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Lake Stevens, WA Radon Levels

Check local Lake Stevens radon levels and find certified testing and mitigation professionals to keep your home safe


Lake Stevens, WA Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
County Snohomish County, WA
Zip Code 98258

This growing Seattle metro community in Snohomish County sits on glacial deposits and marine sediments typical of the Puget Sound region. Current radon testing data for the 98258 area is limited, though Washington's varied geology means testing remains important for homeowners. The community's rapid residential growth includes many homes with daylight basements that could be susceptible to radon accumulation.

Lake Stevens, 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 Lake Stevens?

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Radon FAQ for Lake Stevens, WA

What EPA Radon Zone is Lake Stevens in?
Lake Stevens and the 98258 zip code are in Snohomish 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 Lake Stevens?
Radon mitigation in Lake Stevens 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 Lake Stevens?
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.

CityAvg User Radon LevelSubmissions
Vancouver 6.56 pCi/L 9
Kent 3.50 pCi/L 6
Olympia 7.00 pCi/L 5
Seattle 5.25 pCi/L 4
Bellevue 3.75 pCi/L 4
Spokane 11.67 pCi/L 3
Camas 8.00 pCi/L 3
Centralia 7.00 pCi/L 3
Bellingham 4.50 pCi/L 2
Kirkland 4.50 pCi/L 2