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 ...

Ecology is at work statewide to protect your air, water and quality of life. Learn more about our regional work.

Solar panels convert solar energy into electricity through solar cells (also known as photovoltaic cells). Solar panels sometimes contain toxic metals, which means they may designate as dangerous ...

Phases out the use of copper in vehicle brakes and requires manufacturers to certify that brakes comply with the law. Regulates lead, cadmium, phthalates, and other chemicals in children's products.

Washington is home to some of the nation's most productive farmlands. The way landowners and operators manage their lands also has important impacts on water quality. We work with landowners, ...

Casey Sixkiller was appointed by Governor Bob Ferguson as the 14th Director of the Washington State Department of Ecology. With more than two decades of experience in federal, Tribal, regional, and ...

Every five years, the Washington Coastal Zone Management Program conducts a self-assessment of our program to determine gaps and improvement opportunities within nine enhancement areas, and to assess ...

SEPA guidance for determining lead agency and evaluating the proposal. Under the State Environmental Policy Act (SEPA), most new proposals are reviewed by a designated “lead agency.” While this is ...

We are implementing projects to meet current and future water needs in the Columbia River Basin. By ensuring the region is prepared to respond to droughts, our work supports growing communities, the ...

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 ...

This facility makes hydrogen peroxide. It currently sends (discharges) wastewater to the Three Rivers Regional Wastewater treatment plant and Nippon Dynawave pulp and paper mill for treatment. Both ...

Discharge standards can vary, but most of Washington's wastewater treatment plants (WWTPs) must meet technology-based effluent limits. See full standards and alternative discharge limit details in ...