Preston, MN Radon Levels

Q: What EPA Radon Zone is Preston in?

Preston is in Fillmore County, EPA Zone 1.

Q: How much does radon mitigation cost in Preston?

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

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

Preston, MN Radon Facts

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

County Fillmore County, MN

Zip Code 55965

Located in Fillmore County within the Rochester Metro area, Preston sits in southeastern Minnesota's karst landscape where limestone bedrock creates underground cave systems. Testing data for this ZIP code 55965 community remains limited, making professional radon testing essential for homeowners. The region's geological conditions and typical basement construction in Minnesota homes warrant careful attention to indoor air quality.

7.17

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.17 pCi/L, based on 6 tests from 5 nearby cities. No readings have been submitted for Preston 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+

Preston, 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 Preston, MN

No homeowner tests have been submitted for Preston 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
Le Roy	22.5 mi	8.00 pCi/L	1
Winona	32.0 mi	10.00 pCi/L	1
Minnesota City	33.9 mi	7.00 pCi/L	1
La Crescent	40.1 mi	7.50 pCi/L	2
Lyle	42.9 mi	3.00 pCi/L	1

Fillmore County Radon Profile

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

Radon FAQ for Preston, MN

What EPA Radon Zone is Preston in?

Preston and the 55965 zip code are in Fillmore 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 Preston?

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

Radon mitigation in Preston 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 Preston?

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.