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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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Restore Our Earth
Earth Day is just a few days away. Read about what we’ve got in store and learn about ways you can “Restore Our Earth”.
What You Can Do
No Discharge Zone continues to protect Puget Sound
We have good news for Puget Sound as EPA reaffirms the No Discharge Zone.
What We Do
Anderson Lake study suggests toxic blooms are a recent development
Core sampling study shows history of Anderson Lake’s toxic algae
Science
Comment on cruise ship agreement amendments
Seeking comments on proposed amendments to Washington's cruise ship environmental agreement.
What You Can Do
Draft permit outlines path to a healthier Puget Sound
We are continuing our work with Puget Sound communities to reduce the amount of nutrients flowing through wastewater treatment plants and into Puget Sound.
What We Do
$282 million proposed for clean water projects across the state
Ecology is proposing to award $282 million in grants and loans for 108 high-priority clean water projects across the state.
What We Do
Ecology's brushes with the famous
A brief list of some famous people Ecology has worked with over the past 50 years.
What We Do
Washington is leading the nation in stormwater management
For Ecology’s 50th anniversary, we are celebrating our municipal stormwater permit program – an example of hard work, partnership, and science coming together to make Washington better.
What We Do
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.
Science
If they build it, will the salmon come?
A restored Chelan River is prompting Ecology to evaluate what the river can support.
What We Do

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