The 604(b) Water Quality Grant Program provides funding for regional water quality management planning activities to regional planning organizations. Proposed projects must focus on planning efforts, not implementation. 

Program Goal: Improve surface water quality in Arizona

If the activities at your site or facility discharges pollutants to a protected Arizona surface water, you must have 

The 604(b) funds are for water quality management planning activities, such as:

• improving stormwater systems,
• determining ways to expand green infrastructure programs,
• determining the nature, extent and causes of point and nonpoint source water pollution problems, and developing plans to resolve these problems
• other water quality management planning projects

How to Apply

Download the Fiscal Year 2027 (FY27) application form, complete it, and then send it to the email address indicated on the form | View Application >

We are accepting applications through August 31, 2026

Available Funding

Over the past five years, ADEQ has awarded approximately $500,000 through the 604(b) grant program. Grant funds are provided as reimbursements to awardees who submit documentation of project accomplishments and eligible expenses to ADEQ. 

Funding for this program is provided by the U.S. Environmental Protection Agency (EPA). Funds may be awarded to a single recipient or distributed among multiple recipients, depending on project scope and funding availability. 

Eligible Applicants

• Regional planning agencies
• Council of governments
• Counties, conservation districts
• Cities and towns

Period of Performance

All 604(b) grant funds must be expended within the EPA fiscal year in which they are awarded. The EPA fiscal year runs from Oct. 1 through Sept. 30 of the following year.