Inchelium, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Inchelium in?

Inchelium is in Ferry County, EPA Zone 1.

Q: How much does radon mitigation cost in Inchelium?

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

Ferry County

EPA Zone 1

Inchelium, WA resides in Ferry 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. Testing is recommended for all homes in the 99138 zip code area.

Inchelium, WA Radon Mitigation

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

Inchelium, WA Radon Testing

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

Inchelium Radon Facts

Key details about the radon risk profile for Inchelium and the 99138 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Ferry County, WA

Zip Code

99138

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Inchelium and the 99138 zip code are located in Ferry 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 Inchelium, WA

What EPA Radon Zone is Inchelium in?

Inchelium and the 99138 zip code are in Ferry 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 Inchelium?

Radon mitigation in Inchelium 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 Inchelium?

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