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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There's a new sign for a healthier Puget Sound
Free signs are available to help protect Puget Sound.
Nutrient pollution modeling shows different futures for Puget Sound
This week, we shared our latest Salish Sea modeling results, which are moving us another step forward on regional efforts to reduce nutrients.
Wastewater treatment plant operators protect water during pandemic
126 wastewater treatment plants, nearly 40% of Washington’s treatment systems, earned the top-performing status this year.
New paper about Contaminants of Emerging Concern in wastewater

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

Ecology extends public comment period for draft net pen guidance
We have extended the deadline for the public to comment on draft state guidance for commercial marine net pens to Aug. 5, 2021.
To prevent dead zones in Puget Sound, communities must tackle nutrient pollution
The Puget Sound Nutrient General Permit is a major milestone in restoring the health of Puget Sound.
Safer streets and cleaner water in Walla Walla
The City of Walla Walla's award winning transportation project is good for the community and for salmon.
Pump Out, Don’t Dump Out - Help protect Puget Sound!
The Pump Out, Don't Dump Out campaign reminds boaters that Puget Sound is a No Discharge Zone and encourages them to pump out their boat sewage.
Clean & safe water for communities
This summer, scientists plan to sample 170 wells as part of the larger effort to address elevated nitrate in the Lower Yakima Valley.
Cleaning up: An update to the Landsburg Mine site cleanup plan
We're proposing changes to the cleanup plan for the Landsburg Mine site to enable response, if needed, if monitoring detects 1,4 dioxane above action levels.