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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Paving the way to clean water through public art

The City of Tacoma recently completed water quality improvement projects in the Larchmont neighborhood and the Madison District with more than $6 million in Ecology funding for each project. 

Soos Creek's journey from decline to recovery

Ecology’s draft Soos Creek Fine Sediment TMDL aims to cut fine sediment in Soos Creek by improving stormwater management and restoring stream habitat to protect salmon, wildlife, and water quality.

SepticSmart Week: Funding your septic fix

Today we are focused on affordable options to repair or replace your septic system. Check out our blog on septic system basics if you are new to this topic.

Let's be septic smart together!

SepticSmart Week serves as a great reminder for homeowners to check their on-site septic systems. In Washington, about one-third of households rely on septic. That's close to one million homes!

Controlling aquatic plants and algae to support clean water

Our permit allows appropriate pesticide use to control noxious weeds that harm local ecosystems or disrupt agricultural production. We are asking for feedback on our updates to the permit.

Drayton Harbor’s bacteria problem

Help shape our plan to reduce bacteria in Drayton Harbor. Comment Aug. 21-Sept. 26, 2025, to protect shellfish, recreation, and community health.

Rattlesnake Creek is recovering

Eight years after a dam breach devastated Rattlesnake Creek, steelhead and wildlife are returning. This shows the creek’s natural resilience and the impact of ongoing restoration efforts.

New clean water protections proposed for sand and gravel facilities

We're sharing the notable updates we are proposing for the Sand and Gravel General permit as well as information about how you can share your feedback.

Groundbreaking program garners national recognition

On July 10, we received national recognition by national U.S. Water Alliance for our innovative Floodplains by Design program that's reducing flood risks and restoring salmon habitat in Washington.

How can we protect cool water in Western Washington’s forest streams?

Ecology has a role in protecting water quality at forestry sites, and our analysis of the draft Forest Practices Board rule is out for public comment.