable production and water
imported purchase (if applicable)
costs tracked. The data is audited at
least annually by utility personnel, and
at least once every three years by a
third-party knowledgeable in the M36
methodology.

Conditions between
8 and 10
Either of two conditions can be met to
obtain a grading of 10:
1) Third party CPA audit of all pertinent
primary and secondary variable
production and water imported purchase
(if applicable) costs on an annual basis.
or:
2) Water supply is entirely purchased as
bulk water imported, and the unit
purchase cost - including all applicable
marginal supply costs - serves as the
variable production cost. If all applicable
marginal supply costs are not included
in this figure, a grade of 10 should not
be selected.

Improvements to attain higher
data grading for "Variable
Production Cost" component:
to qualify for 2:

Gather available records, institute
new procedures to regularly collect
and audit basic cost data and most
important operations functions.
to maintain 10:

Maintain program, stay abreast of
expenses subject to erratic cost
changes and budget/track costs
proactively
to qualify for 6:

Formalize process for regular internal audits of production costs. Assess whether additional costs (liability, residuals management, equipment wear, impending infrastructure
expansion) should be included to calculate a more
representative variable production cost.
to qualify for 8:

Formalize the accounting process to include direct cost components (power, treatment) as well as indirect cost
components (liability, residuals management, etc.) Arrange to conduct audits by a knowledgable third-party at least once every three years.
to qualify for 10:

Standardize the process to conduct a third-party financial audit by a CPA on an annual basis.
to qualify for 4:

Implement an electronic cost accounting system,
structured according to accounting standards for water
utilities
to qualify for 4:

Review the water rate structure and update/formalize as needed. Assess billing operations to ensure that actual billing operations incorporate the established water rate structure.
to qualify for 8:

Evaluate volume of water used in each usage block by all classifications of users. Multiply volumes by full rate structure.
to qualify for 10:

Conduct a periodic third-party audit of water used in each usage block by all classifications of users. Multiply volumes by full rate structure.
to qualify for 4:

Implement an electronic cost accounting system,
structured according to accounting standards for water
utilities
to qualify for 10:

Standardize the process to conduct a third-party financial audit by a CPA on an annual basis.

COST DATA
to qualify for 6:

Establish process for periodic internal audit of water system operating costs; identify cost data gaps and institute
procedures for tracking these outstanding costs.
to qualify for 8:

Standardize the process to conduct routine financial audit on an annual basis. Arrange for CPA audit of financial records at least once every three years.

AWWA Free Water Audit Software v5.0 Grading Matrix 30
General Comment:

Audit Item Comment
Volume from own sources: All non desalter well production + desalter wells Vol. from own sources: Master meter
error adjustment:

Water imported: WR-19, WR-24, WR-33, Arlington Desalter Water imported: master meter error
adjustment:

Water exported: Norco and Home Gardens
Water exported: master meter error
adjustment:

Billed metered:

Billed unmetered:

Unbilled metered:

Unbilled unmetered:

AWWA Free Water Audit Software:

User Comments
Use this worksheet to add comments or notes to explain how an input value was calculated, or to document the sources of the information used.

WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

AWWA Free Water Audit Software v5.0 Comments 4
Audit Item Comment
Unauthorized consumption:

Customer metering inaccuracies:

Systematic data handling errors:

Length of mains:

Number of active AND inactive
service connections:

Average length of customer service
line:

Average operating pressure:

Total annual cost of operating water
system:

Customer retail unit cost (applied to
Apparent Losses):

Variable production cost (applied to
Real Losses):

AWWA Free Water Audit Software v5.0 Comments 5
AWWA Free Water Audit Software:

Customer Service Line Diagrams
Average Length of Customer
Service Line
The three figures shown on this
worksheet display the
assignment of the Average
Length of Customer Service
Line, Lp, for the three most
common piping configurations.

Figure 1 shows the
configuration of the water meter
outside of the customer building
next to the curb stop valve. In
this configuration Lp = 0 since
the distance between the curb
stop and the customer metering
point is essentially zero.

Figure 2 shows the
configuration of the customer
water meter located inside the
customer building, where Lp is
the distance from the curb stop
to the water meter.

Figure 3 shows the
configuration of an unmetered
customer building , where Lp is
the distance from the curb stop
to the first point of customer
water consumption, or, more
simply, the building line.

In any water system the Lp will
vary notably in a community of
different structures, therefore
the average Lp value is used
and this should be
approximated or calculated if a
sample of service line
measurements has been
gathered.

Figure 1
Figure 2
Figure 3
American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
Click for more
information
AWWA Free Water Audit Software v5.0 Service Connection Diagram 31 Item Name
Apparent
Losses

AUTHORIZED

CONSUMPTION
Average length of
customer service
line
Average operating
pressure
Billed Authorized
Consumption
Billed metered
consumption
Billed unmetered
consumption
All consumption that is billed and authorized by the utility. This may include both metered and unmetered consumption. See "Authorized Consumption" for more information.
= unauthorized consumption + customer metering inaccuracies + systematic data handling errors Apparent Losses include all types of inaccuracies associated with customer metering (worn meters as well as improperly sized meters or wrong type of meter for the water usage profile) as well as systematic data handling errors (meter reading, billing, archiving and reporting), plus unauthorized consumption (theft or illegal use).

NOTE: Over-estimation of Apparent Losses results in under-estimation of Real Losses. Under-estimation of Apparent Losses results in over-estimation of Real Losses.

All metered consumption which is billed to retail customers, including all groups of customers such as domestic, commercial, industrial or institutional. It does NOT include water supplied to neighboring utilities (water exported) which is metered and billed. Be sure to subtract any consumption for exported water sales that may be included in these billing roles. Water supplied as exports to neighboring water utilities should be included only in the Water Exported component. The metered consumption data can be taken directly from billing records for the water audit period. The accuracy of yearly metered consumption data can be refined by including an adjustment to account for customer meter reading lag time since not all customer meters are read on the same day of the meter reading period. However additional analysis is necessary to determine the lag time adjustment value, which may or may not be significant.

All billed consumption which is calculated based on estimates or norms from water usage sites that have been determined by utility policy to be left unmetered.

This is typically a very small component in systems that maintain a policy to meter their customer population. However, this quantity can be the key consumption component in utilities that have not adopted a universal metering policy. This component should NOT include any water that is supplied to neighboring utilities (water exported) which is unmetered but billed. Water supplied as exports to neighboring water utilities should be included only in the Water Exported component.

AWWA Free Water Audit Software:

Definitions
Description
= billed water exported + billed metered + billed unmetered + unbilled metered + unbilled unmetered consumption The volume of metered and/or unmetered water taken by registered customers, the water utility's own uses, and uses of others who are implicitly or explicitly authorized to do so by the water utility; for residential, commercial, industrial and public-minded purposes.

Typical retail customers' consumption is tabulated usually from established customer accounts as billed metered consumption, or - for unmetered customers - billed unmetered consumption. These types of consumption, along with billed water exported, provide revenue potential for the water utility. Be certain to tabulate the water exported volume as a separate component and do not "double-count" it by including in the billed metered consumption component as well as the water exported component.

Unbilled authorized consumption occurs typically in non-account uses, including water for fire fighting and training, flushing of water mains and sewers, street cleaning, watering of municipal gardens, public fountains, or similar public-minded uses. Occasionally these uses may be metered and billed (or charged a flat fee), but usually they are unmetered and unbilled. In the latter case, the water auditor may use a default value to estimate this quantity, or implement procedures for the reliable quantification of these uses. This starts with documenting usage events as they occur and estimating the amount of water used in each event. (See Unbilled unmetered consumption)
This is the average length of customer service line, Lp, that is owned and maintained by the customer; from the point of ownership transfer to the customer water meter, or building line (if unmetered). The quantity is one of the data inputs for the calculation of Unavoidable Annual Real Losses (UARL), which serves as the denominator of the performance indicator: Infrastructure Leakage Index (ILI). The value of Lp is multiplied by the number of customer service connections to obtain a total length of customer owned piping in the system. The purpose of this parameter is to account for the unmetered service line infrastructure that is the responsibility of the customer for arranging repairs of leaks that occur on their lines. In many cases leak repairs arranged by customers take longer to be executed than leak repairs arranged by the water utility on utility-maintained piping. Leaks run longer - and lose more water - on customer-owned service piping, than utility owned piping.

If the customer water meter exists near the ownership transfer point (usually the curb stop located between the water main and the customer premises) this distance is zero because the meter and transfer point are the same. This is the often encountered configuration of customer water meters located in an underground meter box or "pit" outside of the customer's building. The Free Water Audit Software asks a "Yes/No" question about the meter at this location. If the auditor selects "Yes" then this distance is set to zero and the data grading score for this component is set to 10.

If water meters are typically located inside the customer premise/building, or properties are unmetered, it is up to the water auditor to estimate a system-wide average Lp length based upon the various customer land parcel sizes and building locations in the service area. Lp will be a shorter length in areas of high density housing, and a longer length in areas of low density housing and varied commercial and industrial buildings. General parcel demographics should be employed to obtain a composite average Lp length for the entire system.

Refer to the "Service Connection Diagram" worksheet for a depiction of the service line/metering configurations that typically exist in water utilities. This worksheet gives guidance on the determination of the Average Length, Lp, for each configuration.

This is the average pressure in the distribution system that is the subject of the water audit. Many water utilities have a calibrated hydraulic model of their water distribution system. For these utilities, the hydraulic model can be utilized to obtain a very accurate quantity of average pressure. In the absence of a hydraulic model, the average pressure may be approximated by obtaining readings of static water pressure from a representative sample of fire hydrants or other system access points evenly located across the system. A weighted average of the pressure can be assembled; but be sure to take into account the elevation of the fire hydrants, which typically exist several feet higher than the level of buried water pipelines. If the water utility is compiling the water audit for the first time, the average pressure can be approximated, but with a low data grading. In subsequent years of auditing, effort should be made to improve the accuracy of the average pressure quantity. This will then qualify the value for a higher data grading.

A
WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

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AWWA Free Water Audit Software v5.0 Definitions 32
Item Name Description
A
Customer
metering
inaccuracies
Customer retail
unit cost
Infrastructure
Leakage Index
(ILI)
Length of mains

NON-REVENUE
WATER
Number of active
AND inactive
service
connections
Real Losses
Revenue Water
Service
Connection
Density
= Apparent Losses + Real Losses + Unbilled Metered Consumption + Unbilled Unmetered Consumption. This is water which does not provide revenue potential to the utility.

Number of customer service connections, extending from the water main to supply water to a customer. Please note that this includes the actual number of distinct piping connections, including fire connections, whether active or inactive. This may differ substantially from the number of customers (or number of accounts). Note: this number does not include the pipeline leads to fire hydrants - the total length of piping supplying fire hyrants should be included in the "Length of mains" parameter.

Apparent water losses caused by the collective under-registration of customer water meters. Many customer water meters gradually wear as large cumulative volumes of water are passed through them over time. This causes the meters to under-register the flow of water. This occurrence is common with smaller residential meters of sizes 5/8-inch and 3/4 inch after they have registered very large cumulative volumes of water, which generally occurs only after periods of years. For meters sized 1-inch and larger - typical of multi-unit residential, commercial and industrial accounts - meter under-registration can occur from wear or from the improper application of the meter; i.e. installing the wrong type of meter or the wrong size of meter, for the flow pattern (profile) of the consumer. For instance, many larger meters have reduced accuracy at low flows. If an oversized meter is installed, most of the time the routine flow will occur in the low flow range of the meter, and a significant portion of it may not be registered. It is important to properly select and install all meters, but particularly large customer meters, size 1-inch and larger.

The auditor has two options for entering data for this component of the audit. The auditor can enter a percentage under-registration (typically an estimated value), this will apply the selected percentage to the two categories of metered consumption to determine the volume of water not recorded due to customer meter inaccuracy. Note that this percentage is a composite average inaccuracy for all customer meters in the entire meter population. The percentage will be multiplied by the sum of the volumes in the Billed Metered and Unbilled Metered components. Alternatively, if the auditor has substantial data from meter testing activities, he or she can calculate their own loss volumes, and this volume may be entered directly.

Note that a value of zero will be accepted but an alert will appear asking if the customer population is unmetered. Since all metered systems have some degree of inaccuracy, a positive value should be entered. A value of zero in this component is valid only if the water utility does not meter its customer population.

The Customer Retail Unit Cost represents the charge that customers pay for water service. This unit cost is applied routinely to the components of Apparent Loss, since these losses represent water reaching customers but not (fully) paid for. Since most water utilities have a rate structure that includes a variety of different costs based upon class of customer, a weighted average of individual costs and number of customer accounts in each class can be calculated to determine a single composite cost that should be entered into this cell. Finally, the weighted average cost should also include additional charges for sewer, storm water or biosolids processing, but only if these charges are based upon the volume of potable water consumed.

For water utilities in regions with limited water resources and a questionable ability to meet the drinking water demands in the future, the Customer Retail Unit Cost might also be applied to value the Real Losses; instead of applying the Variable Production Cost to Real Losses. In this way, it is assumed that every unit volume of leakage reduced by leakage management activities will be sold to a customer.

