Puget Sound faces many threats from the everyday activities of the 4.5 million people who live on or around the nation’s second largest marine estuary. The Puget Sound region includes 2,800 square ...

Not all hardrock mining sites are contaminated. If you have a property with an abandoned mine, we may be able to help with sampling to determine if there are contamination concentrations above state ...

Since the early 1800s, miners in Washington have searched for metals such as copper, gold, lead, magnesium, silver, uranium, and zinc. Mining for metals is called hardrock mining, because of the types ...

We invite you to express your views on the State Waste Discharge Permit Application for Lincoln Rock Hydrogen Facility in East Wenatchee (Douglas County) from April 29 – June 5, 2025, 11:59 p.m.

The Chehalis Basin is a 2,700 square-mile river drainage system located in Southwest Washington along the Chehalis River and its tributaries. It is the second-largest river basin in Washington, ...

We are working with the Environmental Protection Agency (EPA), Washington State Department of Health (DOH), Spokane Regional Health District, Eastern Washington University, and the West Plains Water ...

Our team of scientists collects data on sediments and invertebrate communities found at the bottom of Puget Sound, to document condition and change over time. Why do we monitor the bottom of Puget ...

The City of Tacoma, in partnership with Western Washington collaborators, will characterize stormwater and stormwater sediment concentrations for several Contaminants of Emerging Concern (CEC). They ...