Granite Falls, MN Radon Levels

Q: What EPA Radon Zone is Granite Falls in?

Granite Falls is in Yellow Medicine County, EPA Zone 1.

Q: How much does radon mitigation cost in Granite Falls?

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

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

Granite Falls, MN Radon Facts

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

County Yellow Medicine County, MN

Zip Code 56241

Positioned in rural Yellow Medicine County in southwestern Minnesota, Granite Falls sits within EPA Zone 1 where glacial deposits over Precambrian granite create high radon potential. Testing data for zip code 56241 remains limited, making individual home testing essential for residents. The area's combination of older homes with basements and granite bedrock geology typically produces elevated radon levels throughout the region.

14.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 14.00 pCi/L, based on 1 test from 1 nearby city. No readings have been submitted for Granite Falls 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+

Granite Falls, 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 Granite Falls, MN

No homeowner tests have been submitted for Granite Falls 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
Willmar	33.4 mi	14.00 pCi/L	1

Yellow Medicine County Radon Profile

Because of its underlying geology, Yellow Medicine 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 Yellow Medicine 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 Yellow Medicine County home regardless of zone or a neighbor's results.

Radon FAQ for Granite Falls, MN

What EPA Radon Zone is Granite Falls in?

Granite Falls and the 56241 zip code are in Yellow Medicine 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 Granite Falls?

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

Radon mitigation in Granite Falls 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 Granite Falls?

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.