Green Isle, MN Radon Levels

Q: What EPA Radon Zone is Green Isle in?

Green Isle is in Sibley County, EPA Zone 1.

Q: How much does radon mitigation cost in Green Isle?

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

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

Green Isle, MN Radon Facts

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

County Sibley County, MN

Zip Code 55338

Rural Green Isle in Sibley County sits in Minnesota's south-central prairie region, where glacial till deposits over limestone and sandstone bedrock create variable radon conditions. This small farming community lacks comprehensive testing data, making individual home assessment essential for residents. The area's mix of older farmstead properties and newer rural homes means radon entry potential can vary significantly depending on foundation type and construction era.

6.92

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.92 pCi/L, based on 13 tests from 10 nearby cities. No readings have been submitted for Green Isle yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Green Isle, MN Radon Mitigation

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

Need Radon Mitigation or Testing in Green Isle?

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Radon Readings Near Green Isle, MN

No homeowner tests have been submitted for Green Isle 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
Victoria	21.3 mi	4.00 pCi/L	1
Chaska	21.5 mi	7.00 pCi/L	1
Stewart	22.0 mi	4.00 pCi/L	1
New Prague	23.1 mi	9.00 pCi/L	2
Hutchinson	23.7 mi	7.50 pCi/L	2
Mound	24.9 mi	6.00 pCi/L	1
Shakopee	25.0 mi	6.50 pCi/L	2
Excelsior	26.0 mi	13.00 pCi/L	1

Sibley County Radon Profile

Because of its underlying geology, Sibley County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Direct test data for Sibley County remains limited, so the closest neighboring readings are used here to represent the radon conditions homeowners are likely to encounter. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Sibley County home regardless of zone or a neighbor's results.

Radon FAQ for Green Isle, MN

What EPA Radon Zone is Green Isle in?

Green Isle and the 55338 zip code are in Sibley 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 Green Isle?

No homeowner radon tests have been submitted for Green Isle yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Sibley County average—are the best available indicator of local conditions until Green Isle 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 Green Isle?

Radon mitigation in Green Isle 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 Green Isle?

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.