Rosalia, WA Radon Levels
Check local Rosalia radon levels and find certified testing and mitigation professionals to keep your home safe
Rosalia, WA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
Whitman County, WA
Zip Code
99170
Positioned in the Palouse region of Whitman County, Rosalia sits on loess deposits over basalt bedrock that can create moderate radon conditions throughout eastern Washington. The community features older farmhouses and rural residences, many with full or partial basements common in cold-climate construction. Testing data for zip code 99170 remains limited, making individual home testing advisable given the area's geological characteristics.
Rosalia, WA Radon Mitigation
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Radon FAQ for Rosalia, WA
What EPA Radon Zone is Rosalia in?
Rosalia and the 99170 zip code are in Whitman County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
How much does radon mitigation cost in Rosalia?
Radon mitigation in Rosalia 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 Rosalia?
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.