Keller, WA Radon Levels
Check local Keller radon levels and find certified testing and mitigation professionals to keep your home safe
Keller, WA Radon Facts
EPA Radon Zone
Zone 1 — High Risk
> 4.0 pCi/L (Zone 1)
County
Ferry County, WA
Zip Code
99140
Positioned in Ferry County within Washington's northeastern mountains, Keller sits among granitic and metamorphic formations of the Okanogan Highlands. The remote community's housing consists primarily of older rural homes and cabins, many with basement or crawl space foundations that could influence radon accumulation patterns. Given the limited testing data available for the 99140 area, residents should conduct radon measurements to understand their individual exposure levels.
Keller, 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 Keller, WA
What EPA Radon Zone is Keller in?
Keller and the 99140 zip code are in Ferry 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 Keller?
Radon mitigation in Keller 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 Keller?
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.