Note: the Free Water Audit Software allows the user to select the units that are charged to customers (either $/1,000 gallons, $/hundred cubic feet, or $/1,000 litres) and automatically converts these units to the units that appear in the "WATER SUPPLIED" box. The monetary units are United States dollars, $.

The ratio of the Current Annual Real Losses (Real Losses) to the Unavoidable Annual Real Losses (UARL). The ILI is a highly effective performance indicator for comparing (benchmarking) the performance of utilities in operational management of real losses.

Physical water losses from the pressurized system (water mains and customer service connections) and the utility’s storage tanks, up to the point of customer consumption. In metered systems this is the customer meter, in unmetered situations this is the first point of consumption (stop tap/tap) within the property. The annual volume lost through all types of leaks, breaks and overflows depends on frequencies, flow rates, and average duration of individual leaks, breaks and overflows.
=number of customer service connections / length of mains Length of all pipelines (except service connections) in the system starting from the point of system input metering (for example at the outlet of the treatment plant). It is also recommended to include in this measure the total length of fire hydrant lead pipe. Hydrant lead pipe is the pipe branching from the water main to the fire hydrant. Fire hydrant leads are typically of a sufficiently large size that is more representative of a pipeline than a service connection. The average length of hydrant leads across the entire system can be assumed if not known, and multiplied by the number of fire hydrants in the system, which can also be assumed if not known. This value can then be added to the total pipeline length. Total length of mains can therefore be calculated as:

Length of Mains, miles = (total pipeline length, miles) + [ {(average fire hydrant lead length, ft) x (number of fire hydrants)} / 5,280 ft/mile ] or
Length of Mains, kilometres = (total pipeline length, kilometres) + [ {(average fire hydrant lead length, metres) x (number of fire hydrants)} / 1,000 metres/kilometre ]
Those components of System Input Volume that are billed and have the potential to produce revenue.

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AWWA Free Water Audit Software v5.0 Definitions 33
Item Name Description
A
Systematic data
handling errors
Total annual cost
of operating the
water system
Unauthorized
consumption
Unbilled
Authorized
Consumption
Unavoidable
Annual Real
Losses (UARL)
UARL (gallons)=(5.41Lm + 0.15Nc + 7.5Lc) xP,
or
UARL (litres)=(18.0Lm + 0.8Nc + 25.0Lc) xP
where:

Lm = length of mains (miles or kilometres)
Nc = number of customer service connections
Lp = the average distance of customer service connection piping (feet or metres) (see the Worksheet "Service Connection Diagram" for guidance on deterring the value of Lp) Lc = total length of customer service connection piping (miles or km) Lc = Nc X Lp (miles or kilometres)
P = Pressure (psi or metres)
The UARL is a theoretical reference value representing the technical low limit of leakage that could be achieved if all of today's best technology could be successfully applied. It is a key variable in the calculation of the Infrastructure Leakage Index (ILI). Striving to reduce system leakage to a level close to the UARL is usually not needed unless the water supply is unusually expensive, scarce or both.

NOTE: The UARL calculation has not yet been proven as fully valid for very small, or low pressure water distribution systems. If, in gallons:
(Lm x 32) + Nc < 3000 or
P <35psi
in litres:
(Lm x 20) + Nc < 3000 or
P < 25m
then the calculated UARL value may not be valid. The software does not display a value of UARL or ILI if either of these conditions is true.

All consumption that is unbilled, but still authorized by the utility. This includes Unbilled Metered Consumption + Unbilled Unmetered Consumption. See "Authorized Consumption" for more information. For Unbilled Unmetered Consumption, the Free Water Audit Software provides the auditor the option to select a default value if they have not audited unmetered activities in detail. The default calculates a volume that is 1.25% of the Water Supplied volume. If the auditor has carefully audited the various unbilled, unmetered, authorized uses of water, and has established reliable estimates of this collective volume, then he or she may enter the volume directly for this component, and not use the default value.

Includes water illegally withdrawn from fire hydrants, illegal connections, bypasses to customer consumption meters, or tampering with metering or meter reading equipment; as well as any other ways to receive water while thwarting the water utility's ability to collect revenue for the water. Unauthorized consumption results in uncaptured revenue and creates an error that understates customer consumption. In most water utilities this volume is low and, if the water auditor has not yet gathered detailed data for these loss occurrences, it is recommended that the auditor apply a default value of 0.25% of the volume of water supplied. However, if the auditor has investigated unauthorized occurrences, and has well validated data that indicates the volume from unauthorized consumption is substantially higher or lower than that generated by the default value, then the auditor should enter a quantity that was derived from the utility investigations. Note that a value of zero will not be accepted since all water utilities have some volume of unauthorized consumption occurring in their system.

Note: if the auditor selects the default value for unauthorized consumption, a data grading of 5 is automatically assigned, but not displayed on the Reporting Worksheet.

These costs include those for operations, maintenance and any annually incurred costs for long-term upkeep of the drinking water supply and distribution system. It should include the costs of day-to-day upkeep and long-term financing such as repayment of capital bonds for infrastructure expansion or improvement. Typical costs include employee salaries and benefits, materials, equipment, insurance, fees, administrative costs and all other costs that exist to sustain the drinking water supply. Depending upon water utility accounting procedures or regulatory agency requirements, it may be appropriate to include depreciation in the total of this cost. This cost should not include any costs to operate wastewater, biosolids or other systems outside of drinking water.

Apparent losses caused by accounting omissions, errant computer programming, gaps in policy, procedure, and permitting/activation of new accounts; and any type of data lapse that results in under-stated customer water consumption in summary billing reports.

Systematic Data Handling Errors result in a direct loss of revenue potential. Water utilities can find "lost" revenue by keying on this component.

Utilities typically measure water consumption registered by water meters at customer premises. The meter should be read routinely (ex: monthly) and the data transferred to the Customer Billing System, which generates and sends a bill to the customer. Data Transfer Errors result in the consumption value being less than the actual consumption, creating an apparent loss. Such error might occur from illegible and mis-recorded hand-written readings compiled by meter readers, inputting an incorrect meter register unit conversion factor in the automatic meter reading equipment, or a variety of similar errors.

Apparent losses also occur from Data Analysis Errors in the archival and data reporting processes of the Customer Billing System. Inaccurate estimates used for accounts that fail to produce a meter reading are a common source of error. Billing adjustments may award customers a rightful monetary credit, but do so by creating a negative value of consumption, thus under-stating the actual consumption. Account activation lapses may allow new buildings to use water for months without meter readings and billing. Poor permitting and construction inspection practices can result in a new building lacking a billing account, a water meter and meter reading; i.e., the customer is unknown to the utility's billing system.

Close auditing of the permitting, metering, meter reading, billing and reporting processes of the water consumption data trail can uncover data management gaps that create volumes of systematic data handling error. Utilities should routinely analyze customer billing records to detect data anomalies and quantify these losses. For example, a billing account that registers zero consumption for two or more billing cycles should be checked to explain why usage has seemingly halted. Given the revenue loss impacts of these losses, water utilities are well-justified in providing continuous oversight and timely correction of data transfer errors & data handling errors.

If the water auditor has not yet gathered detailed data or assessment of systematic data handling error, it is recommended that the auditor apply the default value of 0.25% of the the Billed Authorized Consumption volume. However, if the auditor has investigated the billing system and its controls, and has well validated data that indicates the volume from systematic data handling error is substantially higher or lower than that generated by the default value, then the auditor should enter a quantity that was derived from the utility investigations and select an appropriate grading. Note: negative values are not allowed for this audit component. If the auditor enters zero for this component then a grading of 1 will be automatically assigned.

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AWWA Free Water Audit Software v5.0 Definitions 34
Item Name Description
A
Unbilled metered
consumption
Unbilled
unmetered
consumption
Convert From…
Million Gallons (US) = 3.06888329 Acre-feet
Use of Option
Buttons
Variable
production cost
(applied to Real
Losses)
Volume from own
sources
Volume from own
sources: Master
meter and supply
error adjustment
1 The cost to produce and supply the next unit of water (e.g., $/million gallons). This cost is determined by calculating the summed unit costs for ground and surface water treatment and all power used for pumping from the source to the customer. It may also include other miscellaneous unit costs that apply to the production of drinking water. It should also include the unit cost of bulk water purchased as an import if applicable.

It is common to apply this unit cost to the volume of Real Losses. However, if water resources are strained and the ability to meet future drinking water demands is in question, then the water auditor can be justified in applying the Customer Retail Rate to the Real Loss volume, rather than applying the Variable Production Cost.

The Free Water Audit Software applies the Variable Production costs to Real Losses by default. However, the auditor has the option on the Reporting Worksheet to select the Customer Retail Cost as the basis for the Real Loss cost evaluation if the auditor determines that this is warranted.

The volume of water withdrawn (abstracted) from water resources (rivers, lakes, streams, wells, etc) controlled by the water utility, and then treated for potable water distribution. Most water audits are compiled for utility retail water distribution systems, so this volume should reflect the amount of treated drinking water that entered the distribution system. Often the volume of water measured at the effluent of the treatment works is slightly less than the volume measured at the raw water source, since some of the water is used in the treatment process. Thus, it is useful if flows are metered at the effluent of the treatment works. If metering exists only at the raw water source, an adjustment for water used in the treatment process should be included to account for water consumed in treatment operations such as filter backwashing, basin flushing and cleaning, etc. If the audit is conducted for a wholesale water agency that sells untreated water, then this quantity reflects the measure of the raw water, typically metered at the source.

An estimate or measure of the degree of inaccuracy that exists in the master (production) meters measuring the annual Volume from own Sources, and any error in the data trail that exists to collect, store and report the summary production data. This adjustment is a weighted average number that represents the collective error for all master meters for all days of the audit year and any errors identified in the data trail. Meter error can occur in different ways. A meter or meters may be inaccurate by under-registering flow (did not capture all the flow), or by over-registering flow (overstated the actual flow). Data error can occur due to data gaps caused by temporary outages of the meter or related instrumentation. All water utilities encounter some degree of inaccuracy in master meters and data errors in archival systems are common; thus a value of zero should not be entered. Enter a negative percentage or value for metered data under-registration; or, enter a positive percentage or value for metered data over-registration.

Any kind of Authorized Consumption which is neither billed or metered. This component typically includes water used in activities such as fire fighting, flushing of water mains and sewers, street cleaning, fire flow tests conducted by the water utility, etc. In most water utilities it is a small component which is very often substantially overestimated. It does NOT include water supplied to neighboring utilities (water exported) which is unmetered and unbilled – an unlikely case. This component has many sub-components of water use which are often tedious to identify and quantify. Because of this, and the fact that it is usually a small portion of the water supplied, it is recommended that the auditor apply the default value, which is 1.25% of the Water Supplied volume. Select the default percentage to enter this value.

If the water utility has carefully audited the unbilled, unmetered activities occurring in the system, and has well validated data that gives a value substantially higher or lower than the default volume, then the auditor should enter their own volume. However the default approach is recommended for most water utilities.

Note that a value of zero is not permitted, since all water utilities have some volume of water in this component occurring in their system.

The user may develop an audit based on one of three unit selections:
1) Million Gallons (US)
2) Megalitres (Thousand Cubic Metres)
3) Acre-feet
Once this selection has been made in the instructions sheet, all calculations are made on the basis of the chosen units. Should the user wish to make additional conversions, a unit converter is provided below (use drop down menus to select units from the yellow unit boxes):

Enter Units:

Units and
Conversions
(conversion factor = 3.06888328973723)
Metered consumption which is authorized by the water utility, but, for any reason, is deemed by utility policy to be unbilled. This might for example include metered water consumed by the utility itself in treatment or distribution operations, or metered water provided to civic institutions free of charge. It does not include water supplied to neighboring utilities (water exported) which may be metered but not billed.

Converts to…..

To use the default percent value choose this button To enter a value choose this button and enter the value in the cell to the right NOTE: For Unbilled Unmetered Consumption, Unauthorized Consumption and Systematic Data Handling Errors, a recommended default value can be applied by selecting the Percent option. The default values are based on fixed percentages of Water Supplied or Billed Authorized Consumption and are recommended for use in this audit unless the auditor has well validated data for their system. Default values are shown by purple cells, as shown in the example above.

If a default value is selected, the user does not need to grade the item; a grading value of 5 is automatically applied (however, this grade will not be displayed).

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AWWA Free Water Audit Software v5.0 Definitions 35
Item Name Description
A
Water exported
Water exported:

Master meter and
supply error
adjustment
Water imported
Water imported:

Master meter and
supply error
adjustment

WATER LOSSES
= apparent losses + real losses
Water Losses are the difference between Water Supplied and Authorized Consumption. Water losses can be considered as a total volume for the whole system, or for partial systems such as transmission systems, pressure zones or district metered areas (DMA); if one of these configurations are the basis of the water audit.

