DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
ORDINANCE NO. 1738-NS
AN ORDINANCE OF THE CITY COUNCIL OF THE
CITY OF THOUSAND OAKS ADJUSTING AND
SETTING RATES, DISCHARGE LIMITS AND FEES
OF THE CITY WASTEWATER DIVISION
(UNCODIFIED)
WHEREAS, Section 5471 of the Health and Safety Code requires that rates and fees of the City Wastewater Division be adopted by City Council action; and
WHEREAS, clean water and good sanitation are essential to public health and safety and improve the quality of life for residents; and
WHEREAS, the City Council of the City of Thousand Oaks has adopted Ordinance No.1695-NS which establishes the authority for imposing discharge limits and charging fees for the Wastewater Division; and
WHEREAS, Thousand Oaks Municipal Code Section 10-1.701(d) provides for the escalation of plant investment fees and charges, this se ction stating that charges shall be adjusted biennially by a factor based upon the increase or decrease in the Engineering News Record (ENR)’s Construction Cost Index for Los Angeles based upon the change from t he preceding two (2) years’ July-to- July period; and
WHEREAS, the July 2023 ENR Constr uction Cost Index for Los Angeles was 15146.62, an increase of 15.90 percent from July 2021; and
WHEREAS, in the adoption of this Ordinance, the City of Thousand Oaks has followed the provisions of Governm ent Code Section 66000 et seq. relating to the setting of fees and charges that do not exceed the estimated reasonable cost of providing the services for which the fees or charges are made; and
WHEREAS, pursuant to Resolution No. 67-7, the City of Thousand Oaks established a Municipal Sewer District; and
WHEREAS, the adoption of Thousand Oaks Municipal Code (TOMC) sections 10-1.703, 10-1.901, 10-1.902, 10-1.908, and 10- 1.909, allows for the wastewater service charges for single-family residential properties to be collected on the Ventura County property tax roll; and
WHEREAS, Section 5473 of the Health and Safety Code requires that wastewater service charges collected on the Ventura County property tax roll be adopted by City Council action.
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
NOW, THEREFORE, the City Council of the City of Thousand Oaks DOES ORDAIN as follows:
PART 1
(Uncodified)
That Ordinance No. 1695-NS is hereby repeal ed to the extent inconsistent with this Ordinance, concurrent with the effective date of this Ordinance. Some of the wastewater fees, rates, charges, formulas, and related cost recovery matters are restated in this Ordinance and have not been modified or altered from the earlier Ordinance No. 1695-NS, therefore, the respective portions of the facility or capital improvement financial plans, operati ng expense reports and budgets, future facility needs and cost studies, City Council findings and nexus reports associated with the earlier ordinance ar e incorporated herein and re-approved by the City Council.
PART 2
(Uncodified)
That the following rates, charges, disc harge limits and fees ar e and shall be set for the City Wastewater Division in accord ance with Chapter 1 of Title 10 of the Thousand Oaks Municipal Code as follows:
I. Definitions
A. "Equivalent Residential Unit" (E RU) is a number which represents the discharge to the wastewater system which is equal to that from an average residential unit or 20 fixture units.
1. One ERU of average strength is equal to a discharge of 143 gallons per day.
2. One ERU for measured flow, i ndustrial flow, or high flow is equal to a discharge of 180 gallons per day.
B. "Plumbing Fixture Unit" (PFU) is a number assigned to various physical plumbing appurtenances. The unit count of each fixture type is based on the relation to the amount of waste contributed as determined by the Public Works Director.
C. "Service Unit" (SU) is a number which results from the multiplication of the number of ERU's by adjustment factors for the user group to reflect the strength and volume of the discharge from that user group. The discharge from the aver age residential user is defined as being equal to one service unit.
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
D. "Service Unit Rate" is the monthly charge per service unit established by City Council.
E. "Connection Charge Rate" is the connection charge per service unit established by City Council.
F. "Connection Charge" is the conn ection charge rate multiplied by the number of service units.
G. "Strength Factor" (SF) is a numbe r which converts the biochemical oxygen demand (BOD) and suspended solids (SS) of a discharge to a numerical value in proportion to average residential levels (BOD is equal to 290 mg/l and SS is equal to 290 mg/l) for the same variables.
H. "Flow Factor" (FF) is a number which converts the volume of a discharge to a numerical value in proportion to the volume of discharge for an average residential unit.
I. "Wastewater Service Charge" is the monthly charge which is the product of service units and the service unit rate.
J. "Kitchen" is an area equipped with permanent cooking and dish washing facilities for the regular preparation of meals.
