Marshall, MN Radon Levels

Q: What EPA Radon Zone is Marshall in?

Marshall is in Lyon County, EPA Zone 1.

Q: How much does radon mitigation cost in Marshall?

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

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

Marshall, MN Radon Facts

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

County Lyon County, MN

Zip Code 56258

Established in southwestern Minnesota's Lyon County, Marshall sits within the prairie region where glacial deposits over sedimentary bedrock can produce variable radon conditions. Testing data for zip code 56258 is currently limited, making individual home testing important for residents. Minnesota's diverse geology can create localized radon variations that warrant professional assessment.

Marshall, MN Radon Mitigation

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

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EPA Radon Zones Near Marshall, MN

No user-submitted radon readings are available for Marshall or its immediate area yet. The table below shows the EPA radon zone — a county-level prediction of radon risk — for nearby communities. Radon still varies from home to home, so testing is the only way to confirm your level.

City	Distance	County	EPA Radon Zone
Milroy	11.1 mi	Redwood County	Zone 1
Hanley Falls	16.6 mi	Yellow Medicine County	Zone 1
Taunton	16.9 mi	Lyon County	Zone 1
Wood Lake	17.6 mi	Yellow Medicine County	Zone 1
Lucan	18.3 mi	Redwood County	Zone 1
Vesta	18.6 mi	Redwood County	Zone 1
Walnut Grove	20.6 mi	Redwood County	Zone 1
Arco	20.9 mi	Lincoln County	Zone 1

Lyon County Radon Profile

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

Radon FAQ for Marshall, MN

What EPA Radon Zone is Marshall in?

Marshall and the 56258 zip code are in Lyon 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.

What EPA radon zones surround Marshall, MN?

Marshall sits in Lyon County, which the EPA classifies as Radon Zone 1. Among the nearby communities listed above, 8 in Zone 1 (high risk, predicted above 4 pCi/L). EPA radon zones are county-level predictions of radon potential, so the EPA recommends testing every individual home regardless of its zone, since levels vary from house to house.

How much does radon mitigation cost in Marshall?

Radon mitigation in Marshall 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 Marshall?

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.