An estimate or measure of the volume in which the Water Imported volume is incorrect. This adjustment is a weighted average that represents the collective error for all of the metered and archived imported flow for all days of the audit year. Meter error can occur in different ways. A meter may be inaccurate by underregistering flow (did not capture all the flow), or by over-registering flow (overstated the actual flow). Error in the metered, archived data can also occur due to data gaps caused by temporary outages of the meter or related instrumentation. All water utilities encounter some level of meter inaccuracy, particularly if meters are aged and infrequently tested. Occasional errors also occur in the archived metered data. Thus, a value of zero should not be entered. Enter a negative percentage or value for metered data under-registration; or, enter a positive percentage or value for metered data over-registration. If regular meter accuracy testing is conducted on the meter(s) - which is usually conducted by the water utility selling the water - then the results of this testing can be used to help quantify the meter error adjustment.

An estimate or measure of the volume in which the Water Exported volume is incorrect. This adjustment is a weighted average that represents the collective error for all of the metered and archived exported flow for all days of the audit year. Meter error can occur in different ways. A meter may be inaccurate by underregistering flow (did not capture all the flow), or by over-registering flow (overstated the actual flow). Error in the metered, archived data can also occur due to data gaps caused by temporary outages of the meter or related instrumentation. All water utilities encounter some degree of error in their metered data, particularly if meters are aged and infrequently tested. Occasional errors also occur in the archived data. Thus, a value of zero should not be entered. Enter a negative percentage or value for metered data under-registration; or enter a positive percentage or value for metered data over-registration. If regular meter accuracy testing is conducted on the meter(s) - which is usually conducted by the water utility selling the water - then the results of this testing can be used to help quantify the meter error adjustment. Corrections to data gaps or other errors found in the archived data should also be included as a portion of this meter error adjustment.

The Water Imported volume is the bulk water purchased to become part of the Water Supplied volume. Typically this is water purchased from a neighboring water utility or regional water authority, and is metered at the custody transfer point of interconnection between the two water utilities. Usually the meter(s) are owned by the water supplier selling the water to the utility conducting the water audit. The water supplier selling the bulk water usually charges the receiving utility based upon a wholesale water rate.

The Water Exported volume is the bulk water conveyed and sold by the water utility to neighboring water systems that exists outside of their service area.

Typically this water is metered at the custody transfer point of interconnection between the two water utilities. Usually the meter(s) are owned by the water utility that is selling the water: i.e. the exporter. If the water utility who is compiling the annual water audit sells bulk water in this manner, they are an exporter of water.

Note: The Water Exported volume is sold to wholesale customers who are typically charged a wholesale rate that is different than retail rates charged to the retail customers existing within the service area. Many state regulatory agencies require that the Water Exported volume be reported to them as a quantity separate and distinct from the retail customer billed consumption. For these reasons - and others - the Water Exported volume is always quantified separately from Billed Authorized Consumption in the standard water audit. Be certain not to "double-count" this quantity by including it in both the Water Exported box and the Billed Metered Consumption box of the water audit Reporting Worksheet. This volume should be included only in the Water Exported box.

Find
Find
Find
Find
Find
AWWA Free Water Audit Software v5.0 Definitions 36
Water Audit Report for:

Reporting Year: 15/16
Data Validity Score: 73
Functional Focus
Area
Audit Data Collection
Short-term loss control
Long-term loss control
Target-setting
Benchmarking
AWWA Free Water Audit Software:

Determining Water Loss Standing
For validity scores of 50 or below, the shaded blocks should not be focus areas until better data validity is achieved.

Preliminary Comparisons - can
begin to rely upon the
Infrastructure Leakage Index (ILI)
for performance comparisons for
real losses (see below table)
Performance Benchmarking - ILI
is meaningful in comparing real
loss standing
Identify Best Practices/ Best in
class - the ILI is very reliable as a
real loss performance indicator
for best in class service
Research information on leak
detection programs. Begin
flowcharting analysis of customer
billing system
Level II (26-50) Level V (91-100)
Analyze business process for
customer metering and billing
functions and water supply
operations. Identify data gaps.

Stay abreast of improvements in
metering, meter reading, billing,
leakage management and
infrastructure rehabilitation
Conduct loss assessment
investigations on a sample
portion of the system: customer
meter testing, leak survey,
unauthorized consumption, etc.

Establish ongoing mechanisms
for customer meter accuracy
testing, active leakage control
and infrastructure monitoring
Refine, enhance or expand
ongoing programs based upon
economic justification
Launch auditing and loss control
team; address production
metering deficiencies
Evaluate and refine loss control
goals on a yearly basis
Begin to assess long-term needs
requiring large expenditure:
customer meter replacement,
water main replacement program,
new customer billing system or
Automatic Meter Reading (AMR)
system.

Begin to assemble economic
business case for long-term
needs based upon improved data
becoming available through the
water audit process.

Conduct detailed planning,
budgeting and launch of
comprehensive improvements for
metering, billing or infrastructure
management
Continue incremental
improvements in short-term and
long-term loss control
interventions
Establish long-term apparent and
real loss reduction goals (+10
year horizon)
Establish mid-range (5 year
horizon) apparent and real loss
reduction goals
City of Corona Department of Water and Power
7/2015 - 6/2016
Water Loss Control Planning Guide
Establish/revise policies and
procedures for data collection
Refine data collection practices
and establish as routine business
process
Annual water audit is a reliable
gauge of year-to-year water
efficiency standing
Level III (51-70) Level IV (71-90)
Water Audit Data Validity Level / Score
Level I (0-25)
American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
AWWA Free Water Audit Software v5.0 Loss Control Planning 37 Target ILI Range

1.0 - 3.0
>3.0 -5.0
>5.0 - 8.0
Greater than 8.0
Less than 1.0
Water resources are believed to be sufficient to meet long-term needs, but demand management interventions (leakage management, water conservation) are included in the long-term planning. Water resources are plentiful, reliable, and easilyextracted.

Although operational and financial considerations may allow a long-term ILI greater than 8.0, such a level of leakage is not an effective utilization of water as a resource. Setting a target level greater than 8.0 - other than as an incremental goal to a smaller long-term target - is discouraged.If the calculated Infrastructure Leakage Index (ILI) value for your system is 1.0 or less, two possibilities exist. a) you are maintaining your leakage at low levels in a class with the top worldwide performers in leakage control. b) A portion of your data may be flawed, causing your losses to be greatly understated. This is likely if you calculate a low ILI value but do not employ extensive leakage control practices in your operations. In such cases it is beneficial to validate the data by performing field measurements to confirm the accuracy of production and customer meters, or to identify any other potential sources of error in the data.

Water resources can be developed or purchased at reasonable expense; periodic water rate increases can be feasibly imposed and are tolerated by the customer population.Cost to purchase or obtain/treat water is low, as are rates charged to customers.

Existing water supply infrastructure capability is sufficient to meet long-term demand as long as reasonable leakage management controls are in place.Superior reliability, capacity and integrity of thewater supply infrastructure make it relatively immune to supply shortages.

Financial Considerations
Once data have been entered into the Reporting Worksheet, the performance indicators are automatically calculated. How does a water utility operator know how well his or her system is performing? The AWWA Water Loss Control Committee provided the following table to assist water utilities is gauging an approximate Infrastructure Leakage Index (ILI) that is appropriate for their water system and local conditions. The lower the amount of leakage and real losses that exist in the system, then the lower the ILI value will be.

Note: this table offers an approximate guideline for leakage reduction target-setting. The best means of setting such targets include performing an economic assessment of various loss control methods. However, this table is useful if such an assessment is not possible.

Water resources are costly to develop or purchase; ability to increase revenues via water rates is greatly limited because of regulation or low ratepayer affordability.

Water Resources Considerations
Available resources are greatly limited and are very
difficult and/or environmentally unsound to develop. Operational Considerations Operating with system leakage above this level would require expansion of existing infrastructure and/or additional water resources to meet the demand.

General Guidelines for Setting a Target ILI
(without doing a full economic analysis of leakage control options) AWWA Free Water Audit Software v5.0 Loss Control Planning 38 AWWA Free Water Audit Software:

Examples of Completed and Validated Audits American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
Example Audit 1a:

Example 1a: Million Gallons: Example 1b: Million Gallons: Example 2a: Megalitres:

Reporting Worksheet
Example 2b: Megalitres:

Reporting Worksheet
AWWA Free Water Audit Software v5.0 Example Audits 39
Example Audit 1b:

AWWA Free Water Audit Software v5.0 Example Audits 40
Example Audit 2a:

AWWA Free Water Audit Software v5.0 Example Audits 41
Example Audit 2b:

AWWA Free Water Audit Software v5.0 Example Audits 42
DEVELOPED BY: Andrew Chastain-Howley, PG*, MCSM. Black & Veatch Will J. Jernigan, P.E. Cavanaugh & Associates, P.A.George Kunkel, P.E. Philadelphia Water Department Alain Lalonde, P.Eng. Master Meter Canada Inc.

Ralph Y. McCord, P.E. Louisville Water CompanyDavid A. Sayers Delaware River Basin CommissionBrian M. Skeens, P.E. CH2M HILLReinhard Sturm Water Systems Optimization, Inc.John H. Van Arsdel M.E. Simpson Company, Inc.

REFERENCES:

AWWA Free Water Audit Software:

Acknowledgements
- Alegre, H., Hirner, W., Baptista, J. and Parena, R. Performance Indicators for Water Supply Services. IWA Publishing ‘Manual of Best Practice’ Series, 2000. ISBN 1 900222 272- Kunkel, G. et al, 2003. Water Loss Control Committee Report: Applying Worldwide Best Management Practices in Water Loss Control. Journal AWWA, 95:8:65- AWWA Water Audits and Loss Control Programs, M36 Publication, 3 rd Edition, 2009 - Service Connection Diagrams courtesy of Ronnie McKenzie, WRP Pty Ltd.

AWWA Water Audit Software Version 5.0 Developed by the Water Loss Control Committee of the American Water Works Association August, 2014
This software is intended to serve as a basic tool to compile a preliminary, or “top-down”, water audit. It is recommended that users also refer to the current edition of the AWWA M36 Publication, Water Audits and Loss Control Programs, for detailed guidance on compiling a comprehensive, or “bottom-up”, water audit using the same water audit methodology.

American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
www.awwa.org
AWWA Free Water Audit Software v5.0 Acknowledgements 43 VERSION HISTORY:

Version: Release Date: Number of Worksheets:
v1 2005/ 2006 5
v2 2006 5v3 2007 7
v4 - v4.2 2010 10
v5 2014 12
In v5, changes were made to the way Water Supplied information is entered into software, with each major component having a corresponding Master Meter Error Adjustment entry (and data grading requirement). This required changes to the data validity score calculation; v5 of the software uses a weighting system that is, in part, proportional to the volume of input components. The Grading Matrix was updated to reflect the new audit inputs and also to include clarifications and additions to the scale descriptions.

The appearance of the software was updated in v5 to make the software more user-friendly and several new features were added to provide more feedback to the user. Notably, a dashboard tab has been added to provide more visual feedback on the water audit results and associated costs of Non-Revenue Water. A comments sheet was added to allow the user to track notes, comments and to cite sources used.

Key Features and Developments
The AWWA Water Audit Software was piloted in 2005 (v1.0 beta). The early versions (1.x) of the software restricted data entry to units of Million Gallons per year. For each entry into the audit, users identified whether the input was measured or estimated.

The most significant enhancement in v2 of the software was to allow the user to choose the volumetric units to be used in the audit, Million Gallons or Thousand Cubic Metres (megalitres) per year. Two financial performance indicators were added to provide feedback to the user on the cost of Real and Apparent losses. In v3, the option to report volumetric units in acre-feet was added. Another new feature in v3 was the inclusion of default values for two water audit components (unbilled unmetered and unauthorized consumption). v3 also included two examples of completed audits in units of million gallons and Megalitres. Several checks were added into v3 to provide instant feedback to the user on common data entry problems, in order to help the user complete an accurate water audit. v4 (and versions 4.x) of the software included a new approach to data grading. The simple "estimated" or "measured" approach was replaced with a more granular scale (typically 1-10) that reflected descriptions of utility practices and served to describe the confidence and accuracy of the input data. Each input value had a corresponding scale fully described in the Grading Matrix tab.

The Grading Matrix also showed the actions required to move to a higher grading score. Grading descriptions were available on the Reporting Worksheet via a pop-up box next to each water audit input. A water audit data validity score is generated (max = 100) and priority areas for attention (to improve audit accuracy) are identified, once a user completes the requied data grading. A service connection diagram was also added to help users understand the impact of customer service line configurations on water losses and how this information should be entered into the water audit software. An acknoweldgements section was also added. Minor bug fixes resulted in the release of versions 4.1 and 4.2. A French language version was also made available for v4.2.

