Clayton, WA Radon Levels
Check local Clayton radon levels and find certified testing and mitigation professionals to keep your home safe
Clayton, WA Radon Facts
EPA Radon Zone
Zone 1 — High Risk
> 4.0 pCi/L (Zone 1)
County
Stevens County, WA
Zip Code
99110
Located in Stevens County within the Spokane Metro region, Clayton sits on Columbia Plateau basalt geology where volcanic bedrock generally produces lower radon emissions. Testing data is limited for the 99110 zip code, encouraging residents to conduct individual assessments. The area's mix of rural homes and newer construction typically features crawl space or slab foundations that may have different radon entry characteristics than full basement homes.
Clayton, 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 Clayton, WA
What EPA Radon Zone is Clayton in?
Clayton and the 99110 zip code are in Stevens County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
How much does radon mitigation cost in Clayton?
Radon mitigation in Clayton 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 Clayton?
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.