Our long-term river and stream monitoring team collects long-term data to track trends in stream health and contribute to watershed studies and water quality improvement plans. Our water quality ...

Our mission is to keep Washington waters clean. Use this site to find out if a lake, stream, or marine beach near you is healthy or polluted. Learn about water cleanup plans and how we’re addressing ...

If your business emits air pollution, you will most likely be regulated by us or your local clean air agency and have to report your emissions. We track air pollutants, toxics, and greenhouse gas ...

We are committed to providing equal opportunities, resources, and access to all Washingtonians, regardless of abilities or circumstances.

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 ...

As a subset of commercial enterprises, mobile businesses have unique challenges related to stormwater and pollution prevention that will be better understood by a focused study. In this project, King ...

SEPA guidance on conducting programmatic or "nonproject" proposals. Unless they are specifically exempted, proposals such as plans, ordinances, programs, and administrative rule actions must be ...

The following templates are based on applicable SEPA rule sections and other guidance materials. Lead agencies are encouraged to modify these templates for their own use and add information for ...

Find a grant or loan and details about the application process, eligibility, types of projects, timelines, requirements, and other information. Click on one of the links below.

We prevent and clean up toxic leaks and spills across the state. We respond to spills, inspect chemical storage and transport facilities, and clean up complex contaminated sites that threaten the ...

Our Nuclear Waste Program oversees cleanup at the Hanford Nuclear Reservation near Richland, Washington. The site produced plutonium for military defense between 1943 and 1989, and later served as a ...

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 ...