Water Quality Combined Funding Program

State of Washington Department of Ecology

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Grant amount: Up to US $500,000

Anticipated deadline: Oct 15, 2020 5:00pm PDT

Applicant type: Government Entity Nonprofit Indigenous Group

Funding uses: Project / Program

Location of project: Washington

Location of residency: Washington

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Our Water Quality Combined Funding Program is an integrated funding program for projects that improve and protect water quality throughout the state. The program combines grants and loans from state and federal funding sources. We also provide technical assistance to program applicants to help them navigate this process.

We have one combined funding cycle, one application, one competitive rating process, and one list of funding offers. Applicants submit just one application for all of the funding sources under the Water Quality Combined Funding Program.

Funding sources of the Water Quality Combined Funding Program

Clean Water Act Section 319 Federal grants

EPA provides grants to Washington under Section 319 of the federal Clean Water Act. The state is required to provide a 40 percent match in funding. The Section 319 grant program offers funding to eligible nonpoint source pollution control projects, similar to the state Centennial Clean Water Program.

Centennial Clean Water Program grants

To improve and protect water quality, the state Centennial Clean Water Program provides grants for water quality infrastructure and nonpoint source pollution projects. Eligible infrastructure projects are limited to wastewater treatment construction projects for financially distressed communities. Eligible nonpoint projects include stream restoration and buffers, on-site septic repair and replacement, education and outreach, and other eligible nonpoint activities.

Clean Water State Revolving Fund loans

Provided by the federal Clean Water Act (CWA), the Clean Water State Revolving Fund (CWSRF) program is funded through an annual EPA capitalization grant, state matching funds, and principal and interest repayments on past program loans. The CWSRF program provides low-interest and forgivable principal loan funding for wastewater treatment construction projects, eligible nonpoint source pollution control projects, and eligible Green projects.

On-site Sewage Systems Program

This program provides funds to local governments to set up low-interest loan programs to repair or replace failing on-site sewage systems. Property owners unable to qualify for conventional bank loans and marine waterfront property owners can use the program get loans to fix or replace their systems where failures might directly affect Puget Sound. Both the Clean Water State Revolving Fund and the Centennial Clean Water Program provide funding for this program:

  • Clean Water State Revolving Fund (CWSRF) loans can be used by counties and cities to loan money to qualified land owners to repair or replace their failing on-site sewage systems.
  • Centennial Clean Water Program grant funds can help defray some of the operating costs and lending risks for these programs. Local governments can grant funds to cover operating costs for the program, provide small grants to property owners, and establish a loan-loss reserve account to cover their obligations should a property owner default on a loan.

Funding cycle

  • Amount of funding available: Varies based on the state budget — ranges from $100 million to $200 million annually.
  • Grant award limit: Varies depending on funding source and project type. See the current funding year guidelines below for more information.
  • Amount of matching funds required: Depends on the funding source you receive, can be up to 25 percent match required.
  • Funding dates: We accept applications from mid-August through mid-October each year

Applicants submit one application and depending on eligibility and priority, we award the best available funding from several different grants and loans (which could include a combination of grants and loans). Our funding comes from a mix of state and federal funds dedicated for water quality improvement and protection.

You can learn more about this opportunity by visiting the funder's website.


  • Who's eligible: 
    • Counties, cities, and towns
    • Tribal governments (federally recognized)
    • Special purpose districts
    • Conservation districts
    • Nonprofit organizations (only those qualify for section 319 grants)
  • Eligible project types


  • In general, projects or project components that do not have a direct water quality benefit are not eligible for funding.
  • Projects or project components prohibited by statute, federal appropriation, or administrative rules are also ineligible