About 700 residential properties were potentially affected by smelter contamination in the upland area. We have now completed sampling on all the properties that agreed to be sampled (more than 550).

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 ...

Any individual, group, or entity that believes they have been subjected to discrimination based on disability with regard to any Ecology activity, facility, program, or service are encouraged to ...

Our team receives many questions regarding the hydrofluorocarbons (HFCs) rule, restrictions, and requirements. To best support the transition away from HFCs, we've consolidated educational resources ...

Clean and cool water is vital to salmon recovery across Washington. Industry and land use practices, including agriculture, logging and development, can impact streamside plants and contribute to ...

2024 intern Bella Aguirre implements a full flow meter project at host business Valence Surface Technologies. Sustainability isn't just about environmental responsibility — it's also about innovations ...

Many businesses in Washington generate some type of dangerous waste — waste that is harmful to human health and the environment. Businesses must follow the Dangerous Waste Regulations to ensure they ...

Public comments are accepted over a 30-, 45-, or 60-day period. During that time, you can share your input with us about specific changes in the permits we regulate. We review all comments and then ...

Our agency is dedicated to preserving and protecting the environment in Washington. To learn how we preserve and protect Washington's land, air, and water for today and for future generations, read ...

Many businesses in Washington generate some type of dangerous waste — waste that is harmful to human health and the environment. Businesses must follow the Dangerous Waste Regulations to ensure they ...

Air quality in Washington has greatly improved since 1991 when the Legislature expanded statewide air quality protection. In the mid-1990s, 13 areas of Washington did not meet national health-based ...

Our mission is to keep Washington waters clean. Use this site to find out if a lake, stream, or marine beach near you is healthy or polluted. Learn about water cleanup plans and how we’re addressing ...