AWWA Free Water Audit Software v5.0 Acknowledgements 44 Water Audit Report for:

Reporting Year: 15/16 7/2015 - 6/2016
Data Validity Score: 73
Water Exported Revenue Water
175.362 175.362
Billed Metered Consumption (water exported
is removed) Revenue Water
8,471.394
Own Sources Authorized
Consumption 8,471.394 Billed Unmetered Consumption 8,471.394

0.000
8,590.070 Unbilled Metered Consumption

0.000
5,628.983 118.676 Unbilled Unmetered Consumption
118.676
System Input Water Supplied Unauthorized Consumption 1,022.647 9,669.403 Apparent Losses 23.735
9,494.041 44.914 Customer Metering Inaccuracies

0.000
Systematic Data Handling Errors
Water Losses 21.178
Water Imported 903.971 Leakage on Transmission and/or Distribution Mains
Real Losses Not broken down
4,040.420 859.058 Leakage and Overflows at Utility's Storage Tanks
Not broken down
Leakage on Service Connections
Not broken down
AWWA Free Water Audit Software: Water Balance
Non-Revenue Water
(NRW)
Billed Authorized Consumption
Unbilled Authorized Consumption
(Adjusted for known
errors)
Billed Water Exported
City of Corona Department of Water and Power
WAS v5.0
American Water Works Association.

AWWA Free Water Audit Software v5.0 Water Balance 21
Water Audit Report for:

Reporting Year: 15/16 Show me the VOLUME of Non-Revenue Water Data Validity Score: 73 Show me the COST of Non-Revenue Water AWWA Free Water Audit Software:

Dashboard
7/2015 - 6/2016
City of Corona Department of Water and Power
0 200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
Cost $
Total Cost of NRW =$2,016,652
Unbilled metered (valued at Var. Prod. Cost)
Unbilled unmetered (valued at Var. Prod. Cost)
Unauth. consumption
Cust. metering inaccuracies
Syst. data handling errors
Real Losses (valued at Var. Prod. Cost)
WAS v5.0
American Water Works Association.

Water Exported
Authorized Consumption
Water Losses
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Water Exported
Water Imported
Volume From Own Sources
Water Exported
Billed Auth. Cons.

Unbilled Auth. Cons.

Apparent Losses
Real Losses
Water Exported
Revenue Water
Non Revenue Water
The graphic below is a visual representation of the
Water Balance with bar heights propotional to the
volume of the audit components
Water Exported
Water Supplied
AWWA Free Water Audit Software v5.0 Dashboard 22
Water Audit Report for: City of Corona (3310037)
Reporting Year:

System Attributes:

Apparent Losses: 689.524 acre-ft/yr
+ Real Losses: 1,144.093 acre-ft/yr
= Water Losses: 1,833.617 acre-ft/yr
Unavoidable Annual Real Losses (UARL): 1,139.50 acre-ft/yr Annual cost of Apparent Losses: $1,162,818
Annual cost of Real Losses: $698,640 Valued at Variable Production Cost Performance Indicators:

Non-revenue water as percent by volume of Water Supplied: 6.6% Non-revenue water as percent by cost of operating system: 4.3% Real Losses valued at Variable Production Cost Apparent Losses per service connection per day: 14.15 gallons/connection/day Real Losses per service connection per day: 23.47 gallons/connection/day Real Losses per length of main per day*: N/A
Real Losses per service connection per day per psi pressure: 0.25 gallons/connection/day/psi From Above, Real Losses = Current Annual Real Losses (CARL): 1,144.09 acre-feet/year

1.00 * This performance indicator applies for systems with a low service connection density of less than 32 service connections/mile of pipeline AWWA Free Water Audit Software:

System Attributes and Performance Indicators
*** YOUR WATER AUDIT DATA VALIDITY SCORE IS: 65 out of 100 *** Infrastructure Leakage Index (ILI) [CARL/UARL]:
16/17 7/2016 - 6/2017
Return to Reporting Worksheet to change this assumpiton ?
?
American Water Works Association.

WAS v5.0
Financial:

Operational Efficiency:

AWWA Free Water Audit Software v5.0 Performance Indicators 3 5 Name of Contact Person: All audit data are entered on the Reporting Worksheet Email Address: Value can be entered by user
Telephone | Ext.: 951 817-5762 Value calculated based on input data Name of City / Utility: These cells contain recommended default values City/Town/Municipality:

State / Province: Pcnt: Value:

Country: 0.25%
Year: 16/17 Financial Year
Start Date: 07/2016 Enter MM/YYYY numeric format
End Date: 06/2017 Enter MM/YYYY numeric format
Audit Preparation Date: 9/1/2017
Volume Reporting Units:

PWSID / Other ID:

If you have questions or comments regarding the software please contact us via email at: [email protected] AWWA Free Water Audit Software v5.0
City of Corona
The following worksheets are available by clicking the buttons below or selecting the tabs along the bottom of the page Corona
[email protected]
Auditors are strongly encouraged to refer to the most current edition of AWWA M36 Manual for Water Audits for detailed guidance on the water auditing process and targetting loss reduction levels This spreadsheet-based water audit tool is designed to help quantify and track water losses associated with water distribution systems and identify areas for improved efficiency and cost recovery. It provides a "top-down" summary water audit format, and is not meant to take the place of a full-scale, comprehensive water audit format. 3310037
US
Use of Option
(Radio) Buttons:

The spreadsheet contains several separate worksheets. Sheets can be accessed using the tabs towards the bottom of the screen, or by clicking the buttons below.

Melinda Weinrich
Acre-feet
Please begin by providing the following information The following guidance will help you complete the Audit California (CA)
American Water Works Association Copyright © 2014, All Rights Reserved.

Select the default percentage
by choosing the option button
on the left
To enter a value, choose
this button and enter a
value in the cell to the right
Instructions
The current sheet.

Enter contact
information and basic
audit details (year,
units etc)
Performance
Indicators
Review the
performance indicators
to evaluate the results
of the audit
Comments
Enter comments to
explain how values
were calculated or to
document data
sources
Water Balance
The values entered in
the Reporting
Worksheet are used to
populate the Water
Balance
Dashboard
A graphical summary
of the water balance
and Non-Revenue
Water components
Grading Matrix
Presents the possible
grading options for
each input component
of the audit
Service Connection
Diagram
Diagrams depicting
possible customer service
connection line
configurations
Acknowledgements
Acknowledgements for
the AWWA Free Water
Audit Software v5.0
Loss Control
Planning
Use this sheet to
interpret the results of
the audit validity score
and performance
indicators
Definitions
Use this sheet to
understand the terms
used in the audit
process
Example Audits
Reporting Worksheet
and Performance
Indicators examples
are shown for two
validated audits
Reporting Worksheet
Enter the required data
on this worksheet to
calculate the water
balance and data grading
AWWA Free Water Audit Software v5.0 Instructions 1
Water Audit Report for:

Reporting Year:

All volumes to be entered as: ACRE-FEET PER YEAR
Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 7 26,718.429 acre-ft/yr 8 acre-ft/yr Water imported: 7 2,525.068 acre-ft/yr 9 acre-ft/yr
Water exported: 5 378.049 acre-ft/yr 9 acre-ft/yr
Enter negative % or value for under-registration
WATER SUPPLIED: 28,856.241 acre-ft/yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 5 26,949.270 acre-ft/yr
Billed unmetered: n/a acre-ft/yr
Unbilled metered: 7 1.214 acre-ft/yr Pcnt: Value:

Unbilled unmetered: 5 72.141 acre-ft/yr 1.25% 24061 acre-ft/yr AUTHORIZED CONSUMPTION: 27,022.625 acre-ft/yr
WATER LOSSES (Water Supplied - Authorized Consumption) 1,833.617 acre-ft/yrApparent Losses Pcnt: Value:

Unauthorized consumption: 72.141 acre-ft/yr 0.25% acre-ft/yr Customer metering inaccuracies: 3 550.010 acre-ft/yr 2.00% acre-ft/yr Systematic data handling errors: 67.373 acre-ft/yr 0.25% acre-ft/yr Apparent Losses: 689.524 acre-ft/yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 1,144.093 acre-ft/yr WATER LOSSES: 1,833.617 acre-ft/yr

NON-REVENUE WATER
NON-REVENUE WATER: 1,906.971 acre-ft/yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 802.6 miles
Number of active AND inactive service connections: 7 43,510 Service connection density: 54 conn./mile main
Yes
Average length of customer service line: 30.0 ft
Average operating pressure: 5 93.6 psi

COST DATA
Total annual cost of operating water system: 10 $44,191,347 $/Year Customer retail unit cost (applied to Apparent Losses): 9 $3.87 Variable production cost (applied to Real Losses): 5 $610.65 $/acre-ft WATER AUDIT DATA VALIDITY SCORE: PRIORITY AREAS FOR ATTENTION: 1: Volume from own sources 2: Customer metering inaccuracies 3: Billed metered Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed 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

72.141
16/17 7/2016 - 6/2017
City of Corona (3310037)
<----------- Enter grading in column 'E' and 'J' ---------->

9.207
Based on the information provided, audit accuracy can be improved by addressing the following components:
$/100 cubic feet (ccf)
Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed *** YOUR SCORE IS: 65 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 ?????
? 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.
???
+
++
++
++
++
+
+
+
+ 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 Worksheet 2 Water Audit Report for: City of Corona (3310037)
Reporting Year:

System Attributes:

Apparent Losses: 689.524 acre-ft/yr
+ Real Losses: 1,144.093 acre-ft/yr
= Water Losses: 1,833.617 acre-ft/yr
Unavoidable Annual Real Losses (UARL): 1,139.50 acre-ft/yr Annual cost of Apparent Losses: $1,162,818
Annual cost of Real Losses: $698,640 Valued at Variable Production Cost Performance Indicators:

Non-revenue water as percent by volume of Water Supplied: 6.6% Non-revenue water as percent by cost of operating system: 4.3% Real Losses valued at Variable Production Cost Apparent Losses per service connection per day: 14.15 gallons/connection/day Real Losses per service connection per day: 23.47 gallons/connection/day Real Losses per length of main per day*: N/A
Real Losses per service connection per day per psi pressure: 0.25 gallons/connection/day/psi From Above, Real Losses = Current Annual Real Losses (CARL): 1,144.09 acre-feet/year

1.00 * This performance indicator applies for systems with a low service connection density of less than 32 service connections/mile of pipeline AWWA Free Water Audit Software:

System Attributes and Performance Indicators
*** YOUR WATER AUDIT DATA VALIDITY SCORE IS: 65 out of 100 *** Infrastructure Leakage Index (ILI) [CARL/UARL]:
16/17 7/2016 - 6/2017
Return to Reporting Worksheet to change this assumpiton ?
?
American Water Works Association.

WAS v5.0
Financial:

Operational Efficiency:

AWWA Free Water Audit Software v5.0 Performance Indicators 3 General Comment:

Audit Item Comment
Volume from own sources: Well 3 + Well 20 + Well 21 + Temescal Desalter Effluent + Lester Production + SDO Production. All raw sources. Magnetic meters are monitored daily in WIMS and SCADA.

Vol. from own sources: Master meter
error adjustment:

Water imported: (Treated) Mills WR-24 (Z3 + Z4 + Z5 + Bedford Meters) and Arlington Desalter. Magnetic meters are monitored daily in WIMS and SCADA.

Water imported: master meter error
adjustment:

Water exported: Norco Connection and Home Gardens. Magnetic meters are monitored daily in WIMS and SCADA.

Water exported: master meter error
adjustment:

Billed metered: Provided by Customer Care's CIS Infinity V3 software.

Billed unmetered:

Unbilled metered: Monthly Dead-end Hydrants =340,322 gallons. Quarterly Dead-end Hydrants = 8,608 gallons. Annual Dead-end Hydrants = 46,641 AWWA Free Water Audit Software:

User Comments
Use this worksheet to add comments or notes to explain how an input value was calculated, or to document the sources of the information used.

WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

AWWA Free Water Audit Software v5.0 Comments 4
Audit Item Comment
Unbilled unmetered:

Unauthorized consumption:

Customer metering inaccuracies:

Systematic data handling errors:

Length of mains: Engineering provided length of mains which includes all lateral lines. Information was calculated through GIS system.

Number of active AND inactive
service connections:

Value provided by Customer Care for Drinking Water Annual Report. Total Active Connections 41,810 + Total Other Connections (fire suppression, street cleaning, construction meters, temporary meters, line flushing) 1,225 + Total Inactive Connections 475 = 43,510.

Average length of customer service
line:

Average operating pressure: Engineering provided pressures from 6 distinct pressure zones. Pressure is monitored on critical infrastructure and PRVs throughout the system and recorded on SCADA, calculated average pressure range at all zones.

Total annual cost of operating water
system: Calculation provided by our finance division.

Customer retail unit cost (applied to
Apparent Losses): Calculation based on dividing total revenue by the total volume of billed consumption.

Variable production cost (applied to
Real Losses): Calculation provided by our finance division.

AWWA Free Water Audit Software v5.0 Comments 5
AWWA Free Water Audit Software:

Customer Service Line Diagrams
Average Length of Customer
Service Line
The three figures shown on this
worksheet display the
assignment of the Average
Length of Customer Service
Line, Lp, for the three most
common piping configurations.

Figure 1 shows the
configuration of the water meter
outside of the customer building
next to the curb stop valve. In
this configuration Lp = 0 since
the distance between the curb
stop and the customer metering
point is essentially zero.

