There is so much to discover about how Ecology’s work might show up in your life. Stay in the loop so you know about air and ...

New PFAS rules took effect in 2025, making consumer products safer in Washington. See how Ecology is reducing pollution at ...

Learn how to record and report water use Learn about meter types and how to read them Contact a Metering Coordinator ...

Water quality issues. Fish and wildlife protection or enhancement in or adjacent to waters of the state, such as streams, lakes, wetlands, or the ocean. To be considered, projects must provide primary ...

Learn more about climate action in Washington. Owners and operators of municipal solid waste landfills Projects must be necessary and directly related to meeting or exceeding the compliance ...

We are responsible for protecting, preserving, and enhancing Washington’s environment. Permits and certifications ensure that individuals and businesses understand and comply with all applicable ...

Planning to visit one of our offices? If you would like to meet with a staff member in person, please call ahead to confirm that they will be available. Our office hours are Monday to Friday, 8 a.m. – ...

The rains and floods that swept through our communities in December was followed by cooler weather and heavy snow. That ...

Determining processes and strategies for emission reductions to achieve air quality targets in overburdened communities initially identified by Ecology. Other rule language necessary for ...

Coho salmon returning to rivers and streams often die before they can spawn. Photo by Roger Tabor, US Fish and Wildlife For over 20 years, scientists faced a toxic mystery: coho salmon returning to ...

Tugboats. Street sweepers. Freight switchers. Ambulances. Box trucks. All of these vehicles typically run on diesel engines that produce harmful exhaust. But there is cleaner technology available, and ...

We adopted changes to chapter 173-201A Water Quality Standards for Surface Waters of the State of Washington. In response to nominations we received in 2021, and after considering public comments and ...