Proposition 4 – Water Recycling

State Water Resources Control Board

The purpose of the funding is to provide technical and financial assistance to local agencies for the construction of water recycling projects that promote the beneficial use of treated municipal wastewater in order to augment fresh water supplies in California.

Jargon-free version

Helps local agencies in California pay for building water recycling projects using treated wastewater. Grants cover construction costs, with agencies contributing 50% of the project costs.

Quick Facts

Funding
$1 - $15,000,000
Deadline
Jun 30, 2030
Status
Accepting Applications
Category
Clean Energy & Environment
Organization
State Water Resources Control Board

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What Is This Program?

The purpose of the funding is to provide technical and financial assistance to local agencies for the construction of water recycling projects that promote the beneficial use of treated municipal wastewater in order to augment fresh water supplies in California. 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

What Benefits Are Offered?

granttechnical assistancefinancial assistance

Provides technical and financial assistance for the construction of water recycling projects that promote the beneficial use of treated municipal wastewater to augment fresh water supplies in California. Eligible uses include recycled water treatment, storage, distribution, pumping, groundwater recharge, indirect potable reuse, surface water augmentation, and large scale recycled water projects (which also cover planning and design costs). Grants are calculated at 35% of eligible construction costs up to $15 million per project. Requires 50% match funding. Excludes operation and maintenance costs.

Who Is Eligible?

Business Size: small, large

Industries: water treatment, wastewater management, environmental services, public utilities

Region: California

Demographics: Native American tribes

Other Criteria: 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, mutual water companies, eligible for non-disadvantaged communities, eligible for disadvantaged communities, eligible for severely disadvantaged communities

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🏆 Detailed Application Guide

📋What Are the Application Steps & Timeline?

📝Steps to Apply
  • Read the full grant guidelines
  • Prepare application materials
  • Submit application online
🌐Application Portal
https://www.grants.ca.gov/grants/proposition-4-water-recycling/
📤Submission Method
online
📅Key Dates
6/30/30 23:59Application deadline
June 30, 2030Expected award announcement
June 30, 2033Period of performance expires
🔄Intake Type
fixed-deadline

📄What Documents Are Required?

Required Documents
  • SF-424 (Application for Federal Assistance)
  • SF-424A (Budget Information - Non-Construction)
  • SF-424B (Assurances)
  • Project Narrative
  • Budget Narrative
  • Indirect cost rate agreement
📐Format Requirements
PDF only, max 10MB
✉️Supporting Letters
No letters of support required.

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💰What Expenses Are Eligible?

🧾Eligible Expenses
  • Construction costs
  • Planning
  • Design
  • Large Scale Recycled Water Projects
🚫Ineligible Expenses
  • Operation and maintenance costs
📏Expense Caps
Grant is calculated at 35% of eligible construction costs up to $15 million per project.
💳Payment Model
reimbursement
Retroactive Expenses Eligible
No

🤝Is Matching Funding Required?

🔀Matching Required
Yes
📊Matching Ratio
50%
🏦Eligible Matching Sources
  • cash
  • in-kind
📚Stacking Rules
No
🛡️Proof of Matching Required
Documentation of matching funds is required to prove the non-federal cost share.

📊What Are the Reporting Requirements?

🔍Audit Requirements
OMB Uniform Guidance Single Audit if the recipient expends $750,000 or more in federal awards in a fiscal year
🗄️Record Retention Period
3 years post-final-report

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FAQFrequently Asked Questions

This program is available to small, large businesses in water treatment, wastewater management, environmental services industries located in California.

This program offers funding up to $15,000,000 (minimum $1).

The application deadline is June 30, 2030.

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