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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Actualización del proyecto de Área de Gestión de Aguas Subterráneas

El agua que sale de su grifo debe ser potable y apta para cocinar. Por desgracia, esto no es así para algunos usuarios de pozos privados del valle bajo de Yakima.

Getting clean drinking water to the Lower Yakima Valley

We're partnering with local and state agencies to reduce nitrate contamination in the Lower Yakima Valley. Here's what you need to know if your well is impacted.

When pee is pollution

Puget Sound communities, Ecology, and our partners are working to reduce the amount of nutrient pollution in Puget Sound.  

West Point Treatment Plant water quality permit now issued

We've now issued the final permit for the West Point wastewater treatment plant in Seattle. It strengthens protective measures for Puget Sound with updates that match current water quality rules.

Looking back and looking forward on our beach monitoring season

Every summer we monitor beaches for fecal bacteria to protect beachgoers. Read our 2023 BEACH Program report and send us feedback on the proposed list of beaches that will be monitored in 2024.

Reflecting on World Water Day and protecting Washington’s freshwater resources

Celebrating World Water Day and reflecting on Ecology's role in protecting state freshwater resources

Seeking environmental technicians

We are seeking eight natural resource scientists to conduct river and stream surveys this summer. Learn more about our watershed health monitoring group and how you can join our team.

$386 million in clean water projects planned for Washington

We're proposing to award $386 million in grants and loans for 134 high-priority clean water projects across the state.

New opportunities to improve Washington’s water cleanup program

Update about a settlement that Ecology and EPA are in to review and improve the TMDL program. 

Clean water funding supports upgrades at Pasco facility

Ecology is supporting The City of Pasco’s Process Water Reuse Facility, with our clean water grants and loans program to help upgrade and expand the facility.