Colbert, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Colbert in?

Colbert is in Spokane County, EPA Zone 1.

Q: How much does radon mitigation cost in Colbert?

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

Spokane County

EPA Zone 1

Situated in eastern Washington's Spokane County within the Spokane Metro area, Colbert sits on Columbia River basalt formations that place it in EPA Zone 1 for elevated radon potential. The community's residential development in 35005 includes ranch-style homes and newer construction, many with basement foundations where radon typically accumulates. Limited local testing data makes professional radon assessment essential for homeowners to determine whether mitigation systems may be needed.

Colbert, WA Radon Mitigation

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

Colbert, WA Radon Testing

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

Colbert Radon Facts

Key details about the radon risk profile for Colbert and the 99005 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Spokane County, WA

Zip Code

99005

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Colbert and the 99005 zip code are located in Spokane 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 Colbert, WA

What EPA Radon Zone is Colbert in?

Colbert and the 99005 zip code are in Spokane 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 Colbert?

Radon mitigation in Colbert 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 Colbert?

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