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State Agency · State Water Resources Control Board

Proposition 4 – Water Recycling

Last updated: July 9, 2026

State Water Resources Control Board

Funding

Funding amount not specified

Closes

June 30, 2030

NAICS

236

Eligible Applicants: Local public agencies, 501(c)(3) nonprofit organizations qualified to do business in California, Public Utilities, Federally and non-federally recognized Native American tribes on the Native American Heritage Commission’s list, and Mutual water companies. Eligible Uses: Eligible projects include recycled water treatment; recycled water storage, distribution, and pumping; groundwater recharge; indirect potable reuse; surface water augmentation; and large scale recycled water projects. Ineligible Uses: Operation and maintenance costs. Eligible Costs: Construction Grant Funding - Construction costs only Construction Grant Funding - Large Scale Recycled Water Projects - Planning, Design, and Construction. Eligible Communities: All community types are eligible for funding. This includes small and large communities, non-disadvantaged, disadvantaged, and severely disadvantaged communities. For more information, please review the Water Recycling Funding Program (WRFP) Guidelines: https://www.waterboards.ca.gov/water_issues/programs/grants_loans/docs/wrfp_guidelines.pdf

Program Details

State Water Resources Control Board is a state agency that offers the Proposition 4 – Water Recycling grant program to support eligible programs and projects. This funding opportunity is available statewide and is administered by State Water Resources Control Board through California Grants Portal. Organizations seeking funding for eligible programs and projects should review the details below and confirm their eligibility before preparing an application.

Eligibility

Eligible applicants should review the full program requirements on California Grants Portal for specific eligibility restrictions. Organizations that meet the eligibility criteria are encouraged to apply and to review the full program guidelines before submission. Because eligibility rules and funding priorities can change between cycles, applicants should always confirm the current requirements with State Water Resources Control Board or on California Grants Portal before investing time in an application.

Funding and Timeline

The application deadline is June 30, 2030 (1452 days remaining). Applicants should allow sufficient time to gather required documentation, including organizational information, project descriptions, budgets, and supporting materials as specified in the program guidelines. Submitting a complete application well ahead of the deadline reduces the risk of disqualification on technical or administrative grounds.

Program Focus

This grant supports eligible programs and projects. This grant is associated with NAICS industry classifications: 236, 237, 238, 221310, 221320. Organizations operating in these sectors are encouraged to review eligibility. Funded projects are expected to demonstrate measurable outcomes aligned with the program's stated objectives. Grant recipients may be required to submit progress reports and final evaluations as a condition of the award, and to retain records for audit and compliance purposes.

How to Apply

Eligible organizations can apply through California Grants Portal. Create a free organization profile on GrantRegister to see whether this grant matches your organization's NAICS code, entity type, location, and focus area, and to receive a weekly digest of every open grant you qualify for.

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Eligibility

  • Programs related to construction
  • Programs related to water treatment
  • Programs related to wastewater

Award details

Applications close on June 30, 2030 (1452 days remaining).

Categories

Not categorized

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View application on California Grants Portal·Source: California Grants Portal·Last seen Jul 9, 2026

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