Colville, WA Radon Mitigation and Testing

Q: What is the average radon level in Colville, WA?

Based on 1 user-submitted tests, the average radon level is 5.00 pCi/L.

Q: What EPA Radon Zone is Colville in?

Colville is in Stevens County, EPA Zone 1.

Q: How much does radon mitigation cost in Colville?

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

Avg: 5.00 pCi/L

Stevens County

EPA Zone 1

1 user test

Testing data from Stevens County shows radon levels of 5.0 pCi/L, exceeding EPA action guidelines in this northeastern Washington community. Located within the Spokane Metro area, the region's granite and metamorphic bedrock contribute to elevated radon potential in zip code 99114. Homeowners should consider professional mitigation, particularly in properties with basements or lower-level living areas.

5.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Colville, WA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Colville, WA Radon Mitigation

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

Colville, WA Radon Testing

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

Colville, Washington Radon Levels

User-submitted radon test readings from homes in the Colville area.

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Colville, WA	51-99 Years	Partial Basement	May 2025

Have a radon test result for Colville? Submit your reading to help other homeowners.

Colville Radon Facts

Key details about the radon risk profile for Colville and the 99114 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Stevens County, WA

Zip Code

99114

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

5.00 pCi/L

User Tests Submitted

Colville and the 99114 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 Colville, WA

What is the average radon level in Colville, WA?

Based on 1 user-submitted test, the average radon level in Colville is 5.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Colville in?

Colville and the 99114 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 Colville?

Radon mitigation in Colville 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 Colville?

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