Spills of oil or hazardous materials to water must be reported immediately to help reduce impacts to the environment. Failure to report a spill you're responsible for could result in penalties. Stop ...

The Water Quality Combined Funding Program funds projects that improve and protect water quality throughout Washington. The program combines grants and loans from state and federal funding sources.

We are required to fund the Wastewater Operator Certification (OpCert) Program with fees (WAC 173-230-240). We review and evaluate these fees every two years, then propose changes, if needed, based on ...

Ecology is proposing revisions to chapter 173-423 WAC, Washington’s Clean Vehicles Program rule. These revisions align with California’s changes to vehicle emissions standards that apply to new ...

For a limited time, we’re offering a program to help you obtain senior mitigation water to offset your use and reduce the ...