Ione, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Ione in?

Ione is in Pend Oreille County, EPA Zone 1.

Q: How much does radon mitigation cost in Ione?

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

Pend Oreille County

EPA Zone 1

Northeast Washington's Ione, situated in Pend Oreille County, sits on glacial deposits and metamorphic bedrock formations common to the Northern Rocky Mountain region. Testing data for zip code 99139 is currently limited in this sparsely populated forested area. Given Washington's variable radon potential and the geological characteristics of the region, homeowners should conduct testing to establish local baseline levels.

Ione, WA Radon Mitigation

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

Ione, WA Radon Testing

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

Ione Radon Facts

Key details about the radon risk profile for Ione and the 99139 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Pend Oreille County, WA

Zip Code

99139

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Ione and the 99139 zip code are located in Pend Oreille 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 Ione, WA

What EPA Radon Zone is Ione in?

Ione and the 99139 zip code are in Pend Oreille 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 Ione?

Radon mitigation in Ione 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 Ione?

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