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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PFAS Sampling in Lake Washington
Scientists from our Toxic Studies Unit recently completed the first round of sampling as part of a new PFAS study in Lake Washington and its tributaries.
If they build it, will the salmon come?
A restored Chelan River is prompting Ecology to evaluate what the river can support.
Improving our permit that helps lake managers control aquatic plants and algae
We are looking for feedback on draft updates to the general permit for aquatic plant and algae management.
Little Spokane River cleanup plan ready for public review
Ecology's draft plan for better water quality in the Little Spokane River is available for comment
Our 5 most popular science reports
Our scientists publish about 100 scientific documents every year. The five most popular range from studies using the Salish Sea Model to instructions for gaining lab accreditation.
EPA plan for Washington and Oregon rivers leaves salmon in hot water
We're submitting our comments on EPA temperature TMDL for the Columbia and Snake rivers.
Additional $10 million for stormwater projects
We determined that there is an additional $10 million available to fund 22 more stormwater projects across the state.
$332,000 Cooke Aquaculture penalty supports habitat restoration in Skagit County and statewide
Salmon will have better habitat in Skagit county with help from a $332,000 penalty settlement with Cooke Aquaculture after the collapse of its floating pen near Cypress Island in 2017.
Ready for summer!
Halfway through this year of pandemic and upheaval, summer brings much to do — and appreciate.
$21.2 million awarded for clean water projects in the southwest region
We're offering financial assistance for 26 high-priority projects.