Underwood, MN Radon Levels

Q: What EPA Radon Zone is Underwood in?

Underwood is in Otter Tail County, EPA Zone 1.

Q: How much does radon mitigation cost in Underwood?

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

Check local Underwood radon levels and find certified testing and mitigation professionals to keep your home safe

Underwood, MN Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Otter Tail County, MN

Zip Code 56586

Located in west-central Minnesota's Otter Tail County, Underwood sits within the state's lake country where glacial deposits over granite bedrock create conditions favorable for radon accumulation. Testing data for this rural community remains limited, making local radon pattern assessment challenging. Given Minnesota's EPA Zone 1 classification, residents of zip code 56586 should prioritize radon testing, especially in homes with basements.

5.00

pCi/L area average

Above EPA Action Level

Otter Tail County average: 5.00 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Underwood itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Underwood, MN Radon Mitigation

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

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Radon Readings Near Underwood, MN

No homeowner tests have been submitted for Underwood yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Fergus Falls	12.4 mi	5.00 pCi/L	2

Otter Tail County Radon Profile

Otter Tail County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 1 city in Otter Tail County average 5.00 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Otter Tail County to test, as levels can differ between neighboring homes.

Radon FAQ for Underwood, MN

What EPA Radon Zone is Underwood in?

Underwood and the 56586 zip code are in Otter Tail 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.

Why are radon readings shown from areas near Underwood?

No homeowner radon tests have been submitted for Underwood yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Otter Tail County average—are the best available indicator of local conditions until Underwood homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Underwood?

Radon mitigation in Underwood 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 Underwood?

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.