Sheridan, MT Radon Mitigation and Testing

Q: What EPA Radon Zone is Sheridan in?

Sheridan is in Madison County, EPA Zone 1.

Q: How much does radon mitigation cost in Sheridan?

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

Madison County

EPA Zone 1

Positioned in Madison County among the mountain valleys of southwestern Montana, Sheridan sits in an EPA Zone 1 area where geological conditions can produce elevated radon levels. Local housing includes ranch-style homes and mountain properties with varying foundation types suited to the region's climate. Given the limited testing data available and Montana's known radon potential, homeowners should prioritize professional radon testing.

Sheridan, MT Radon Mitigation

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

Sheridan, MT Radon Testing

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

Sheridan Radon Facts

Key details about the radon risk profile for Sheridan and the 59749 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Madison County, MT

Zip Code

59749

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Sheridan and the 59749 zip code are located in Madison 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 Sheridan, MT

What EPA Radon Zone is Sheridan in?

Sheridan and the 59749 zip code are in Madison 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 Sheridan?

Radon mitigation in Sheridan 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 Sheridan?

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