K. "Bakery" is a large commerc ial operation which produces baked goods for wholesale purposes.
L. "Restaurant" is an establishm ent engaged in the retail sale of prepared food and drinks for on premises or immediate consumption. A "cafeteria" is similar in function and, with the exception of school facilities and non-commercial caterers, shall be deemed the same as a restaurant.
M. "School" is (1) a public or pr ivate educational in stitution with a campus which is dedicated to the instruction of children from kindergarten to twelfth grade, and (2) a public or private college or university with a campus which offers classes with a minimum duration of eight weeks.
N. "Market" is a large commercial operation with two or more of the following: seafood, produce, bakery, meat packaging/processing, or delicatessen.
O. "Condominium" means an estate in real property consisting of an undivided interest in a common portion of a parcel of real property, together with a separate interest in space in a building on such real property. A condominium may include, in addition, a separate interest in other portions of such real property.
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
II. In accordance with Section 10 -1.701, connection charges shall be determined as follows:
A. Connection Charge. Connection c harges shall be based upon the estimated flow, biochemical oxygen demand (BOD), and suspended solids (SS) of the discharge to the wastewater system.
1. Formula for Service Unit Determination:
SU = (ERU) x (Strength Factor) x (Flow Factor)
or
SU =(ERU) x Combined Factor)
Where:
SU = Service Unit
ERU = Equivalent Residential Unit
2. Strength and Flow Adjustment Factors for User Groups
a. Residential:
User Group Strength
Factor
Flow
Factor
Combined
Factor
Single-family detached home 1.0 1.0 1.0
Single-family detached condominium 1.0 1.0 1.0
Residential condominiums,
townhomes, mobile homes 1.0 0.8 0.8
Apartment, duplex, granny flat,
secondary unit, per dwelling unit 1.0 0.8 0.8
Motel, hotel, and congregate care
units, with kitchens per dwelling unit 1.0 0.8 0.8
b. Commercial:
User Group Strength
Factor
Flow
Factor
Combined
Factor
Bakery --- --- 1.81
Retail/Professional 1.0 1.0 1.0
Restaurant --- --- 1.81
Restaurant (grease traps) --- --- 1.19
School 0.71 0.75 0.535
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
Service Station 1.0 1.0 1.0
Church 1.0 1.0 1.0
Medical 1.0 1.0 1.0
Mortuary --- --- 1.82
Market --- --- 1.82
Major Retail 1.0 1.0 1.0
Motel, hotel, congregate care,
without kitchen per dwelling unit 1.0 1.0 1.0
Laundromat 1.0 1.0 1.0
All Others 1.0 1.0 1.0
c. Industrial:
User Group Strength
Factor
Flow
Factor
Combined
Factor
Non-regulated or normal volume
dischar
ge 1.0 1.0 1.0
d. Regulated Industrial Waste (as determined by the
Public Works Director) or high-volume discharge and car washes shall be calculated as follows:
Regulated Industrial
SU = Daily Flow x 0.67
180
Where:
SU = Service Unit
Daily Flow = Wastewater flow, gpd
High Flow (Car Wash)
SU = Daily Flow x 0.71
180
Where:
SU = Service Unit
Daily Flow = Wastewater flow, gpd
In determining the number of service units for car washes, the calculation should include:
(1) car wash discharges, and
(2) discharges from other plumbing fixtures on the property
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
All dischargers in this group shall be required to separately meter water used which is discharged to the wastewater
system. Meter can be public or private. Public meter requires payment of applicable fees.
The daily flow shall be based on data submitted by the user.
If actual flow exceeds this es timate by more than 25 percent in any subsequent one-year period as determined by metered water usage, the connection charge shall be recomputed, and the owner billed for additional charges due as a result of the higher-than-estimated flows. This provision shall apply to all industrial waste or high-volume dischargers and car washes where payment of wastewater connection charges was made on or after July 15, 1988.
Where the use of any discharger' s facilities/premises in this group is changed or modified such that the change or
modification requires approval by the Community
Development Department, then th e entire facilit y/premises shall be subject to the payment of additional connection fees as previously outlined.
e. Alternative Factors. The adjustment factors for other user groups shall be as dete rmined by the Public Works Director based on the volume and the strength of the
discharge in Paragraph A of this Section. The total volume of water used from public and private sources may be
determined by means of public or private meters, installed and maintained at the expense of the user and approved by the Public Works Director.