Figure 2 shows the
configuration of the customer
water meter located inside the
customer building, where Lp is
the distance from the curb stop
to the water meter.

Figure 3 shows the
configuration of an unmetered
customer building , where Lp is
the distance from the curb stop
to the first point of customer
water consumption, or, more
simply, the building line.

In any water system the Lp will
vary notably in a community of
different structures, therefore
the average Lp value is used
and this should be
approximated or calculated if a
sample of service line
measurements has been
gathered.

Figure 1
Figure 2
Figure 3
American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
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AWWA Free Water Audit Software v5.0 Service Connection Diagram 31 Item Name
Apparent
Losses

AUTHORIZED

CONSUMPTION
Average length of
customer service
line
Average operating
pressure
Billed Authorized
Consumption
Billed metered
consumption
Billed unmetered
consumption
All consumption that is billed and authorized by the utility. This may include both metered and unmetered consumption. See "Authorized Consumption" for more information.
= unauthorized consumption + customer metering inaccuracies + systematic data handling errors Apparent Losses include all types of inaccuracies associated with customer metering (worn meters as well as improperly sized meters or wrong type of meter for the water usage profile) as well as systematic data handling errors (meter reading, billing, archiving and reporting), plus unauthorized consumption (theft or illegal use).

NOTE: Over-estimation of Apparent Losses results in under-estimation of Real Losses. Under-estimation of Apparent Losses results in over-estimation of Real Losses.

All metered consumption which is billed to retail customers, including all groups of customers such as domestic, commercial, industrial or institutional. It does NOT include water supplied to neighboring utilities (water exported) which is metered and billed. Be sure to subtract any consumption for exported water sales that may be included in these billing roles. Water supplied as exports to neighboring water utilities should be included only in the Water Exported component. The metered consumption data can be taken directly from billing records for the water audit period. The accuracy of yearly metered consumption data can be refined by including an adjustment to account for customer meter reading lag time since not all customer meters are read on the same day of the meter reading period. However additional analysis is necessary to determine the lag time adjustment value, which may or may not be significant.

All billed consumption which is calculated based on estimates or norms from water usage sites that have been determined by utility policy to be left unmetered.

This is typically a very small component in systems that maintain a policy to meter their customer population. However, this quantity can be the key consumption component in utilities that have not adopted a universal metering policy. This component should NOT include any water that is supplied to neighboring utilities (water exported) which is unmetered but billed. Water supplied as exports to neighboring water utilities should be included only in the Water Exported component.

AWWA Free Water Audit Software:

Definitions
Description
= billed water exported + billed metered + billed unmetered + unbilled metered + unbilled unmetered consumption The volume of metered and/or unmetered water taken by registered customers, the water utility's own uses, and uses of others who are implicitly or explicitly authorized to do so by the water utility; for residential, commercial, industrial and public-minded purposes.

Typical retail customers' consumption is tabulated usually from established customer accounts as billed metered consumption, or - for unmetered customers - billed unmetered consumption. These types of consumption, along with billed water exported, provide revenue potential for the water utility. Be certain to tabulate the water exported volume as a separate component and do not "double-count" it by including in the billed metered consumption component as well as the water exported component.

Unbilled authorized consumption occurs typically in non-account uses, including water for fire fighting and training, flushing of water mains and sewers, street cleaning, watering of municipal gardens, public fountains, or similar public-minded uses. Occasionally these uses may be metered and billed (or charged a flat fee), but usually they are unmetered and unbilled. In the latter case, the water auditor may use a default value to estimate this quantity, or implement procedures for the reliable quantification of these uses. This starts with documenting usage events as they occur and estimating the amount of water used in each event. (See Unbilled unmetered consumption)
This is the average length of customer service line, Lp, that is owned and maintained by the customer; from the point of ownership transfer to the customer water meter, or building line (if unmetered). The quantity is one of the data inputs for the calculation of Unavoidable Annual Real Losses (UARL), which serves as the denominator of the performance indicator: Infrastructure Leakage Index (ILI). The value of Lp is multiplied by the number of customer service connections to obtain a total length of customer owned piping in the system. The purpose of this parameter is to account for the unmetered service line infrastructure that is the responsibility of the customer for arranging repairs of leaks that occur on their lines. In many cases leak repairs arranged by customers take longer to be executed than leak repairs arranged by the water utility on utility-maintained piping. Leaks run longer - and lose more water - on customer-owned service piping, than utility owned piping.

If the customer water meter exists near the ownership transfer point (usually the curb stop located between the water main and the customer premises) this distance is zero because the meter and transfer point are the same. This is the often encountered configuration of customer water meters located in an underground meter box or "pit" outside of the customer's building. The Free Water Audit Software asks a "Yes/No" question about the meter at this location. If the auditor selects "Yes" then this distance is set to zero and the data grading score for this component is set to 10.

If water meters are typically located inside the customer premise/building, or properties are unmetered, it is up to the water auditor to estimate a system-wide average Lp length based upon the various customer land parcel sizes and building locations in the service area. Lp will be a shorter length in areas of high density housing, and a longer length in areas of low density housing and varied commercial and industrial buildings. General parcel demographics should be employed to obtain a composite average Lp length for the entire system.

Refer to the "Service Connection Diagram" worksheet for a depiction of the service line/metering configurations that typically exist in water utilities. This worksheet gives guidance on the determination of the Average Length, Lp, for each configuration.

This is the average pressure in the distribution system that is the subject of the water audit. Many water utilities have a calibrated hydraulic model of their water distribution system. For these utilities, the hydraulic model can be utilized to obtain a very accurate quantity of average pressure. In the absence of a hydraulic model, the average pressure may be approximated by obtaining readings of static water pressure from a representative sample of fire hydrants or other system access points evenly located across the system. A weighted average of the pressure can be assembled; but be sure to take into account the elevation of the fire hydrants, which typically exist several feet higher than the level of buried water pipelines. If the water utility is compiling the water audit for the first time, the average pressure can be approximated, but with a low data grading. In subsequent years of auditing, effort should be made to improve the accuracy of the average pressure quantity. This will then qualify the value for a higher data grading.

A
WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

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AWWA Free Water Audit Software v5.0 Definitions 32
Item Name Description
A
Customer
metering
inaccuracies
Customer retail
unit cost
Infrastructure
Leakage Index
(ILI)
Length of mains

NON-REVENUE
WATER
Number of active
AND inactive
service
connections
Real Losses
Revenue Water
Service
Connection
Density
= Apparent Losses + Real Losses + Unbilled Metered Consumption + Unbilled Unmetered Consumption. This is water which does not provide revenue potential to the utility.

Number of customer service connections, extending from the water main to supply water to a customer. Please note that this includes the actual number of distinct piping connections, including fire connections, whether active or inactive. This may differ substantially from the number of customers (or number of accounts). Note: this number does not include the pipeline leads to fire hydrants - the total length of piping supplying fire hyrants should be included in the "Length of mains" parameter.

Apparent water losses caused by the collective under-registration of customer water meters. Many customer water meters gradually wear as large cumulative volumes of water are passed through them over time. This causes the meters to under-register the flow of water. This occurrence is common with smaller residential meters of sizes 5/8-inch and 3/4 inch after they have registered very large cumulative volumes of water, which generally occurs only after periods of years. For meters sized 1-inch and larger - typical of multi-unit residential, commercial and industrial accounts - meter under-registration can occur from wear or from the improper application of the meter; i.e. installing the wrong type of meter or the wrong size of meter, for the flow pattern (profile) of the consumer. For instance, many larger meters have reduced accuracy at low flows. If an oversized meter is installed, most of the time the routine flow will occur in the low flow range of the meter, and a significant portion of it may not be registered. It is important to properly select and install all meters, but particularly large customer meters, size 1-inch and larger.

The auditor has two options for entering data for this component of the audit. The auditor can enter a percentage under-registration (typically an estimated value), this will apply the selected percentage to the two categories of metered consumption to determine the volume of water not recorded due to customer meter inaccuracy. Note that this percentage is a composite average inaccuracy for all customer meters in the entire meter population. The percentage will be multiplied by the sum of the volumes in the Billed Metered and Unbilled Metered components. Alternatively, if the auditor has substantial data from meter testing activities, he or she can calculate their own loss volumes, and this volume may be entered directly.

Note that a value of zero will be accepted but an alert will appear asking if the customer population is unmetered. Since all metered systems have some degree of inaccuracy, a positive value should be entered. A value of zero in this component is valid only if the water utility does not meter its customer population.

The Customer Retail Unit Cost represents the charge that customers pay for water service. This unit cost is applied routinely to the components of Apparent Loss, since these losses represent water reaching customers but not (fully) paid for. Since most water utilities have a rate structure that includes a variety of different costs based upon class of customer, a weighted average of individual costs and number of customer accounts in each class can be calculated to determine a single composite cost that should be entered into this cell. Finally, the weighted average cost should also include additional charges for sewer, storm water or biosolids processing, but only if these charges are based upon the volume of potable water consumed.

For water utilities in regions with limited water resources and a questionable ability to meet the drinking water demands in the future, the Customer Retail Unit Cost might also be applied to value the Real Losses; instead of applying the Variable Production Cost to Real Losses. In this way, it is assumed that every unit volume of leakage reduced by leakage management activities will be sold to a customer.

Note: the Free Water Audit Software allows the user to select the units that are charged to customers (either $/1,000 gallons, $/hundred cubic feet, or $/1,000 litres) and automatically converts these units to the units that appear in the "WATER SUPPLIED" box. The monetary units are United States dollars, $.

The ratio of the Current Annual Real Losses (Real Losses) to the Unavoidable Annual Real Losses (UARL). The ILI is a highly effective performance indicator for comparing (benchmarking) the performance of utilities in operational management of real losses.

Physical water losses from the pressurized system (water mains and customer service connections) and the utility’s storage tanks, up to the point of customer consumption. In metered systems this is the customer meter, in unmetered situations this is the first point of consumption (stop tap/tap) within the property. The annual volume lost through all types of leaks, breaks and overflows depends on frequencies, flow rates, and average duration of individual leaks, breaks and overflows.
=number of customer service connections / length of mains Length of all pipelines (except service connections) in the system starting from the point of system input metering (for example at the outlet of the treatment plant). It is also recommended to include in this measure the total length of fire hydrant lead pipe. Hydrant lead pipe is the pipe branching from the water main to the fire hydrant. Fire hydrant leads are typically of a sufficiently large size that is more representative of a pipeline than a service connection. The average length of hydrant leads across the entire system can be assumed if not known, and multiplied by the number of fire hydrants in the system, which can also be assumed if not known. This value can then be added to the total pipeline length. Total length of mains can therefore be calculated as:

Length of Mains, miles = (total pipeline length, miles) + [ {(average fire hydrant lead length, ft) x (number of fire hydrants)} / 5,280 ft/mile ] or
Length of Mains, kilometres = (total pipeline length, kilometres) + [ {(average fire hydrant lead length, metres) x (number of fire hydrants)} / 1,000 metres/kilometre ]
Those components of System Input Volume that are billed and have the potential to produce revenue.

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AWWA Free Water Audit Software v5.0 Definitions 33
Item Name Description
A
Systematic data
handling errors
Total annual cost
of operating the
water system
Unauthorized
consumption
Unbilled
Authorized
Consumption
Unavoidable
Annual Real
Losses (UARL)
UARL (gallons)=(5.41Lm + 0.15Nc + 7.5Lc) xP,
or
UARL (litres)=(18.0Lm + 0.8Nc + 25.0Lc) xP
where:

Lm = length of mains (miles or kilometres)
Nc = number of customer service connections
Lp = the average distance of customer service connection piping (feet or metres) (see the Worksheet "Service Connection Diagram" for guidance on deterring the value of Lp) Lc = total length of customer service connection piping (miles or km) Lc = Nc X Lp (miles or kilometres)
P = Pressure (psi or metres)
The UARL is a theoretical reference value representing the technical low limit of leakage that could be achieved if all of today's best technology could be successfully applied. It is a key variable in the calculation of the Infrastructure Leakage Index (ILI). Striving to reduce system leakage to a level close to the UARL is usually not needed unless the water supply is unusually expensive, scarce or both.

NOTE: The UARL calculation has not yet been proven as fully valid for very small, or low pressure water distribution systems. If, in gallons:
(Lm x 32) + Nc < 3000 or
P <35psi
in litres:
(Lm x 20) + Nc < 3000 or
P < 25m
then the calculated UARL value may not be valid. The software does not display a value of UARL or ILI if either of these conditions is true.

All consumption that is unbilled, but still authorized by the utility. This includes Unbilled Metered Consumption + Unbilled Unmetered Consumption. See "Authorized Consumption" for more information. For Unbilled Unmetered Consumption, the Free Water Audit Software provides the auditor the option to select a default value if they have not audited unmetered activities in detail. The default calculates a volume that is 1.25% of the Water Supplied volume. If the auditor has carefully audited the various unbilled, unmetered, authorized uses of water, and has established reliable estimates of this collective volume, then he or she may enter the volume directly for this component, and not use the default value.

