Addy, WA Radon Levels
Check local Addy radon levels and find certified testing and mitigation professionals to keep your home safe
Addy, WA Radon Facts
EPA Radon Zone
Zone 1 — High Risk
> 4.0 pCi/L (Zone 1)
County
Stevens County, WA
Zip Code
99101
Found in Stevens County within the Spokane Metro area, Addy sits in northeastern Washington where granitic soils and underlying crystalline bedrock can contribute to radon gas production. Testing data for zip code 99101 is limited, making individual home radon testing important for residents. Washington's EPA Zone 1 classification for this region indicates elevated radon potential across the inland Northwest's mountainous terrain.
Addy, WA Radon Mitigation
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Radon FAQ for Addy, WA
What EPA Radon Zone is Addy in?
Addy and the 99101 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 Addy?
Radon mitigation in Addy 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 Addy?
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.