The formulas noted in a. thr ough d. above are procedures to attempt to accurately estimate flow and waste strength. If the Public Works Director determines that any of the above
applied procedures do not accurately represent the flow being discharged to the City sewe r system, the Public Works
Director may make a determinat ion to correct the flow
discrepancy in accordance with established engineering
practices.
3. Connection Charge Rate: The connection charge rate per service unit shall be:
On or after January 1, 2024
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
4. Connection Charge: The act ual connection charge shall be determined by multiply ing the number of service units by the connection charge rate per service unit.
5. Minimum Number of Plumbing Fixture Units:
a. For purposes of connection charge calculations, the
equivalent residential units for bakery, market, restaurant and mortuary categories shall be det ermined by using the actual number of installed fixture units with a minimum of 10
plumbing fixture units.
b. For purposes of connection charge calculations,
commercial users with a low volume of wastewater discharge and with ten (10) or less install ed plumbing fixture units shall be assigned one-half (1/2) of a service unit.
c. For purposes of connection charge calculations, all
other commercial users sha ll be charged using the actual number of installed plumbing fixture units, with a minimum of 20 plumbing fixture units.
6. Revisions to Service Unit Calculation:
a. If required by the Public Works Director, any non-
residential user may be required to submit the test results of an analysis performed by a certified laboratory on a
representative 24-hour composit e sample of a comparable wastewater discharge. The ana lysis shall be for BOD, SS and/or any other parameter(s) as may be required by the Public Works Director.
b. In the event a user belie ves that the strength and/or flow factors assigned are not ap plicable, said user may have a comparable wastewater disc harge analyzed by a certified laboratory. The Public Works Director shall review these results and may make an adjus tment to the strength and/or flow factors if the above-described submission is judged to be representative of t he user's anticipated wastewater strength and flow.
$11,135
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
c. All costs to obtain said wastewater analyses shall be arranged and paid for by the user.
B. Common Ownership. The charges set forth in this subsection shall apply, except for those buildings with a total floor area equal to or greater than 25,000 square feet. The provisi ons of the "Special Situations" subsection of this section shall t hen apply. Motels, hotels, and any other buildings on a parcel of land with a common ownership that cannot at some future date be divided shall be cons idered on an overall basis, and the minimum charge shall not apply to each individual building. Wastewater matters pertaining to non-residential condominiums shall be overseen by a property owners association. Such connection fees shall be paid at the appropriate commercial rate for a mini mum of twenty (20) fixture units within each separate building, and the twenty (20) minimum fixture unit count shall remain in use or available to the building. Transfer of fixture unit credits exceeding twenty (20) that are not in use may be transferred between non-residential condomini um units under the management authority of the property owners’ association. If additional fixture units must be purchased to accommodate the wastew ater disposal needs of a given non-residential condominium, such fi xtures shall be purchased by the owner association, considered appurt enant to the parent property of the association, and administered accordingly.
C. Escalation. In accordance with Section 10-1.701(d), all wastewater connection charges in this Ordinanc e shall be increased or decreased biennially.
D. Vested Maps. Development pr ojects with an approved vesting tentative map which had an application deemed complete by the City shall pay the indexed wastewater connec tion charge based on the complete date below, per service unit:
Prior to January 1, 2024 On or after January 1, 2024
$9,607 $11,135
Special Situations. For special situati ons such as combined-use buildings, multiple occupant developments, high volume discharges, or any other facilities where the c onnection charge computed in accordance with the connection charge subsection of this section does not, in the opinion of the Public Works Director, result in an equitable connection charge, said charge shall be determined based on the best available information and on current professional engineering practices. Such connection charge shall be based on criteria such as (but not limited to): environmental impact, National Pollution Discharge Elimination System requirements, water consumption, peak loading, residential equivalency, treatment plant capacity and capital
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
costs.
III. This section intentionally left blank.
IV. In accordance with Section 10- 1.703, monthly wastewater service charges shall be determined as follows:
A. Monthly Wastewater Service Charges. The charges shall be based upon the estimated flow, biochemical oxygen demand (BOD), and suspended solids (SS) of the discharge to the wastewater system.
