Billings, MT Radon Levels

Q: What is the average radon level in Billings, MT?

Based on 3 user-submitted tests, the average radon level is 5.30 pCi/L.

Q: What EPA Radon Zone is Billings in?

Billings is in Yellowstone County, EPA Zone 2.

Q: How much does radon mitigation cost in Billings?

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

Check local Billings radon levels and find certified testing and mitigation professionals to keep your home safe

Billings, MT Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Yellowstone County, MT

Zip Code 59101

Avg. User Level 5.30 pCi/L

User Tests 3

Montana's largest city in Yellowstone County has recorded an average radon level of 5.33 pCi/L across multiple zip codes (59101, 59102, 59105). This reading exceeds the EPA action level, reflecting Billings' position atop Tertiary sediments and Fort Union Formation rocks along the Yellowstone River valley. Residents throughout the Billings Metro should test their homes and consider mitigation, particularly in properties with basements or lower-level living spaces.

5.30

pCi/L average

Above EPA Action Level

Based on 3 user-submitted radon tests for homes in Billings, MT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Billings, MT Radon Mitigation

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Billings, MT Radon Levels

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

Radon Level	City	Home Age	Foundation
4 pCi/L	Billings, MT	51-99 Years	Full Basement
8 pCi/L	billings, MT	21-50 Years	Full Basement

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

Radon FAQ for Billings, MT

What is the average radon level in Billings, MT?

Based on 3 user-submitted tests, the average radon level in Billings is 5.30 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 Billings in?

Billings and the 59101 zip code are in Yellowstone 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 Billings?

Radon mitigation in Billings 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 Billings?

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 Montana

Cities in Montana with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Butte	10.20 pCi/L	10
Missoula	6.25 pCi/L	8
Florence	11.67 pCi/L	3
Bozeman	10.33 pCi/L	3
Helena	8.67 pCi/L	3
Stevensville	7.67 pCi/L	3
Sidney	7.33 pCi/L	3
Billings	5.33 pCi/L	3
Miles City	3.33 pCi/L	3
Kalispell	7.50 pCi/L	2

Billings, MT Radon Levels

Check local Billings radon levels and find certified testing and mitigation professionals to keep your home safe

Billings, MT Radon Facts

Billings, MT Radon Mitigation

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Billings, MT Radon Levels

Radon FAQ for Billings, MT

Most Active Radon Markets in Montana

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