Cle Elum, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Cle Elum in?

Cle Elum is in Kittitas County, EPA Zone 2.

Q: How much does radon mitigation cost in Cle Elum?

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

Kittitas County

EPA Zone 2

Positioned in Kittitas County along the eastern Cascade foothills, Cle Elum sits on volcanic and sedimentary geology where radon levels can vary significantly with local bedrock composition. Testing data is limited for the 98922 zip code, encouraging homeowners to establish baseline readings. This former mining town's housing includes both historic structures and newer mountain homes, many with full basements that could concentrate radon if present.

Cle Elum, WA Radon Mitigation

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

Cle Elum, WA Radon Testing

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

Cle Elum Radon Facts

Key details about the radon risk profile for Cle Elum and the 98922 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Kittitas County, WA

Zip Code

98922

Predicted Screening Level

2–4 pCi/L (Zone 2)

Cle Elum and the 98922 zip code are located in Kittitas County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Cle Elum, WA

What EPA Radon Zone is Cle Elum in?

Cle Elum and the 98922 zip code are in Kittitas County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Cle Elum?

Radon mitigation in Cle Elum 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 Cle Elum?

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