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

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 ...

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.

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 ...

National Pollutant Discharge Elimination System (NPDES) permits cover discharge to surface waterbodies like rivers, lakes, or the Puget Sound. State Waste Discharge Permits (SWD) cover discharge to ...

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 ...

In recent history, Washington has experienced three very strong El Niño events: 2016, 1998 and 1984. All three of those years ...

Washington's Environmental Justice Law, the HEAL Act, empowers us to conduct an Environmental Justice Assessment when we're planning a significant action. An Environmental Justice Assessment provides ...

The federal Clean Air Act requires large sources and some small sources of air pollution to get an air operating permit. An air operating permit is a master document that lists all of the air ...

Washington is the second-largest wine-producing state in the nation. If not properly managed, process wastewater from wineries can potentially harm groundwater resources and damage wastewater ...