This page is for information and documents specific to the 2025–27 budget. The process for developing and finalizing a budget is iterative. Budget documents are written, summarized, and compared ...

The U.S. Fish and Wildlife Service, in collaboration with Washington State University, is testing how long a bioretention soil mix can be used to reduce pollution and toxicity from urban stormwater.

We are accountable to the Legislature, the Governor, and the people of Washington. We make every effort to ensure our work is transparent.

We sometimes conduct special studies to better understand air quality issues in a specific location and identify ways to improve air quality. When we develop these studies, we often partner with ...

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 ...

We also provide educational resources to property owners who want to drill a new well, maintain a well, or close down (decommission) an unused well. Well drillers and property owners have the ...

Use this form to update your contact information for the Wastewater Operator Certification program.

There are sites on our Contaminated Sites List that we know have Per- and polyfluoroalkyl substances (PFAS) contamination. Although PFAS chemicals are not manufactured in Washington, they can still be ...

Looking for a service provider? Here is a excel spreadsheet that lists certified UST service providers.This list is updated quarterly. Disclaimer: We do not assume any liability for the accuracy or ...

The Voluntary Cleanup Program (VCP) helps property owners who are independently cleaning up their site. We provide technical assistance for a fee. Successful cleanups completed through the VCP receive ...

In 2013, under Chapter 90.38 RCW, the Legislature authorized funding for the initial development phase of the Yakima Basin Integrated Plan (YBIP), a consensus-based effort to assure sustainable water ...

From 1945 until 1987, the U.S. had an insatiable need for plutonium to fuel the country's nuclear arsenal. In the quest to maintain nuclear superiority during the Cold War, the federal government ...