Libby, MT Radon Mitigation and Testing

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

Based on 3 user-submitted tests, the average radon level is 16.00 pCi/L.

Q: What EPA Radon Zone is Libby in?

Libby is in Lincoln County, EPA Zone 1.

Q: How much does radon mitigation cost in Libby?

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

Avg: 16.00 pCi/L

Lincoln County

EPA Zone 1

3 user tests

Libby is located in Lincoln County, Montana. With 3 user-submitted readings averaging 16.00 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 59923 zip code.

16.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Libby, MT Radon Mitigation

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

Libby, MT Radon Testing

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

Libby, Montana Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
20 pCi/L	Libby, MT	51-99 Years	No Basement/All Crawl Space	Feb 2026
8 pCi/L	Libby, MT	100+ Years	Partial Basement	Dec 2024

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

Libby Radon Facts

Key details about the radon risk profile for Libby and the 59923 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Lincoln County, MT

Zip Code

59923

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

16.00 pCi/L

User Tests Submitted

Libby and the 59923 zip code are located in Lincoln 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 Libby, MT

What is the average radon level in Libby, MT?

Based on 3 user-submitted tests, the average radon level in Libby is 16.00 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 Libby in?

Libby and the 59923 zip code are in Lincoln 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 Libby?

Radon mitigation in Libby 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 Libby?

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 with the most user-submitted radon test data in the state.

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
Great Falls	4.50 pCi/L	2
Whitefish	4.00 pCi/L	2
Ennis	9.00 pCi/L	1
Livingston	No submissions	0