Includes water illegally withdrawn from fire hydrants, illegal connections, bypasses to customer consumption meters, or tampering with metering or meter reading equipment; as well as any other ways to receive water while thwarting the water utility's ability to collect revenue for the water. Unauthorized consumption results in uncaptured revenue and creates an error that understates customer consumption. In most water utilities this volume is low and, if the water auditor has not yet gathered detailed data for these loss occurrences, it is recommended that the auditor apply a default value of 0.25% of the volume of water supplied. However, if the auditor has investigated unauthorized occurrences, and has well validated data that indicates the volume from unauthorized consumption is substantially higher or lower than that generated by the default value, then the auditor should enter a quantity that was derived from the utility investigations. Note that a value of zero will not be accepted since all water utilities have some volume of unauthorized consumption occurring in their system.

Note: if the auditor selects the default value for unauthorized consumption, a data grading of 5 is automatically assigned, but not displayed on the Reporting Worksheet.

These costs include those for operations, maintenance and any annually incurred costs for long-term upkeep of the drinking water supply and distribution system. It should include the costs of day-to-day upkeep and long-term financing such as repayment of capital bonds for infrastructure expansion or improvement. Typical costs include employee salaries and benefits, materials, equipment, insurance, fees, administrative costs and all other costs that exist to sustain the drinking water supply. Depending upon water utility accounting procedures or regulatory agency requirements, it may be appropriate to include depreciation in the total of this cost. This cost should not include any costs to operate wastewater, biosolids or other systems outside of drinking water.

Apparent losses caused by accounting omissions, errant computer programming, gaps in policy, procedure, and permitting/activation of new accounts; and any type of data lapse that results in under-stated customer water consumption in summary billing reports.

Systematic Data Handling Errors result in a direct loss of revenue potential. Water utilities can find "lost" revenue by keying on this component.

Utilities typically measure water consumption registered by water meters at customer premises. The meter should be read routinely (ex: monthly) and the data transferred to the Customer Billing System, which generates and sends a bill to the customer. Data Transfer Errors result in the consumption value being less than the actual consumption, creating an apparent loss. Such error might occur from illegible and mis-recorded hand-written readings compiled by meter readers, inputting an incorrect meter register unit conversion factor in the automatic meter reading equipment, or a variety of similar errors.

Apparent losses also occur from Data Analysis Errors in the archival and data reporting processes of the Customer Billing System. Inaccurate estimates used for accounts that fail to produce a meter reading are a common source of error. Billing adjustments may award customers a rightful monetary credit, but do so by creating a negative value of consumption, thus under-stating the actual consumption. Account activation lapses may allow new buildings to use water for months without meter readings and billing. Poor permitting and construction inspection practices can result in a new building lacking a billing account, a water meter and meter reading; i.e., the customer is unknown to the utility's billing system.

Close auditing of the permitting, metering, meter reading, billing and reporting processes of the water consumption data trail can uncover data management gaps that create volumes of systematic data handling error. Utilities should routinely analyze customer billing records to detect data anomalies and quantify these losses. For example, a billing account that registers zero consumption for two or more billing cycles should be checked to explain why usage has seemingly halted. Given the revenue loss impacts of these losses, water utilities are well-justified in providing continuous oversight and timely correction of data transfer errors & data handling errors.

If the water auditor has not yet gathered detailed data or assessment of systematic data handling error, it is recommended that the auditor apply the default value of 0.25% of the the Billed Authorized Consumption volume. However, if the auditor has investigated the billing system and its controls, and has well validated data that indicates the volume from systematic data handling error is substantially higher or lower than that generated by the default value, then the auditor should enter a quantity that was derived from the utility investigations and select an appropriate grading. Note: negative values are not allowed for this audit component. If the auditor enters zero for this component then a grading of 1 will be automatically assigned.

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AWWA Free Water Audit Software v5.0 Definitions 34
Item Name Description
A
Unbilled metered
consumption
Unbilled
unmetered
consumption
Convert From…
Million Gallons (US) = 3.06888329 Acre-feet
Use of Option
Buttons
Variable
production cost
(applied to Real
Losses)
Volume from own
sources
Volume from own
sources: Master
meter and supply
error adjustment
1 The cost to produce and supply the next unit of water (e.g., $/million gallons). This cost is determined by calculating the summed unit costs for ground and surface water treatment and all power used for pumping from the source to the customer. It may also include other miscellaneous unit costs that apply to the production of drinking water. It should also include the unit cost of bulk water purchased as an import if applicable.

It is common to apply this unit cost to the volume of Real Losses. However, if water resources are strained and the ability to meet future drinking water demands is in question, then the water auditor can be justified in applying the Customer Retail Rate to the Real Loss volume, rather than applying the Variable Production Cost.

The Free Water Audit Software applies the Variable Production costs to Real Losses by default. However, the auditor has the option on the Reporting Worksheet to select the Customer Retail Cost as the basis for the Real Loss cost evaluation if the auditor determines that this is warranted.

The volume of water withdrawn (abstracted) from water resources (rivers, lakes, streams, wells, etc) controlled by the water utility, and then treated for potable water distribution. Most water audits are compiled for utility retail water distribution systems, so this volume should reflect the amount of treated drinking water that entered the distribution system. Often the volume of water measured at the effluent of the treatment works is slightly less than the volume measured at the raw water source, since some of the water is used in the treatment process. Thus, it is useful if flows are metered at the effluent of the treatment works. If metering exists only at the raw water source, an adjustment for water used in the treatment process should be included to account for water consumed in treatment operations such as filter backwashing, basin flushing and cleaning, etc. If the audit is conducted for a wholesale water agency that sells untreated water, then this quantity reflects the measure of the raw water, typically metered at the source.

An estimate or measure of the degree of inaccuracy that exists in the master (production) meters measuring the annual Volume from own Sources, and any error in the data trail that exists to collect, store and report the summary production data. This adjustment is a weighted average number that represents the collective error for all master meters for all days of the audit year and any errors identified in the data trail. Meter error can occur in different ways. A meter or meters may be inaccurate by under-registering flow (did not capture all the flow), or by over-registering flow (overstated the actual flow). Data error can occur due to data gaps caused by temporary outages of the meter or related instrumentation. All water utilities encounter some degree of inaccuracy in master meters and data errors in archival systems are common; thus a value of zero should not be entered. Enter a negative percentage or value for metered data underregistration; or, enter a positive percentage or value for metered data over-registration.

Any kind of Authorized Consumption which is neither billed or metered. This component typically includes water used in activities such as fire fighting, flushing of water mains and sewers, street cleaning, fire flow tests conducted by the water utility, etc. In most water utilities it is a small component which is very often substantially overestimated. It does NOT include water supplied to neighboring utilities (water exported) which is unmetered and unbilled – an unlikely case. This component has many sub-components of water use which are often tedious to identify and quantify. Because of this, and the fact that it is usually a small portion of the water supplied, it is recommended that the auditor apply the default value, which is 1.25% of the Water Supplied volume. Select the default percentage to enter this value.

If the water utility has carefully audited the unbilled, unmetered activities occurring in the system, and has well validated data that gives a value substantially higher or lower than the default volume, then the auditor should enter their own volume. However the default approach is recommended for most water utilities.

Note that a value of zero is not permitted, since all water utilities have some volume of water in this component occurring in their system.

The user may develop an audit based on one of three unit selections:
1) Million Gallons (US)
2) Megalitres (Thousand Cubic Metres)
3) Acre-feet
Once this selection has been made in the instructions sheet, all calculations are made on the basis of the chosen units. Should the user wish to make additional conversions, a unit converter is provided below (use drop down menus to select units from the yellow unit boxes):

Enter Units:

Units and
Conversions
(conversion factor = 3.06888328973723)
Metered consumption which is authorized by the water utility, but, for any reason, is deemed by utility policy to be unbilled. This might for example include metered water consumed by the utility itself in treatment or distribution operations, or metered water provided to civic institutions free of charge. It does not include water supplied to neighboring utilities (water exported) which may be metered but not billed.

Converts to…..

To use the default percent value choose this button To enter a value choose this button and enter the value in the cell to the right NOTE: For Unbilled Unmetered Consumption, Unauthorized Consumption and Systematic Data Handling Errors, a recommended default value can be applied by selecting the Percent option. The default values are based on fixed percentages of Water Supplied or Billed Authorized Consumption and are recommended for use in this audit unless the auditor has well validated data for their system. Default values are shown by purple cells, as shown in the example above.

If a default value is selected, the user does not need to grade the item; a grading value of 5 is automatically applied (however, this grade will not be displayed).

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AWWA Free Water Audit Software v5.0 Definitions 35
Item Name Description
A
Water exported
Water exported:

Master meter and
supply error
adjustment
Water imported
Water imported:

Master meter and
supply error
adjustment

WATER LOSSES
= apparent losses + real losses
Water Losses are the difference between Water Supplied and Authorized Consumption. Water losses can be considered as a total volume for the whole system, or for partial systems such as transmission systems, pressure zones or district metered areas (DMA); if one of these configurations are the basis of the water audit.

An estimate or measure of the volume in which the Water Imported volume is incorrect. This adjustment is a weighted average that represents the collective error for all of the metered and archived imported flow for all days of the audit year. Meter error can occur in different ways. A meter may be inaccurate by underregistering flow (did not capture all the flow), or by over-registering flow (overstated the actual flow). Error in the metered, archived data can also occur due to data gaps caused by temporary outages of the meter or related instrumentation. All water utilities encounter some level of meter inaccuracy, particularly if meters are aged and infrequently tested. Occasional errors also occur in the archived metered data. Thus, a value of zero should not be entered. Enter a negative percentage or value for metered data under-registration; or, enter a positive percentage or value for metered data over-registration. If regular meter accuracy testing is conducted on the meter(s) - which is usually conducted by the water utility selling the water - then the results of this testing can be used to help quantify the meter error adjustment.

An estimate or measure of the volume in which the Water Exported volume is incorrect. This adjustment is a weighted average that represents the collective error for all of the metered and archived exported flow for all days of the audit year. Meter error can occur in different ways. A meter may be inaccurate by underregistering flow (did not capture all the flow), or by over-registering flow (overstated the actual flow). Error in the metered, archived data can also occur due to data gaps caused by temporary outages of the meter or related instrumentation. All water utilities encounter some degree of error in their metered data, particularly if meters are aged and infrequently tested. Occasional errors also occur in the archived data. Thus, a value of zero should not be entered. Enter a negative percentage or value for metered data under-registration; or enter a positive percentage or value for metered data over-registration. If regular meter accuracy testing is conducted on the meter(s) - which is usually conducted by the water utility selling the water - then the results of this testing can be used to help quantify the meter error adjustment. Corrections to data gaps or other errors found in the archived data should also be included as a portion of this meter error adjustment.

The Water Imported volume is the bulk water purchased to become part of the Water Supplied volume. Typically this is water purchased from a neighboring water utility or regional water authority, and is metered at the custody transfer point of interconnection between the two water utilities. Usually the meter(s) are owned by the water supplier selling the water to the utility conducting the water audit. The water supplier selling the bulk water usually charges the receiving utility based upon a wholesale water rate.

The Water Exported volume is the bulk water conveyed and sold by the water utility to neighboring water systems that exists outside of their service area.

Typically this water is metered at the custody transfer point of interconnection between the two water utilities. Usually the meter(s) are owned by the water utility that is selling the water: i.e. the exporter. If the water utility who is compiling the annual water audit sells bulk water in this manner, they are an exporter of water.

Note: The Water Exported volume is sold to wholesale customers who are typically charged a wholesale rate that is different than retail rates charged to the retail customers existing within the service area. Many state regulatory agencies require that the Water Exported volume be reported to them as a quantity separate and distinct from the retail customer billed consumption. For these reasons - and others - the Water Exported volume is always quantified separately from Billed Authorized Consumption in the standard water audit. Be certain not to "double-count" this quantity by including it in both the Water Exported box and the Billed Metered Consumption box of the water audit Reporting Worksheet. This volume should be included only in the Water Exported box.

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AWWA Free Water Audit Software v5.0 Definitions 36
Water Audit Report for:

Reporting Year: 16/17
Data Validity Score: 65
Functional Focus
Area
Audit Data Collection
Short-term loss control
Long-term loss control
Target-setting
Benchmarking
AWWA Free Water Audit Software:

Determining Water Loss Standing
For validity scores of 50 or below, the shaded blocks should not be focus areas until better data validity is achieved.

Preliminary Comparisons - can
begin to rely upon the
Infrastructure Leakage Index (ILI)
for performance comparisons for
real losses (see below table)
Performance Benchmarking - ILI
is meaningful in comparing real
loss standing
Identify Best Practices/ Best in
class - the ILI is very reliable as a
real loss performance indicator
for best in class service
Research information on leak
detection programs. Begin
flowcharting analysis of customer
billing system
Level II (26-50) Level V (91-100)
Analyze business process for
customer metering and billing
functions and water supply
operations. Identify data gaps.

Stay abreast of improvements in
metering, meter reading, billing,
leakage management and
infrastructure rehabilitation
Conduct loss assessment
investigations on a sample
portion of the system: customer
meter testing, leak survey,
unauthorized consumption, etc.

