Join us virtually on March 17, 2025, to learn more about our agency’s efforts in developing a strategy to achieve healthy ...

The Yakima River Basin Water Enhancement Project Workgroup, a stakeholder group co-chaired by us and the U.S. Bureau of Reclamation, provides policy and project development advice on implementing the ...

Ecology monitors multiple cleanup sites at Joint Base Lewis-McChord (JBLM). This page focuses on Per- and polyfluoroalkyl substances (PFAS) contamination in the groundwater. JBLM is in Pierce County, ...

Our aquatic plant specialist explains the differences between invasive and native milfoils, why native milfoils are important ...

Sample of vitrified material at the U.S. Department of Energy's Office of River Protection. For the past few decades, the most dangerous radioactive and chemical waste has been and continues to be ...

Water users affected by the Nooksack adjudication recently recieved post cards telling them their claim forms will be arriving later this month.

NextCycle Washington advances recycling and reuse projects for a circular economy. The third cohort of teams just started our ...

CLARC February 2025 updates are now online. We made updates to incorporate newly published IRIS toxicity values for arsenic and PFHxS and associated noncancer effects information. We also updated ...

We improve and protect water quality, manage and conserve water resources, and effectively manage coastal and inland shorelines to assure our state has sufficient supplies of clean water for ...

When food goes in the trash, so do resources, time, and money. Save on all three with small changes to your cooking and shopping habits. Get started today. Your food saving journey starts here. We’ve ...

We maintain the spatial datasets described here in order to better describe Washington's diverse natural and cultural environments. As a public service, we have made some of our data available for ...