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LA County Waterworks District 40 - Water Supply Reliability Charge

Levied by Los Angeles County Waterworks District No. 40, Antelope Valley (Board of Supervisors sitting as the governing body) on new development in Los Angeles County (unincorporated). Collected other: in full before the District will issue a Will-Serve Letter for new development.

What one house pays

$11,299

This fee is not in Los Angeles County (unincorporated)'s published figure. This site publishes a home outside any plan area, and this charge applies only in District 40, Antelope Valley. The amount shown is what it costs a house that is there.

Total one-time fees here
$48,349
Adjustment
Adjusts ENR construction cost index · January
what the document says

ENR Construction Cost Index (Los Angeles Region)

The record

Why it exists

“The Water Supply Reliability Charge is for the purpose of supplementing and firming up the water supplies of the District. This charge consists of three different fees: 1) Water Banking Fee; 2) Groundwater Supply Fee; and 3) Recycled Water Fee. These fees shall be collected in full by the District prior to issuance of a Will-Serve Letter for new development.”

Part 4, Rule 4-A-1t opening paragraph, p. 421, rev. 1/26 · source document ↗
What it pays for

“The purpose of the Water Banking Fee is to establish a water-banking program to store water in groundwater basins that would allow the District to provide its customers with reliable water supplies during emergencies or dry periods. ... The purpose of the Groundwater Supply Fee is for the construction of wells and associated facilities that may be used for the injection of treated surface water or the extraction of local groundwater when needed. ... The purpose of the Recycled Water Fee is to establish a recycled water program that will increase the reliability of the District's water supplies by decreasing reliance on imported water and local groundwater supplies.”

Part 4, Rule 4-A-1t paras 1, 2 and 3, pp. 421-423, rev. 1/26 · source document ↗
Where it applies

“The District is comprised of eight regions serving customers in the cities of Lancaster and Palmdale, and the unincorporated communities of Pearblossom, Littlerock, Sun Village, Rock Creek, Northeast Los Angeles County, and Lake Los Angeles.”

LA County Public Works, Waterworks Districts, "District Overview", District 40 - Antelope Valley entry · source document ↗
When it was adopted

2005-05-24

“4-A-1t Added. 05/24/05; Rev. 12/27/05; Rev. 1/1/07,1/08, 1/09, 1/3/11, 1/3/12, 1/13, 2/14, 3/15, 1/16, 1/17, 1/18, 3/19, 2/20, 6/20, 6/21, 1/22, 1/23, 1/24, 1/25, 1/26”

Rules and Regulations of the LA County Waterworks Districts and the Marina del Rey Water System, Part 4 - Schedule of Water Supply Charges, Section A, rule-history footer, p. 421; set "Last Revision Adopted July 2026" · source document ↗
When it is paid

other: in full before the District will issue a Will-Serve Letter for new development

“CONDITION OF EXECUTING WILL-SERVE LETTERS: As a condition of executing (1) Fire Flow Availability Form (2) Will-Serve Letter for Subdivision Water Systems; (3) Will-Serve Letter for Water Systems Serving Parcel Maps; or (4) Building and Safety Water Pressure Form, the District will require that the owner/developer pay the District's Water Supply Reliability Charge, as applicable, at that time and agree to pay all other charges prior to receiving water service. See Rule 4-A-1t for calculating the Water Supply Reliability Charge.”

Part 1 - General Conditions and Rules, Section D, Rule 1-D-5, p. 125; history "Added 4/22/75-Eff. 5/22/75, Rev. 7/15/93; Rev. 5/24/05" · source document ↗
Who collects it

“WHEREAS, the Los Angeles County Board of Supervisors as the governing body of the Los Angeles County Waterworks Districts pursuant to Section 55501 of the County Waterworks District Law, Water Code, is authorized to increase the water rates, surcharges, and water supply charges as adopted in the Rules and Regulations of the Los Angeles County Waterworks Districts and the Marina del Rey Water System pursuant to Section 55333”

Board of Supervisors, Enclosure B, "RESOLUTION OF THE BOARD OF SUPERVISORS OF THE COUNTY OF LOS ANGELES, CALIFORNIA, ADOPTING A SCHEDULE OF WATER RATE INCREASES ...", adopted 2025-12-16, p. 1 of 5 · source document ↗
Who is exempt

“All lands lying within the boundaries of the District that previously received or were receiving water service as of the indicated dates below, are subject to Water Supply Reliability Charge and applicable Local System Improvement (frontage) Charges, but exempt from Capital Improvement Charges.”

Part 4, Rule 4-A-1b, WATERWORKS DISTRICT NO. 40, ANTELOPE VALLEY (DISTRICT), p. 400, rev. 1/26 · source document ↗
Credits and offsets

“All or part of the fee may be waived, as determined by the District Engineer, for developments that acquire fully reliable new water supply entitlements. ... No credits shall be given for this fee." [Water Banking Fee] / "New development shall receive credit for up to current fee per billing unit to offset the Groundwater Supply Fee for the construction of eligible wells and associated facilities as determined by the District Engineer. All or part of the fee may be waived, as determined by the District Engineer." [Groundwater Supply Fee] / "No credits shall be given for this fee." [Recycled Water Fee]”

Part 4, Rule 4-A-1t paras 1, 2 and 3, pp. 421-423, rev. 1/26 · source document ↗

Every published rate

Every rate below applies to single-family detached.

ComponentBasisEffectiveAmount
Groundwater Supply Feeunverified per unit 1 Jan 2026 $5,943
the line this rate was read from

“2. Groundwater Supply Fee ... The dollar amount per Billing Unit shall be……………………... $5,942.69”

Part 4 - Schedule of Water Supply Charges, Section A, Rule 4-A-1t para 2, p. 422, rev. 1/26 · source document ↗
Water Banking Feeunverified per unit 1 Jan 2026 $2,975
the line this rate was read from

“1. Water Banking Fee ... The dollar amount per Billing Unit shall be…...…………..…... $2,974.71”

Part 4 - Schedule of Water Supply Charges, Section A, Rule 4-A-1t para 1, p. 421, rev. 1/26 · source document ↗
Recycled Water Feeunverified per unit 1 Jan 2026 $2,381
the line this rate was read from

“3. Recycled Water Fee ... The dollar amount per Billing Unit shall be………………………… $2,381.14”

Part 4 - Schedule of Water Supply Charges, Section A, Rule 4-A-1t para 3, p. 423, rev. 1/26 · source document ↗

About these figures

Quoted, not summarized. Every amount and fact on this page is copied from the official document it links to. If we couldn’t find something in a document, we leave it blank instead of guessing.

Before any discounts. Some fees offer credits, waivers or phase-ins. They’re listed above but not subtracted, because whether you qualify depends on your project.

Check the date. Fees change. This page shows what was in force on the date at the top, with a link to the document that set it, so you can confirm the current amount yourself. How all of this is put together.

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