We review and approve oil spill contingency plans for: Large oil-handling facilities that transfer oil over waters of the state. Hazardous liquids pipelines (oil pipelines).

We have four regional offices and four field offices across the state. Northwest Region: Island, King, Kitsap, San Juan, Skagit, Snohomish and Whatcom counties ...

There are sites on our Contaminated Sites List that we know have Per- and polyfluoroalkyl substances (PFAS) contamination. Although PFAS chemicals are not manufactured in Washington, they can still be ...

Sustainability isn't just about environmental responsibility — it's also about innovations that cut costs and reduce waste. The Washington Applied Sustainability Internship (WASI) program pairs ...

PEIS: Status: Next Actions: Green hydrogen energy facilities: Draft PEIS available for public comment from Jan. 7 until 11:59 p.m., Feb. 6, 2025: Review comments on draft PEIS. Final PEIS planned for ...

The water year begins Oct. 1 and ends Sept. 30. Three months before the calendar year changes, hydrologists and other water scientists mark the start of the new water year. Starting the water year in ...

Calling all businesses! The Washington Applied Sustainability Internship (WASI) program places summer interns at businesses to help implement pollution prevention (P2) and sustainability projects.

We're proposing to award $386 million in grants and loans for 134 high-priority clean water projects across the state. Our Water Quality Combined Funding Program supports communities by helping them ...

The Washington Department of Ecology issued $138,800 in penalties of $1,000 or more from July 1 – Sept. 30, 2023. A detailed list of the violations and resulting penalties is in the table below.

PFAS-containing foam – known as aqueous film-forming foam (AFFF) – is used to fight fires fueled by oil, gasoline, or other flammable liquids. It’s also a leading cause of PFAS contamination in ...

The federal Clean Water Act requires that our water quality standards protect existing designated uses by establishing the maximum level of pollutants we can allow in surface water. We require extra ...

The Water Transfer Working Group (WTWG) is a voluntary team of agency representatives, water managers, and water users who provide technical review of proposed water-right transfers in the Yakima ...