Miles City, MT Radon Mitigation and Testing

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

Based on 3 user-submitted tests, the average radon level is 3.30 pCi/L.

Q: What EPA Radon Zone is Miles City in?

Miles City is in Custer County, EPA Zone 1.

Q: How much does radon mitigation cost in Miles City?

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

Avg: 3.30 pCi/L

Custer County

EPA Zone 1

3 user tests

Miles City is located in Custer County, Montana. With 3 user-submitted readings averaging 3.30 pCi/L, levels are currently below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

3.30

pCi/L average

Below EPA Action Level

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

4.0 EPA

10+

Miles City, MT Radon Mitigation

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

Miles City, MT Radon Testing

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

Miles City, Montana Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
3 pCi/L	Miles City, MT	0-20 Years	No Basement/All Crawl Space	Sep 2025
2 pCi/L	Miles City, MT	21-50 Years	No Basement/All Slab	Apr 2023
5 pCi/L	Miles City, MT	51-99 Years	Full Basement	Jan 2022

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

Miles City Radon Facts

Key details about the radon risk profile for Miles City and the 59301 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Custer County, MT

Zip Code

59301

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

3.30 pCi/L

User Tests Submitted

Miles City and the 59301 zip code are located in Custer 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 Miles City, MT

What is the average radon level in Miles City, MT?

Based on 3 user-submitted tests, the average radon level in Miles City is 3.30 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.

What EPA Radon Zone is Miles City in?

Miles City and the 59301 zip code are in Custer 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 Miles City?

Radon mitigation in Miles City 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 Miles City?

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