1. Service Unit Determination Formula:
SU = (ERU) x (Strength Factor) x (Flow Factor)
or
SU =(ERU) x Combined Factor)
Where:
SU = Service Unit
ERU = Equivalent Residential Unit
2. Strength & Flow Adjustment Factors for User Groups:
a. Residential includes si ngle-family or detached
dwelling, condominium or to wnhouse, apartment, mobile
home, congregate care, and hot el/motel units with kitchens and be shall:
User Group Strength
Factor
Flow
Factor
Combined
Factor
Residential 1.0 1.0 1.0
b. Commercial includes 10 or more plumbing fixture
units and shall be:
User Group Strength
Factor
Flow
Factor
Combined
Factor
Bakery --- --- 1.81
Retail/Professional 1.0 1.0 1.0
Restaurant --- --- 1.81
Restaurant (grease traps) --- --- 1.19
School 0.71 0.75 0.535
Service Station 1.0 1.0 1.0
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
Church 1.0 1.0 1.0
Medical 1.0 1.0 1.0
Mortuary --- --- 1.82
Market --- --- 1.82
Major Retail 1.0 1.0 1.0
Motel, hotel, congregate care,
without kitchen per dwelling
unit
1.0 1.0 1.0
Laundromat 1.0 1.0 1.0
All Others 1.0 1.0 1.0
c. Industrial shall be:
User Group Strength
Factor
Flow
Factor
Combined
Factor
Non-regulated or normal
volume dischar
ge 1.0 1.0 1.0
d. Regulated Industrial Wa ste (as determined by the
Public Works Director) or high-volume discharge and car washes shall be:
Regulated Industrial:
SU = Daily Flow x 0.67
180
Where:
SU = Service Unit
Daily Flow = Wastewater flow, gpd
High Flow (Car Wash):
SU = Daily Flow x 0.71
180
Where:
SU = Service Unit
Daily Flow = Wastewater flow, gpd
In determining the number of service units for car washes, the calculation should include:
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
(1) car wash discharges, and
(2) the discharge from other plumbing fixtures on the
property.
e. Other User Groups: The adj ustment factors for other user groups shall be determined by the Public Works Director based on the volume and the strength of the discharge. The total volume of water used fr om public and private sources may be determined by means of public or private meters, installed and maintained at t he expense of the user and approved by the Public Works Director.
The formulas noted in a. through d. above are procedures to estimate flow and waste strength. If the Public Works
Director determines that an y of the above-applied
procedures do not accurately represent the flow being
discharged to the City sewer system, the Public Works
Director may make a determination to correct the flow
discrepancy in accordance with established engineering
practices.
3. Service Unit Rate and Wa stewater Service Charge:
a. The actual wastewater service charge shall be
determined by multiplying the number of service units by the service unit rate. The service unit rate shall be:
On or after July 1, 2024 On or after July 1, 2025
$35.28 $39.17
b. For a single-family residence, the monthly
wastewater service charge shall be:
On or after July 1, 2024 On or after July 1, 2025
$35.28 $39.17
c. The minimum monthly service charge for a property
for which wastewater service is provided shall be equal to the monthly wastewater service charge for a single-family
residence.
d. Pursuant to TOMC 10- 1.901, the Public Works
Director or Finance Director shall transmit the necessary
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
documents to the Ventura County Auditor-Controller
requesting that the wastewater service charges for single- family residences be incl uded on the Ventura County Tax Roll for FY 2024-25 and FY 2025-26. The charges, exclusive of applicable discounts, shall be:
4. Minimum Number of Plumbing Fixture Units: For purposes of service charge calculations, the equivalent residential units for bakery, market, restaurant and mortuary categories shall be determined by using the actual number of installed fixture units with a minimum of 10 plumbing fixture units. For all other categories, the minimum number of plumbing fixture units shall be 20.
5. Revisions to Service Unit Calculation:
a. If required by the Public Works Director, any non-
residential user may be required to submit the test results of an analysis performed by a certified laboratory on a
representative 24-hour composit e sample of wastewater
originating from said user. The analysis shall be for BOD, SS and/or any other parameter(s) as may be required by the Public Works Director.
b. In the event a user belie ves that the strength and/or flow factors assigned are not applicable, said user may have the wastewater discharge analyzed by a certified laboratory.
The Public Works Director shall review these results and may make an adjustment to the strength and/or flow factors if the above-described submission is judged to be a representative sample of the user's wastewater strength and flow.
c. All costs to obtain said wastewater analyses shall be arranged and paid for by the user.
