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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Yakima River receives ‘water quality’ check-up
Our scientists are conducting a water quality checkup of the Yakima River to see how things are doing. We have been tackling water quality challenges in the Yakima River Basin for 20 years.
Slime on river rocks is a forensics tool for environmental scientists
While most of us may not appreciate the slime that grows on river rocks, Dr. William Hobbs and his colleagues have found slime useful for investigating the sources of toxic chemicals in the water.
Update to general permit that helps remove noxious weeds

Removing Zostera japonica, a noxious weed, from Willapa Bay Commercial Clam Beds.

Looking upriver: What's next for the Walla Walla watershed?

In October, stakeholders from Washington and Oregon will refocus and build on the Walla Walla Watershed Management Partnership to create a long-term water strategy.

Ecology considers General Permit to control nutrients in Puget Sound

Excess levels of nutrients from human sources are harming Puget Sound. 

These wastewater treatment plants earn an A+ in clean water

Keeping a wastewater treatment plant in top-performing condition can be a tough job,  so every year we recognize these top-notch facilities and their operators.

Use caution if your local lake has a colorful coating
Reports of toxic blue-green algae blooms are beginning to surface east of the Cascades.
From onsite septic repair to stormwater infrastructure, $183 million is going to more than 100 clean water projects

We are offering more than $183 million in financial assistance for 106 high-priority clean water projects across the state.

By managing stormwater, cities and counties are helping to protect Washington’s waters
Reducing stormwater pollution helps prevent toxins from entering the water and harming orca and salmon.
Calling all lovers of the Puget Sound!

We are hosting a Puget Sound Nutrient Dialog - an all day meeting to discuss and learn.