Onalaska, WA Radon Levels
Check local Onalaska radon levels and find certified testing and mitigation professionals to keep your home safe
Onalaska, WA Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Lewis County, WA
Zip Code
98570
Positioned in Lewis County within zip code 98570, Onalaska sits in southwestern Washington's timber country where volcanic and sedimentary geology typically results in low radon levels. The EPA Zone 3 classification aligns with the minimal radon potential common throughout the Cascade foothills region. While specific testing data isn't available for this rural community, the zone designation suggests relatively low radon risk for most residential properties.
Onalaska, WA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Need Radon Mitigation or Testing in Onalaska?
- 100% Free, No-Obligation Quotes
- Matches You with State-Licensed Lewis County Pros
Radon FAQ for Onalaska, WA
What EPA Radon Zone is Onalaska in?
Onalaska and the 98570 zip code are in Lewis 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 Onalaska?
Radon mitigation in Onalaska 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 Onalaska?
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.