Lake Stevens, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Lake Stevens in?

Lake Stevens is in Snohomish County, EPA Zone 3.

Q: How much does radon mitigation cost in Lake Stevens?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Snohomish County

EPA Zone 3

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.

Lake Stevens, WA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Lake Stevens Radon Facts

Key details about the radon risk profile for Lake Stevens and the 98258 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Snohomish County, WA

Zip Code

98258

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Lake Stevens and the 98258 zip code are located in Snohomish County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

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 with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Vancouver	6.56 pCi/L	9
Kent	3.60 pCi/L	5
Seattle	5.25 pCi/L	4
Olympia	5.00 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
Washougal	8.00 pCi/L	1
Ridgefield	5.00 pCi/L	1
Moses Lake	No submissions	0