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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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.

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

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.

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.

When pee is pollution

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

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.

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.

Changing weather, changing water – it's time to look out for harmful algal blooms

It’s time to watch for harmful algal blooms! The only way to know for sure if toxins are present is through laboratory testing. Read on to learn more.

New paper about Contaminants of Emerging Concern in wastewater

New review paper gathers studies about Contaminants of Emerging Concern (CECs) entering Washington water