Kalispell, MT Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 7.50 pCi/L.

Q: What EPA Radon Zone is Kalispell in?

Kalispell is in Flathead County, EPA Zone 1.

Q: How much does radon mitigation cost in Kalispell?

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

Avg: 7.50 pCi/L

Flathead County

EPA Zone 1

2 user tests

Gateway to Glacier National Park in Flathead County, Kalispell's homes have recorded an average radon level of 7.5 pCi/L, significantly exceeding the EPA action threshold. Based on limited testing from 2 submissions in the 59901 area, readings have ranged from 6.0 to 9.0 pCi/L. The Flathead Valley's glacial deposits over sedimentary bedrock create geological conditions highly conducive to radon production and accumulation.

7.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Kalispell, MT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Kalispell, MT Radon Mitigation

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

Kalispell, MT Radon Testing

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

Kalispell, Montana Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Kalispell, MT	0-20 Years	No Basement/All Crawl Space	Apr 2021
9 pCi/L	Kalispell, MT	51-99 Years	Full Basement	Feb 2020

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

Kalispell Radon Facts

Key details about the radon risk profile for Kalispell and the 59901 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Flathead County, MT

Zip Code

59901

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

7.50 pCi/L

User Tests Submitted

Kalispell and the 59901 zip code are located in Flathead 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 Kalispell, MT

What is the average radon level in Kalispell, MT?

Based on 2 user-submitted tests, the average radon level in Kalispell is 7.50 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 Kalispell in?

Kalispell and the 59901 zip code are in Flathead 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 Kalispell?

Radon mitigation in Kalispell 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 Kalispell?

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