Monroe, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Monroe in?

Monroe is in Snohomish County, EPA Zone 3.

Q: How much does radon mitigation cost in Monroe?

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

Set in Snohomish County as part of the Seattle Metro area (98272), Monroe sits on glacial deposits and marine sediments typical of the Puget Sound region. Although specific radon testing data is currently limited, the area's diverse geological foundation and housing stock ranging from older farmhouses to modern subdivisions make individual home testing advisable.

Monroe, WA Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Monroe, WA Radon Testing

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

Monroe Radon Facts

Key details about the radon risk profile for Monroe and the 98272 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Snohomish County, WA

Zip Code

98272

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Monroe and the 98272 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 Monroe, WA

What EPA Radon Zone is Monroe in?

Monroe and the 98272 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 Monroe?

Radon mitigation in Monroe 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 Monroe?

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