Big Falls, MN Radon Levels

Q: What EPA Radon Zone is Big Falls in?

Big Falls is in Koochiching County, EPA Zone 2.

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

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

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

Big Falls, MN Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Koochiching County, MN

Zip Code 56627

Located in Koochiching County near Minnesota's Canadian border, Big Falls sits on ancient Precambrian bedrock overlain by glacial deposits from the last ice age. Testing data for zip code 56627 remains limited, but the area's geological setting typically produces moderate radon potential. Given Minnesota's variable radon patterns and the prevalence of full basements in this northern climate, residents should test their homes regardless of construction era or foundation type.

5.00

pCi/L area average

Above EPA Action Level

Koochiching 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 Big Falls 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+

Big 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 Big Falls, MN

No homeowner tests have been submitted for Big 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
International Falls	34.0 mi	5.00 pCi/L	2

Koochiching County Radon Profile

Koochiching County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 1 city in Koochiching 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. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Koochiching County.

Radon FAQ for Big Falls, MN

What EPA Radon Zone is Big Falls in?

Big Falls and the 56627 zip code are in Koochiching County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Big Falls?

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

Radon mitigation in Big 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 Big 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.