Environmental projects

We conduct State Environmental Policy Act (SEPA) reviews for some proposed rule amendments, programs, toxic cleanup actions, various minor projects, and a few major projects such as energy transportation and storage proposals. We also review requests for, and issue a wide variety of permits for environmental projects.

Improving Spokane Watershed

Working with our partners to keep the Spokane River basin clean.

Lower Yakima Valley Groundwater Management Area

We're partnering in a local effort to reduce nitrate concentrations in Lower Yakima Valley wells.

Pasco Basin groundwater

Learn more about Pasco Basin groundwater management project.

Pend Oreille mine

Pend Oreille Mine regulatory requirements for closure.


SEPA is a tool used by WA governments to determine potential environmental impacts from projects.