Morton, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Morton in?

Morton is in Lewis County, EPA Zone 3.

Q: How much does radon mitigation cost in Morton?

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

Lewis County

EPA Zone 3

Nestled in the Cascade foothills of Lewis County, Morton sits on volcanic soils and glacial deposits that can produce variable radon levels throughout western Washington. With testing data limited for the 98356 zip code area, residents should prioritize individual home testing regardless of construction type. The community's mix of older timber-frame homes and newer construction reflects the region's logging heritage and ongoing residential development.

Morton, WA Radon Mitigation

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

Morton, WA Radon Testing

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

Morton Radon Facts

Key details about the radon risk profile for Morton and the 98356 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Lewis County, WA

Zip Code

98356

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Morton and the 98356 zip code are located in Lewis 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 Morton, WA

What EPA Radon Zone is Morton in?

Morton and the 98356 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 Morton?

Radon mitigation in Morton 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 Morton?

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