Tumtum, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Tumtum in?

Tumtum is in Stevens County, EPA Zone 1.

Q: How much does radon mitigation cost in Tumtum?

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

Stevens County

EPA Zone 1

Situated in Stevens County within the Spokane Metro area, Tumtum sits on glacial deposits and volcanic soils that typically produce lower radon levels in eastern Washington. Testing data for zip code 99034 is currently unavailable, leaving radon exposure levels uncertain for this rural community. Despite the region's generally favorable geological conditions, homeowners should test their properties to ensure safe indoor air quality.

Tumtum, WA Radon Mitigation

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

Tumtum, WA Radon Testing

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

Tumtum Radon Facts

Key details about the radon risk profile for Tumtum and the 99034 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Stevens County, WA

Zip Code

99034

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Tumtum and the 99034 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 Tumtum, WA

What EPA Radon Zone is Tumtum in?

Tumtum and the 99034 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 Tumtum?

Radon mitigation in Tumtum 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 Tumtum?

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