Chewelah, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Chewelah in?

Chewelah is in Stevens County, EPA Zone 1.

Q: How much does radon mitigation cost in Chewelah?

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

Stevens County

EPA Zone 1

Located in Stevens County within the Spokane Metro area, Chewelah serves ZIP code 99109 in Washington's EPA Zone 1, where radon levels are generally expected to be elevated. Testing data for this mountain community remains limited, making professional radon testing essential for homeowners to understand their specific exposure risks. The area's geological characteristics and seasonal climate variations can influence radon accumulation patterns in local homes.

Chewelah, WA Radon Mitigation

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

Chewelah, WA Radon Testing

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

Chewelah Radon Facts

Key details about the radon risk profile for Chewelah and the 99109 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Stevens County, WA

Zip Code

99109

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Chewelah and the 99109 zip code are located in Stevens County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Chewelah, WA

What EPA Radon Zone is Chewelah in?

Chewelah and the 99109 zip code are in Stevens County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Chewelah?

Radon mitigation in Chewelah 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 Chewelah?

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