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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28 results.

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.
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.
Anderson Lake study suggests toxic blooms are a recent development
Core sampling study shows history of Anderson Lake’s toxic algae
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.
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.
Is a harmful algae bloom coming to a lake near you?
Spring is when algae blooms can be seen in lakes, some of which are harmful to people, pets, and wildlife. Pay attention to warning and closure signs!
Latest health report on Washington beaches
See the good, the best, and the poopiest marine swimming beaches in our BEACH Program Annual Report.
Citizen science at Washington beaches

"Involving citizen science volunteers is vital to our monitoring program. Especially in smaller communities," said Julianne Ruffner, manager of Ecology's BEACH program.

Puget Sound Nutrient Watch: What we're learning from other states

We invited experts from Long Island Sound, Chesapeake Bay, and the San Francisco Bay to speak to the Puget Sound Nutrient Forum and share their work on reducing nutrients in estuaries

Understanding the environmental impacts of more water over the dam

We're considering allowing more water to spill over dams to help salmon migrate.

Showing 11 - 20 of 28 results.