Federal Way, WA Radon Levels
Check local Federal Way radon levels and find certified testing and mitigation professionals to keep your home safe
Federal Way, WA Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
King County, WA
Zip Code
98003
This suburban city in King County within the Seattle metropolitan area sits atop glacial till deposits that typically result in lower radon concentrations. Testing data remains limited for both the 98003 and 98023 zip code areas, making individual home testing valuable for residents. The community's predominantly post-1960s housing stock includes many homes with daylight basements and crawl spaces common to Pacific Northwest construction.
Federal Way, WA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Radon FAQ for Federal Way, WA
What EPA Radon Zone is Federal Way in?
Federal Way and the 98003 zip code are in King County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.
How much does radon mitigation cost in Federal Way?
Radon mitigation in Federal Way typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Federal Way?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.
Most Active Radon Markets in Washington
Cities in Washington with the most user-submitted radon test data, ranked by number of submissions.