The Dangerous Waste Report summarizes a business’s dangerous waste activities in Washington. All sites with an active EPA/State ID Number must submit a Dangerous Waste Report. Some businesses are ...

This enforcement action follows the conclusion of Ecology’s investigation of the 2023 Conway spill. For questions about the ongoing response for a leak on the Olympic Pipeline that began Nov. 11, 2025 ...

Clean air is vital for everyone. We manage smoke, vehicle pollution, industrial emissions, and other pollutants so communities have healthy air to breathe. We do this through permits, regulations, and ...

Washington is working to reduce greenhouse gas emissions 95% by 2050. This will help protect Washington's environment and economy from the effects of climate change.

This is the list of rules we are authorized to implement. They are sorted by topic. Each rule links to official rule language on the Washington State Legislature's Code Reviser's web site. The Office ...

The Lower Peshastin Creek Restoration Project cleaned up contamination, reconnected the creek to its historical channel, and ...

A revised draft environmental impact statement looks at the potential impacts to fish, habitat, water quality and nearby communities from a proposed project to reduce flood damage in the Chehalis ...

Ecology is considering amendments to Chapter 173-423 WAC, Washington’s Clean Vehicles Program rule. Washington law (RCW 70A.30.010) requires Ecology to adopt certain California regulations to maintain ...

In 2024, litter-pickup programs we funded collected more than 5.2 million pounds (2,632 tons) of litter and cleaned more than 18,000 miles of road, statewide. See how much litter crews picked up in ...

We are starting two rulemakings to update Washington’s water quality standards to help address freshwater nutrient pollution and the harmful, toxic algal blooms that can result from it.

On June 30, 2025, we released final programmatic environmental impact statements for three types of clean energy facilities in Washington -- utility-scale onshore wind, solar and green hydrogen ...

Ecology is considering adding new freshwater recreational criteria to Chapter 173-201A WAC, Water quality standards in surface waters of the State of Washington. The criteria are for toxins produced ...