Establish ongoing mechanisms
for customer meter accuracy
testing, active leakage control
and infrastructure monitoring
Refine, enhance or expand
ongoing programs based upon
economic justification
Launch auditing and loss control
team; address production
metering deficiencies
Evaluate and refine loss control
goals on a yearly basis
Begin to assess long-term needs
requiring large expenditure:
customer meter replacement,
water main replacement program,
new customer billing system or
Automatic Meter Reading (AMR)
system.

Begin to assemble economic
business case for long-term
needs based upon improved data
becoming available through the
water audit process.

Conduct detailed planning,
budgeting and launch of
comprehensive improvements for
metering, billing or infrastructure
management
Continue incremental
improvements in short-term and
long-term loss control
interventions
Establish long-term apparent and
real loss reduction goals (+10
year horizon)
Establish mid-range (5 year
horizon) apparent and real loss
reduction goals
City of Corona (3310037)
7/2016 - 6/2017
Water Loss Control Planning Guide
Establish/revise policies and
procedures for data collection
Refine data collection practices
and establish as routine business
process
Annual water audit is a reliable
gauge of year-to-year water
efficiency standing
Level III (51-70) Level IV (71-90)
Water Audit Data Validity Level / Score
Level I (0-25)
American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
AWWA Free Water Audit Software v5.0 Loss Control Planning 37 Target ILI Range

1.0 - 3.0
>3.0 -5.0
>5.0 - 8.0
Greater than 8.0
Less than 1.0
Water resources are believed to be sufficient to meet long-term needs, but demand management interventions (leakage management, water conservation) are included in the long-term planning. Water resources are plentiful, reliable, and easilyextracted.

Although operational and financial considerations may allow a long-term ILI greater than 8.0, such a level of leakage is not an effective utilization of water as a resource. Setting a target level greater than 8.0 - other than as an incremental goal to a smaller long-term target - is discouraged.If the calculated Infrastructure Leakage Index (ILI) value for your system is 1.0 or less, two possibilities exist. a) you are maintaining your leakage at low levels in a class with the top worldwide performers in leakage control. b) A portion of your data may be flawed, causing your losses to be greatly understated. This is likely if you calculate a low ILI value but do not employ extensive leakage control practices in your operations. In such cases it is beneficial to validate the data by performing field measurements to confirm the accuracy of production and customer meters, or to identify any other potential sources of error in the data.

Water resources can be developed or purchased at reasonable expense; periodic water rate increases can be feasibly imposed and are tolerated by the customer population.Cost to purchase or obtain/treat water is low, as are rates charged to customers.

Existing water supply infrastructure capability is sufficient to meet long-term demand as long as reasonable leakage management controls are in place.Superior reliability, capacity and integrity of thewater supply infrastructure make it relatively immune to supply shortages.

Financial Considerations
Once data have been entered into the Reporting Worksheet, the performance indicators are automatically calculated. How does a water utility operator know how well his or her system is performing? The AWWA Water Loss Control Committee provided the following table to assist water utilities is gauging an approximate Infrastructure Leakage Index (ILI) that is appropriate for their water system and local conditions. The lower the amount of leakage and real losses that exist in the system, then the lower the ILI value will be.

Note: this table offers an approximate guideline for leakage reduction target-setting. The best means of setting such targets include performing an economic assessment of various loss control methods. However, this table is useful if such an assessment is not possible.

Water resources are costly to develop or purchase; ability to increase revenues via water rates is greatly limited because of regulation or low ratepayer affordability.

Water Resources Considerations
Available resources are greatly limited and are very
difficult and/or environmentally unsound to develop. Operational Considerations Operating with system leakage above this level would require expansion of existing infrastructure and/or additional water resources to meet the demand.

General Guidelines for Setting a Target ILI
(without doing a full economic analysis of leakage control options) AWWA Free Water Audit Software v5.0 Loss Control Planning 38 AWWA Free Water Audit Software:

Examples of Completed and Validated Audits American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
Example Audit 1a:

Example 1a: Million Gallons: Example 1b: Million Gallons: Example 2a: Megalitres:

Reporting Worksheet
Example 2b: Megalitres:

Reporting Worksheet
AWWA Free Water Audit Software v5.0 Example Audits 39
Example Audit 1b:

AWWA Free Water Audit Software v5.0 Example Audits 40
Example Audit 2a:

AWWA Free Water Audit Software v5.0 Example Audits 41
Example Audit 2b:

AWWA Free Water Audit Software v5.0 Example Audits 42
DEVELOPED BY: Andrew Chastain-Howley, PG*, MCSM. Black & Veatch Will J. Jernigan, P.E. Cavanaugh & Associates, P.A.George Kunkel, P.E. Philadelphia Water Department Alain Lalonde, P.Eng. Master Meter Canada Inc.

Ralph Y. McCord, P.E. Louisville Water CompanyDavid A. Sayers Delaware River Basin CommissionBrian M. Skeens, P.E. CH2M HILLReinhard Sturm Water Systems Optimization, Inc.John H. Van Arsdel M.E. Simpson Company, Inc.

REFERENCES: - Alegre, H., Hirner, W., Baptista, J. and Parena, R. Performance Indicators for Water Supply Services. IWA Publishing ‘Manual of Best Practice’ Series, 2000. ISBN 1 900222 272- Kunkel, G. et al, 2003. Water Loss Control Committee Report: Applying Worldwide Best Management Practices in Water Loss Control. Journal AWWA, 95:8:65- AWWA Water Audits and Loss Control Programs, M36 Publication, 3 rd Edition, 2009 - Service Connection Diagrams courtesy of Ronnie McKenzie, WRP Pty Ltd.

AWWA Water Audit Software Version 5.0 Developed by the Water Loss Control Committee of the American Water Works Association August, 2014
This software is intended to serve as a basic tool to compile a preliminary, or “top-down”, water audit. It is recommended that users also refer to the current edition of the AWWA M36 Publication, Water Audits and Loss Control Programs, for detailed guidance on compiling a comprehensive, or “bottom-up”, water audit using the same water audit methodology.

AWWA Free Water Audit Software:

Acknowledgements American Water Works Association. Copyright © 2014, All Rights Reserved.

WAS v5.0
www.awwa.org
AWWA Free Water Audit Software v5.0 Acknowledgements 43 VERSION HISTORY:

Version: Release Date: Number of Worksheets:
v1 2005/ 2006 5
v2 2006 5v3 2007 7
v4 - v4.2 2010 10
v5 2014 12
In v5, changes were made to the way Water Supplied information is entered into software, with each major component having a corresponding Master Meter Error Adjustment entry (and data grading requirement). This required changes to the data validity score calculation; v5 of the software uses a weighting system that is, in part, proportional to the volume of input components. The Grading Matrix was updated to reflect the new audit inputs and also to include clarifications and additions to the scale descriptions.

The appearance of the software was updated in v5 to make the software more user-friendly and several new features were added to provide more feedback to the user. Notably, a dashboard tab has been added to provide more visual feedback on the water audit results and associated costs of Non-Revenue Water. A comments sheet was added to allow the user to track notes, comments and to cite sources used.

Key Features and Developments
The AWWA Water Audit Software was piloted in 2005 (v1.0 beta). The early versions (1.x) of the software restricted data entry to units of Million Gallons per year. For each entry into the audit, users identified whether the input was measured or estimated.

The most significant enhancement in v2 of the software was to allow the user to choose the volumetric units to be used in the audit, Million Gallons or Thousand Cubic Metres (megalitres) per year. Two financial performance indicators were added to provide feedback to the user on the cost of Real and Apparent losses. In v3, the option to report volumetric units in acre-feet was added. Another new feature in v3 was the inclusion of default values for two water audit components (unbilled unmetered and unauthorized consumption). v3 also included two examples of completed audits in units of million gallons and Megalitres. Several checks were added into v3 to provide instant feedback to the user on common data entry problems, in order to help the user complete an accurate water audit.v4 (and versions 4.x) of the software included a new approach to data grading. The simple "estimated" or "measured" approach was replaced with a more granular scale (typically 1-10) that reflected descriptions of utility practices and served to describe the confidence and accuracy of the input data. Each input value had a corresponding scale fully described in the Grading Matrix tab. The Grading Matrix also showed the actions required to move to a higher grading score. Grading descriptions were available on the Reporting Worksheet via a pop-up box next to each water audit input. A water audit data validity score is generated (max = 100) and priority areas for attention (to improve audit accuracy) are identified, once a user completes the requied data grading. A service connection diagram was also added to help users understand the impact of customer service line configurations on water losses and how this information should be entered into the water audit software. An acknoweldgements section was also added. Minor bug fixes resulted in the release of versions 4.1 and 4.2. A French language version was also made available for v4.2.

AWWA Free Water Audit Software v5.0 Acknowledgements 44 Water Audit Report for:

Reporting Year: 16/17 7/2016 - 6/2017
Data Validity Score: 65
Water Exported Revenue Water
378.049 378.049
Billed Metered Consumption (water exported
is removed) Revenue Water
26,949.270
Own Sources Authorized
Consumption 26,949.270 Billed Unmetered Consumption 26,949.270

0.000
27,022.625 Unbilled Metered Consumption

1.214
26,709.222 73.355 Unbilled Unmetered Consumption

72.141
System Input Water Supplied Unauthorized Consumption 1,906.971 29,234.290 Apparent Losses 72.141
28,856.241 689.524 Customer Metering Inaccuracies
550.010
Systematic Data Handling Errors
Water Losses 67.373
Water Imported 1,833.617 Leakage on Transmission and/or Distribution Mains
Real Losses Not broken down
2,525.068 1,144.093 Leakage and Overflows at Utility's Storage Tanks
Not broken down
Leakage on Service Connections
Not broken down
AWWA Free Water Audit Software: Water Balance
Non-Revenue Water
(NRW)
Billed Authorized Consumption
Unbilled Authorized Consumption
(Adjusted for known
errors)
Billed Water Exported
City of Corona (3310037)
WAS v5.0
American Water Works Association.

AWWA Free Water Audit Software v5.0 Water Balance 21
Water Audit Report for:

Reporting Year: 16/17 Show me the VOLUME of Non-Revenue Water Data Validity Score: 65 Show me the COST of Non-Revenue Water AWWA Free Water Audit Software:

Dashboard
7/2016 - 6/2017
City of Corona (3310037)
0 100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
Cost $
Total Cost of NRW =$1,906,253
Unbilled metered (valued at Var. Prod. Cost)
Unbilled unmetered (valued at Var. Prod. Cost)
Unauth. consumption
Cust. metering inaccuracies
Syst. data handling errors
Real Losses (valued at Var. Prod. Cost)
WAS v5.0
American Water Works Association.

Water Exported
Authorized Consumption
Water Losses
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Water Exported
Water Imported
Volume From Own Sources
Water Exported Billed Auth. Cons.

Unbilled Auth. Cons. Apparent Losses
Real Losses
Water Exported
Revenue Water
Non Revenue Water
The graphic below is a visual representation of the
Water Balance with bar heights propotional to the
volume of the audit components
Water Exported
Water Supplied
AWWA Free Water Audit Software v5.0 Dashboard 22
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Volume from own sources:

Select this grading only if
the water utility
purchases/imports all of its
water resources (i.e. has
no sources of its own)
Less than 25% of water production
sources are metered, remaining
sources are estimated. No regular
meter accuracy testing or electronic
calibration conducted.
25% - 50% of treated water
production sources are metered;
other sources estimated. No regular
meter accuracy testing or electronic
calibration conducted.

Conditions between
2 and 4
50% - 75% of treated water
production sources are metered,
other sources estimated. Occasional
meter accuracy testing or electronic
calibration conducted.

Conditions between
4 and 6
At least 75% of treated water
production sources are metered, or at
least 90% of the source flow is derived
from metered sources. Meter
accuracy testing and/or electronic
calibration of related instrumentation is
conducted annually. Less than 25% of
tested meters are found outside of +/-
6% accuracy.

Conditions between
6 and 8
100% of treated water production
sources are metered, meter accuracy
testing and electronic calibration of
related instrumentation is conducted
annually, less than 10% of meters are
found outside of +/- 6% accuracy
Conditions between
8 and 10
100% of treated water production
sources are metered, meter accuracy
testing and electronic calibration of
related instrumentation is conducted
semi-annually, with less than 10% found
outside of +/- 3% accuracy. Procedures
are reviewed by a third party
knowledgeable in the M36 methodology.

Improvements to attain higher
data grading for "Volume from
own Sources" component:
to qualify for 2:

Organize and launch efforts to
collect data for determining volume
from own sources
to maintain 10:

Standardize meter accuracy test
frequency to semi-annual, or more
frequent, for all meters. Repair or
replace meters outside of +/- 3%
accuracy. Continually investigate/pilot
improving metering technology.

Volume from own sources
master meter and supply error
adjustment:

Select n/a only if the water
utility fails to have meters
on its sources of supply
Inventory information on meters and
paper records of measured volumes
exist but are incomplete and/or in a
very crude condition; data error
cannot be determined
No automatic datalogging of
production volumes; daily readings
are scribed on paper records without
any accountability controls. Flows
are not balanced across the water
distribution system: tank/storage
elevation changes are not employed
in calculating the "Volume from own
sources" component and archived
flow data is adjusted only when
grossly evident data error occurs.

