Butte, MT Radon Mitigation and Testing

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

Based on 10 user-submitted tests, the average radon level is 10.20 pCi/L.

Q: What EPA Radon Zone is Butte in?

Butte is in Silver Bow County, EPA Zone 1.

Q: How much does radon mitigation cost in Butte?

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

Avg: 10.20 pCi/L

Silver Bow County

EPA Zone 1

10 user tests

Butte is located in Silver Bow County, Montana. With 10 user-submitted readings averaging 10.20 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 59701 zip code.

10.20

pCi/L average

Above EPA Action Level

Based on 10 user-submitted radon tests for homes in Butte, MT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Butte, MT Radon Mitigation

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

Butte, MT Radon Testing

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

Butte, Montana Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Butte, MT	100+ Years	Partial Basement	Oct 2025
19 pCi/L	Butte, MT	21-50 Years	Full Basement	Oct 2025
10 pCi/L	Butte, MT	51-99 Years	Full Basement	May 2020
4 pCi/L	Butte, MT	51-99 Years	—	Nov 2019
20 pCi/L	Butte, MT	100+ Years	Partial Basement	Oct 2019

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

Butte Radon Facts

Key details about the radon risk profile for Butte and the 59701 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Silver Bow County, MT

Zip Code

59701

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

10.20 pCi/L

User Tests Submitted

Butte and the 59701 zip code are located in Silver Bow 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 Butte, MT

What is the average radon level in Butte, MT?

Based on 10 user-submitted tests, the average radon level in Butte is 10.20 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 Butte in?

Butte and the 59701 zip code are in Silver Bow 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 Butte?

Radon mitigation in Butte 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 Butte?

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