Spokane International Airport PFAS site

Ecology is requiring the Spokane International Airport (SIA), City of Spokane, and Spokane County to provide safe water to private wells with PFAS (per- and polyfluoroalkyl substances) above drinking water standards in the interim action area. Their plan is to provide:

• One pitcher and one countertop filter certified to remove PFAS and replacement cartridges. PFAS sampling results are not required to receive these point-of-use filters.
• Two 5-gallon, food-safe containers and access to the Garden Springs filling station, which can fill a range of container sizes.
• Replacement cartridges for under-sink filters the Washington Department of Health installed. Ongoing maintenance will be addressed in the Long-Term Interim Action Work Plan, which is due May 11, 2026.
• PFAS testing for all private wells in the interim action area. Testing is voluntary. We encourage you to respond when you are contacted to have your well tested.

The work plan includes a communication plan and sample public outreach materials, such as mailed surveys, a website to sign up for filtration devices and PFAS testing of your private well, and information about how to access the filling station.

Learn more

• Review the Short-term Interim Action Work Plan.
• Visit our SIA PFAS cleanup site page.

Next steps

We will consider and respond to all comments we receive during this public comment period. We will post our response to comments document on our SIA PFAS webpage, send the document to people who submitted comments, and email the West Plains PFAS updates email list.

Site background

We issued an enforcement order to SIA to investigate PFAS contamination in March 2024 after negotiating an agreed order for 150 days and not reaching an agreement. In August 2025, we named the City of Spokane and Spokane County as parties responsible for cleanup because the airport property is owned by the two local governments. We signed an agreed order with the City of Spokane and Spokane County in January 2026. The city, county, and SIA are responsible for investigation and cleanup costs and providing safe water.