We also provide educational resources to property owners who want to drill a new well, maintain a well, or close down (decommission) an unused well. Well drillers and property owners have the ...

How mercury enters fish as methylmercury in freshwater systems. Mercury is toxic in any form and can persist in the environment. In Washington, most people are exposed to mercury through eating ...

The Washington state well report (log) viewer, our most popular online resource, allows you to search for and view detailed records of the construction and subsurface characteristics of individual ...

We've always focused on protecting and improving Washington's environment. Our work removes toxics from the environment through prevention and cleanup, improves conditions for the food web, and ...

Statewide General Permit for Biosolids Management (expired) – This statewide permit applies to all facilities subject to the Washington's biosolids program. When facilities receive final approval of ...

We collect data from a variety of facilities and sources to better understand solid waste and recycling systems in Washington. We also conduct periodic waste disposal and recycling studies. This ...

Ecology is considering amendments to the Clean Vehicles Program rule. Visit our rulemaking page for more information, including upcoming virtual information sessions and recordings. Washington is one ...

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 ...

If you are a used oil processor or re-refiner, there are rules and requirements you need to follow. Learn about permits, site identification numbers, and other resources to help you properly handle ...

As the state’s lead agency managing litter programs, we operate youth and adult litter pickup crews and provide funding for litter pickup and prevention to state and local governments. We also oversee ...

The Washington Legislature enacted the State Environmental Policy Act in 1971. Commonly called SEPA, the law helps state and local agencies identify environmental impacts likely result from projects ...

Our team of engineers, chemists, toxicologists, and environmental specialists provide non-enforcement pollution prevention (P2) technical assistance to businesses like yours. We provide services ...