Hamilton, MT Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 11.00 pCi/L.

Q: What EPA Radon Zone is Hamilton in?

Hamilton is in Ravalli County, EPA Zone 1.

Q: How much does radon mitigation cost in Hamilton?

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

Avg: 11.00 pCi/L

Ravalli County

EPA Zone 1

1 user test

Hamilton in Ravalli County shows an average radon reading of 11.0 pCi/L, nearly triple the EPA's 4.0 pCi/L action level and requiring immediate attention. Nestled in the Bitterroot Valley (zip code 59840), this western Montana community sits atop granite and metamorphic bedrock that naturally produces elevated radon levels. Given these significantly high readings and the area's mix of mountain valley homes with varying foundation types, all local residents should test their properties and strongly consider professional radon mitigation systems.

11.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Hamilton, MT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Hamilton, MT Radon Mitigation

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

Hamilton, MT Radon Testing

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

Hamilton, Montana Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
11 pCi/L	Hamilton, MT	21-50 Years	No Basement/All Crawl Space	Oct 2022

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

Hamilton Radon Facts

Key details about the radon risk profile for Hamilton and the 59840 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Ravalli County, MT

Zip Code

59840

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

11.00 pCi/L

User Tests Submitted

Hamilton and the 59840 zip code are located in Ravalli 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 Hamilton, MT

What is the average radon level in Hamilton, MT?

Based on 1 user-submitted test, the average radon level in Hamilton is 11.00 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 Hamilton in?

Hamilton and the 59840 zip code are in Ravalli 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 Hamilton?

Radon mitigation in Hamilton 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 Hamilton?

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