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

Refer to the 2024 updated TAPE Process Overview for everything you need to know about how we evaluate your technology. We also accept applications to the Chemical Technology Assessment Protocol – ...

What is a wetland mitigation bank? A wetland mitigation bank is a site where wetlands are restored, created, enhanced, or in exceptional circumstances preserved for the express purpose of providing ...

As the state’s lead agency managing litter programs, we operate youth and adult litter pickup crews and provide funding for litter pickup and prevention to state and local governments. We also oversee ...

This page contains oil spill prevention, preparedness, and compliance resources for Class 2 facilities. We review and approve operations manuals, response plans, training and certification programs, ...

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

We plan to hold public meetings to provide information about the rulemaking and seek your input. We'll update this page with meeting specifics. To get updates about these meetings and this rulemaking, ...

The 2021 plastics law will reduce the use of covered single-use plastics. This law aims to reduce the production of new plastic and drive the development of new markets for Washington’s recyclable ...

Ecology hosted a public webinar series in February and March 2025. Experts discussed sea level rise projections, tools, adaptation best practices, examples of work throughout the state, and more.

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 ...

This Earth Day, we are hosting a coloring book design contest for kids across Washington. Students will learn about how to help prevent pollution and design coloring book pages with this in mind. This ...

State Route 112 faces numerous climate-related threats. Photo courtesy Washington State Department of Transportation. Washington’s coastlines might be considered the canary in the coal mine for the ...