Conditions between
2 and 4
Production meter data is logged
automatically in electronic format and
reviewed at least on a monthly basis
with necessary corrections
implemented. "Volume from own
sources" tabulations include estimate
of daily changes in tanks/storage
facilities. Meter data is adjusted
when gross data errors occur, or
occasional meter testing deems this
necessary.

Conditions between
4 and 6
Hourly production meter data logged
automatically & reviewed on at least a
weekly basis. Data is adjusted to
correct gross error when
meter/instrumentation equipment
malfunction is detected; and/or error is
confirmed by meter accuracy testing.

Tank/storage facility elevation changes
are automatically used in calculating a
balanced "Volume from own sources"
component, and data gaps in the
archived data are corrected on at least
a weekly basis.

Conditions between
6 and 8
Continuous production meter data is
logged automatically & reviewed each
business day. Data is adjusted to
correct gross error from detected
meter/instrumentation equipment
malfunction and/or results of meter
accuracy testing. Tank/storage facility
elevation changes are automatically
used in "Volume from own sources"
tabulations and data gaps in the
archived data are corrected on a daily
basis.

Conditions between
8 and 10
Computerized system (SCADA or
similar) automatically balances flows
from all sources and storages; results
are reviewed each business day. Tight
accountability controls ensure that all
data gaps that occur in the archived flow
data are quickly detected and corrected.

Regular calibrations between SCADA
and sources meters ensures minimal
data transfer error.

Improvements to attain higher
data grading for "Master meter
and supply error adjustment"
component:
to qualify for 2:

Develop a plan to restructure
recordkeeping system to capture all
flow data; set a procedure to review
flow data on a daily basis to detect
input errors. Obtain more reliable
information about existing meters by
conducting field inspections of
meters and related instrumentation,
and obtaining manufacturer
literature.
to maintain 10:

Monitor meter innovations for
development of more accurate and less
expensive flowmeters. Continue to
replace or repair meters as they
perform outside of desired accuracy
limits. Stay abreast of new and more
accurate water level instruments to
better record tank/storage levels and
archive the variations in storage volume.

Keep current with SCADA and data
management systems to ensure that
archived data is well-managed and error
free.

Water Imported:

Select n/a if the water
utility's supply is
exclusively from its own
water resources (no bulk
purchased/ imported
water)
Less than 25% of imported water
sources are metered, remaining
sources are estimated. No regular
meter accuracy testing.
25% - 50% of imported water
sources are metered; other sources
estimated. No regular meter
accuracy testing.

Conditions between
2 and 4
50% - 75% of imported water
sources are metered, other sources
estimated. Occasional meter
accuracy testing conducted.

Conditions between
4 and 6
At least 75% of imported water
sources are metered, meter accuracy
testing and/or electronic calibration of
related instrumentation is conducted
annually for all meter installations.

Less than 25% of tested meters are
found outside of +/- 6% accuracy.

Conditions between
6 and 8
100% of imported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted annually,
less than 10% of meters are found
outside of +/- 6% accuracy
Conditions between
8 and 10
100% of imported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted semiannually for all meter installations, with less than 10% of accuracy tests found
outside of +/- 3% accuracy.

Improvements to attain higher
data grading for "Water
Imported Volume" component:
(Note: usually the water
supplier selling the water - "the
Exporter" - to the utility being
audited is responsible to
maintain the metering
installation measuring the
imported volume. The utility
should coordinate carefully
with the Exporter to ensure
that adequate meter upkeep
takes place and an accurate
measure of the Water
Imported volume is quantified.)
to qualify for 2:

Review bulk water purchase
agreements with partner suppliers;
confirm requirements for use and
maintenance of accurate metering.

Identify needs for new or
replacement meters with goal to
meter all imported water sources.
to maintain 10:

Standardize meter accuracy test
frequency to semi-annual, or more
frequent, for all meters. Continue to
conduct calibration of related
instrumentation on a semi-annual basis.

Repair or replace meters outside of +/-
3% accuracy. Continually
investigate/pilot improving metering
technology.
to qualify for 4:

Locate all water production sources on maps and in the
field, launch meter accuracy testing for existing meters, begin to install meters on unmetered water production
sources and replace any obsolete/defective meters.

To qualify for 4:

Locate all imported water sources on maps and in the field, launch meter accuracy testing for existing meters, begin to install meters on unmetered imported water
interconnections and replace obsolete/defective meters. to qualify for 6:

Formalize annual meter accuracy testing for all imported water meters, planning for both regular meter accuracy
testing and calibration of the related instrumentation.

Continue installation of meters on unmetered imported water interconnections and replacement of obsolete/defective
meters.

AWWA Free Water Audit Software: Grading Matrix
The grading assigned to each audit component and the corresponding recommended improvements and actions are highlighted in yellow. Audit accuracy is likely to be improved by prioritizing those items shown in red to qualify for 6:

Refine computerized data collection and archive to include hourly production meter data that is reviewed at least on a weekly basis to detect specific data anomalies and gaps.

Use daily net storage change to balance flows in calculating "Water Supplied" volume. Necessary corrections to data
errors are implemented on a weekly basis.
to qualify for 8:

Ensure that all flow data is collected and archived on at least an hourly basis. All data is reviewed and detected errors corrected each business day. Tank/storage levels variations are employed in calculating balanced "Water Supplied"
component. Adjust production meter data for gross error and inaccuracy confirmed by testing.
to qualify for 10:

Link all production and tank/storage facility elevation change data to a Supervisory Control & Data Acquisition (SCADA) System, or similar computerized monitoring/control system, and establish automatic flow balancing algorithm and regularly calibrate between SCADA and source meters. Data is
reviewed and corrected each business day.
to qualify for 6:

Formalize annual meter accuracy testing for all source
meters; specify the frequency of testing. Complete
installation of meters on unmetered water production sources and complete replacement of all obsolete/defective meters. to qualify for 8:

Conduct annual meter accuracy testing and calibration of related instrumentation on all meter installations on a regular basis. Complete project to install new, or replace defective existing, meters so that entire production meter population is metered. Repair or replace meters outside of +/- 6%
accuracy.
to qualify for 10:

Maintain annual meter accuracy testing and calibration of related instrumentation for all meter installations. Repair or replace meters outside of +/- 3% accuracy. Investigate new meter technology; pilot one or more replacements with
innovative meters in attempt to further improve meter
accuracy.
to qualify for 4:

Install automatic datalogging equipment on production
meters. Complete installation of level instrumentation at all tanks/storage facilities and include tank level data in automatic calculation routine in a computerized system.

Construct a computerized listing or spreadsheet to archive input volumes, tank/storage volume changes and
import/export flows in order to determine the composite "Water Supplied" volume for the distribution system. Set a procedure to review this data on a monthly basis to detect gross anomalies and data gaps.

WATER SUPPLIED
to qualify for 10:

Conduct meter accuracy testing for all meters on a semiannual basis, along with calibration of all related instrumentation. Repair or replace meters outside of +/- 3% accuracy. Investigate new meter technology; pilot one or more replacements with innovative meters in attempt to improve meter accuracy.
to qualify for 8:

Complete project to install new, or replace defective, meters on all imported water interconnections. Maintain annual meter accuracy testing for all imported water meters and conduct calibration of related instrumentation at least annually. Repair or replace meters outside of +/- 6%
accuracy.

WAS 5.0
American Water Works Association. Copyright © 2014, All Rights Reserved.

AWWA Free Water Audit Software v5.0 Grading Matrix 23
Grading >>> n/a 1 2 3 4 5 6 7 8 9 10
Water imported master meter
and supply error adjustment:

Select n/a if the Imported
water supply is
unmetered, with Imported
water quantities estimated
on the billing invoices sent
by the Exporter to the
purchasing Utility.

Inventory information on imported
meters and paper records of
measured volumes exist but are
incomplete and/or in a very crude
condition; data error cannot be
determined Written agreement(s)
with water Exporter(s) are missing or
written in vague language
concerning meter management and
testing.

No automatic datalogging of
imported supply volumes; daily
readings are scribed on paper
records without any accountability
controls to confirm data accuracy
and the absence of errors and data
gaps in recorded volumes. Written
agreement requires meter accuracy
testing but is vague on the details of
how and who conducts the testing.

Conditions between
2 and 4
Imported supply metered flow data is
logged automatically in electronic
format and reviewed at least on a
monthly basis by the Exporter with
necessary corrections implemented.

Meter data is adjusted by the
Exporter when gross data errors are
detected. A coherent data trail exists
for this process to protect both the
selling and the purchasing Utility.

Written agreement exists and clearly
states requirements and roles for
meter accuracy testing and data
management.

Conditions between
4 and 6
Hourly Imported supply metered data
is logged automatically & reviewed on
at least a weekly basis by the Exporter.

Data is adjusted to correct gross error
when meter/instrumentation equipment
malfunction is detected; and to correct
for error confirmed by meter accuracy
testing. Any data gaps in the archived
data are detected and corrected during
the weekly review. A coherent data
trail exists for this process to protect
both the selling and the purchasing
Utility.

Conditions between
6 and 8
Continuous Imported supply metered
flow data is logged automatically &
reviewed each business day by the
Exporter. Data is adjusted to correct
gross error from detected
meter/instrumentation equipment
malfunction and/or results of meter
accuracy testing. Any data
errors/gaps are detected and
corrected on a daily basis. A data trail
exists for the process to protect both
the selling and the purchasing Utility.

Conditions between
8 and 10
Computerized system (SCADA or
similar) automatically records data
which is reviewed each business day by
the Exporter. Tight accountability
controls ensure that all error/data gaps
that occur in the archived flow data are
quickly detected and corrected. A
reliable data trail exists and contract
provisions for meter testing and data
management are reviewed by the selling
and purchasing Utility at least once
every five years.

Improvements to attain higher
data grading for "Water
imported master meter and
supply error adjustment"
component:
to qualify for 2:

Develop a plan to restructure
recordkeeping system to capture all
flow data; set a procedure to review
flow data on a daily basis to detect
input errors. Obtain more reliable
information about existing meters by
conducting field inspections of
meters and related instrumentation,
and obtaining manufacturer
literature. Review the written
agreement between the selling and
purchasing Utility.
to maintain 10:

Monitor meter innovations for
development of more accurate and less
expensive flowmeters; work with the
Exporter to help identify meter
replacement needs. Keep
communication lines with Exporters
open and maintain productive relations.

Keep the written agreement current with
clear and explicit language that meets
the ongoing needs of all parties.

Water Exported:

Select n/a if the water
utility sells no bulk water to
neighboring water utilities
(no exported water sales)
Less than 25% of exported water
sources are metered, remaining
sources are estimated. No regular
meter accuracy testing.
25% - 50% of exported water
sources are metered; other sources
estimated. No regular meter
accuracy testing.

Conditions between
2 and 4
50% - 75% of exported water
sources are metered, other sources
estimated. Occasional meter
accuracy testing conducted.

Conditions between
4 and 6
At least 75% of exported water sources
are metered, meter accuracy testing
and/or electronic calibration conducted
annually. Less than 25% of tested
meters are found outside of +/- 6%
accuracy.

Conditions between
6 and 8
100% of exported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted annually,
less than 10% of meters are found
outside of +/- 6% accuracy
Conditions between
8 and 10
100% of exported water sources are
metered, meter accuracy testing and
electronic calibration of related
instrumentation is conducted semiannually for all meter installations, with less than 10% of accuracy tests found
outside of +/- 3% accuracy.

Improvements to attain higher
data grading for "Water
Exported Volume" component:
(Note: usually, if the water
utility being audited sells
(Exports) water to a
neighboring purchasing Utility,
it is the responsibility of the
utility exporting the water to
maintain the metering
installation measuring the
Exported volume. The utility
exporting the water should
ensure that adequate meter
upkeep takes place and an
accurate measure of the
Water Exported volume is
quantified.)
to qualify for 2:

Review bulk water sales
agreements with purchasing utilities;
confirm requirements for use &
upkeep of accurate metering.

Identify needs to install new, or
replace defective meters as needed.
to maintain 10:

Standardize meter accuracy test
frequency to semi-annual, or more
frequent, for all meters. Repair or
replace meters outside of +/- 3%
accuracy. Continually investigate/pilot
improving metering technology.

Water exported master meter
and supply error adjustment:

Select n/a only if the water
utility fails to have meters
on its exported supply
interconnections.

Inventory information on exported
meters and paper records of
measured volumes exist but are
incomplete and/or in a very crude
condition; data error cannot be
determined Written agreement(s)
with the utility purchasing the water
are missing or written in vague
language concerning meter
management and testing.

No automatic datalogging of
exported supply volumes; daily
readings are scribed on paper
records without any accountability
controls to confirm data accuracy
and the absence of errors and data
gaps in recorded volumes. Written
agreement requires meter accuracy
testing but is vague on the details of
how and who conducts the testing.