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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Ecology proposes to fund 102 clean water projects across the state

We're proposing to award $175.5 million for 102 high-priority clean water projects across the state.

Balancing wildlife conservation and wastewater infrastructure in Pasco

The expansion of the Pasco Process Water Reuse Facility has been an example of how working together can lead to successful wildlife conservation and clean water infrastructure projects.   

Ecology issues final water quality permit for Everett’s Water Pollution Control Facility

We've issued the final water quality permit for Everett's Water Pollution Control Facility, which will go in effect on Jan. 1, 2025.

Updates to a permit that helps remove noxious weeds

We're proposing the changes to the 2025 draft Zostera japonica permit that is used to control this noxious weed on clam beds in Willapa Bay. 

Tracking residential wastewater and stormwater rates

Our interactive data dashboard helps organize information about residential wastewater and stormwater costs to prioritize future clean water projects and funding needs.

Diving into the data on Washington’s water quality

The Water Quality Assessment has millions of data points on rivers, streams, lakes, and marine waters across Washington state. 

Pilot project takes root with landowners along Hangman Creek

Ecology's innovative pilot program with Spokane Conservation District is transforming hundreds of acres along Hangman Creek. 

Restoration in action: more trees on the way for Flaming Geyser State Park

Highlighting riparian restoration work at Flaming Geyser State Park.

Keeping your septic system on point

SepticSmart Week is an annual event that serves as a great reminder to do a check up on your on-site sewage system if you have one. 

Investigating the French Creek orange water mystery

For the past few summers, neighbors along French Creek in Snohomish County have been noticing an unusual orange hue in the stream. Here’s what we found in our investigation.