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Water quality

Ecology is responsible for keeping Washington waters clean and helping polluted waters recover.
Ecology is responsible for keeping Washington waters clean and helping polluted waters recover.

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229 results

Celebrating Ecology's clean water funding programs

The 2023-2025 biennium outcomes report is now available as an interactive story map, highlighting water quality improvements we funded between July 1, 2023, and June 30, 2025.

What We Do
No-till is a win-win-win for soil health, crop production, and clean water

No‑till farming — planting directly into last year’s crop residue — protects soil health, retains moisture, and keeps sediment out of the streams and rivers.

What We Do
Ecology-funded wastewater treatment plant project earns national recognition

We joined Lummi Nation, the U.S. Environmental Protection Agency (EPA), Tribal Council members, and others to celebrate the Gooseberry Point Wastewater Treatment Plant improvements. 

What We Do
When sewage spills happen, we have the data

Sometimes things happen with wastewater treatment and untreated or partially treated sewage can spill. We created a webpage to provide  information about sewage spills in your community.

What We Do
Study shows fecal bacteria levels have declined in the Snohomish River Basin

Sustained local efforts and clean water projects have reduced bacteria pollution in Snohomish County. 

Science
See an algal bloom, give it room

The only way to know if toxins are present is through laboratory testing. To keep yourself and your pets safe, avoid water with visible algae and follow all posted warnings and closures.

What You Can Do
Ecology proposes nutrient control requirements for three large wastewater treatment facilities

We invite you to comment on nutrient contol updates to wastewater treatment permits for King County’s West Point, the City of Everett, and the City of Bellingham.

What We Do
Going to the beach this summer? Check our safe swimming map to plan your trip

We are sampling 46 beaches for fecal bacteria contamination. Check the status of marine beaches before planning your next beach trip.

What You Can Do
Spokane River Toxics Reduction Grant supports clean water and healthier communities

This grant program is part of a larger multi-partner effort to reduce toxics and protect the health of the river through technical assistance, monitoring and research, and education and outreach.  

What We Do
Delivering tools for healthy water

Our 2025 Nonpoint Plan and Clean Water Guidance are published. 

Alerts

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