Usk, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Usk in?

Usk is in Pend Oreille County, EPA Zone 1.

Q: How much does radon mitigation cost in Usk?

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

Located in remote Pend Oreille County in northeastern Washington, Usk sits within the Idaho Batholith region where granite bedrock can contribute to elevated radon levels. The community's EPA Zone 1 designation reflects high radon potential, though testing data for the 99180 zip code area remains limited. Given the region's geological characteristics and the prevalence of homes with partial basements, residents are advised to conduct comprehensive radon testing.

Usk, WA Radon Mitigation

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

Usk, WA Radon Testing

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

Usk Radon Facts

Key details about the radon risk profile for Usk and the 99180 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Pend Oreille County, WA

Zip Code

99180

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Usk and the 99180 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 Usk, WA

What EPA Radon Zone is Usk in?

Usk and the 99180 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 Usk?

Radon mitigation in Usk 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 Usk?

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