B. Additional Service Charges.
1. Service Charge for Properties Outside City Limits: For wastewater service provided out side City limits, the service charge as determined in Paragraph (A) of this section shall be increased by:
On or after July 1, 2024 On or af ter July 1, 2025
Inside City $423.36 $470.04
Outside City $429.24 $476.64
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
On or after July 1, 2024 On or after July 1, 2025
$0.49 $0.55
2. Service Surcharge for Projec ts with Vesting Tentative Map Applications Deemed Complete: The difference between the indexed connection charge paid by a project with a complete vesting tentative map applicat ion and the full connection charge in effect for all other development projects shall be collected from the property owner in the form of a user service surcharge. The City shall collect the surcharge by adding an additional sum to the monthly or bimonthly
wastewater service bill for the property. The surcharge shall be collected over a period not to exceed 10 years and shall include an interest payment of 6.5% compounded annually.
The amount of the monthly or bimonthly surcharge shall
remain the same for the durati on of time that the surcharge is collected.
C. Charges for portions of mont hs. A property connected to the wastewater system for a portion of a billing period shall be billed for the portion of the period service is received.
D. Penalties. In accordance with Section 10-1.902, delinquent bills shall be assessed a basic penalty equal to ten (10%) percent of the unpaid water service charge. An additional penalty, equal to one half of one percent (0.5%) of the unpaid wastewater service charge shall be charged each month, or fraction thereof, that the wastew ater service charge and the basic penalty of the previous billing period remain unpaid.
V. In accordance with Section 10-1.706, the overhead rate is included in the approved fully burdened hourly rate.
VI. In accordance with Section 10-1.601, the following pollu tant discharge limits shall apply to all users of the wastewater system:
Constituent Daily Maximum
(mg/L)
Conventional
Ammonia as N 290
Biochemical oxygen demand (BOD5) 510
Chloride 160
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
Sulfate as SO4 930
Total dissolved solids (TDS) 2,000
Total suspended solids (TSS) 490
Metals (total recoverable)
Arsenic 0.17
Cadmium 0.075
Chromium 1.5
Copper 0.33
Lead 0.49
Mercury 0.0057
Molybdenum 0.72
Nickel 1.9
Selenium 0.28
Silver 1.0
Zinc 5.0
Other Constituents
Boron 1.0
Cyanide 0.086
A. Additional Requirements. No person shall discharge any wastewater:
1. Having a temperature hi gher than 140 degrees Fahrenheit (60 degrees Celsius).
2. Having a pH less than six (6 .0) or greater than eleven and one-half (11.5) standard units.
VII. Repeal of any provision of this Ordinance shall not affect any penalty, forfeiture, or liability incurred before, or preclude prosecuti on and imposition of penalties for any violation occurring befor e, this Ordinance's effective date. Any such repealed part shall remain in full force and effect for sustaining action or prosecuting violations occurring before the effective date of this Ordinance.
VIII. Any wastewater-related fees not se t forth in this Ordinance may be set forth in the User Fee Manual or other Ordinance or Resolution.
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
PART 3
Continuation
(Uncodified)
Repeal of any provision of Ordinance No.1695-NS herein shall not affect any penalty, forfeiture, or liability incu rred before, or prec lude prosecution and imposition of penalties for any violation occurring before, this Ordinance's effective date. Any such repealed part shall remain in full force and effect for sustaining action or prosecuting violations occurri ng before the effective date of this Ordinance.
PART 4
Severability
(Uncodified)
If any section, sentence, clauses, or phrase of this ordinance is for any reason held to be invalid or unconstituti onal by a decision of any court of competent jurisdiction, such decision shall not affect the validity of the remaining portions. The City Council hereby declare s that it would have passed this ordinance, and each section, sentence, clause, or phras e thereof, irrespective of the fact that any one or more sections, subsections, sentences, clause, or phrases be declared invalid or unconstitutional.
PART 5
Effective Date
This Ordinance shall take effect on the thirty-first (31st) day following its final passage and adoption.
PASSED AND ADOPTED this 26th day of August, 2025, by the following vote:
Ayes:
Noes:
Absent:
_______________________________
David Newman, Mayor
City of Thousand Oaks, California
ATTEST/CERTIFY:
_____________________________
Laura B. Maguire, City Clerk
Date Attested: _________________
DPW:610-10; 530-25;290-50\ev\Council\2025\070825\Sewer Use and Discharge Local Limits Ordinance Updates Att
2.docx
Ord. No. 1738-NS
APPROVED AS TO FORM:
Office of the City Attorney
_____________________________
Tracy M. Noonan, City Attorney
APPROVED AS TO ADMINISTRATION:
______________________________
Andrew P. Powers, City Manager
Introduced: July 8, 2025
Published: August 19, 2025 and
Ordinance No.: 1738-NS
The presence of electronic signature certifies t hat the foregoing is a true and correct copy as approved by the City of Thousand Oaks City Council on the date cited above.