Oroville, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Oroville in?

Oroville is in Okanogan County, EPA Zone 1.

Q: How much does radon mitigation cost in Oroville?

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

Okanogan County

EPA Zone 1

Positioned in Okanogan County near the Canadian border, Oroville occupies EPA Zone 1 with high radon potential from Washington's complex geological formations. Limited testing data for zip code 98844 underscores the need for comprehensive home testing in this rural community. The region's granite bedrock and glacial deposits can contribute to elevated radon levels in residential properties.

Oroville, WA Radon Mitigation

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

Oroville, WA Radon Testing

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

Oroville Radon Facts

Key details about the radon risk profile for Oroville and the 98844 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Okanogan County, WA

Zip Code

98844

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Oroville and the 98844 zip code are located in Okanogan 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 Oroville, WA

What EPA Radon Zone is Oroville in?

Oroville and the 98844 zip code are in Okanogan 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 Oroville?

Radon mitigation in Oroville 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 Oroville?

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