Marietta, MN Radon Levels

Q: What EPA Radon Zone is Marietta in?

Marietta is in Lac Qui Parle County, EPA Zone 1.

Q: How much does radon mitigation cost in Marietta?

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

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

Marietta, MN Radon Facts

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

County Lac Qui Parle County, MN

Zip Code 56257

Positioned in Lac Qui Parle County in southwestern Minnesota, Marietta occupies prairie land characterized by deep glacial till deposits over sedimentary bedrock. The community's housing stock reflects its agricultural heritage, with scattered farmsteads and residential properties often featuring basement foundations in older homes. Given the limited radon testing data available for this EPA Zone 1 area, local homeowners should prioritize testing to establish baseline readings.

12.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 12.00 pCi/L, based on 1 test from 1 nearby city. No readings have been submitted for Marietta 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+

Marietta, 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 Marietta, MN

No homeowner tests have been submitted for Marietta 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
Morris	49.6 mi	12.00 pCi/L	1

Lac Qui Parle County Radon Profile

The bedrock and soils beneath Lac Qui Parle County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. User-submitted readings are still sparse within Lac Qui Parle County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. 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 Lac Qui Parle County.

Radon FAQ for Marietta, MN

What EPA Radon Zone is Marietta in?

Marietta and the 56257 zip code are in Lac Qui Parle 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 Marietta?

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

Radon mitigation in Marietta 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 Marietta?

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.