Winthrop, MN Radon Mitigation and Testing

Q: What EPA Radon Zone is Winthrop in?

Winthrop is in Sibley County, EPA Zone 1.

Q: How much does radon mitigation cost in Winthrop?

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

Sibley County

EPA Zone 1

Located in south-central Minnesota's Sibley County, Winthrop sits on deep glacial drift deposits over sedimentary bedrock formations characteristic of the region's agricultural landscape. The small town's housing stock consists mainly of older residential construction with full basements, reflecting Minnesota's traditional building practices for cold climate durability. Since comprehensive radon testing data is not available for zip code 55396, local homeowners should consider testing given Minnesota's geological conditions and basement construction prevalence.

Winthrop, MN Radon Mitigation

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

Winthrop, MN Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Winthrop Radon Facts

Key details about the radon risk profile for Winthrop and the 55396 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Sibley County, MN

Zip Code

55396

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Winthrop and the 55396 zip code are located in Sibley County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Winthrop, MN

What EPA Radon Zone is Winthrop in?

Winthrop and the 55396 zip code are in Sibley 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.

How much does radon mitigation cost in Winthrop?

Radon mitigation in Winthrop 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 Winthrop?

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.

Most Active Radon Markets in Minnesota

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Savage	5.00 pCi/L	3
Faribault	10.00 pCi/L	2
Shakopee	6.50 pCi/L	2
Minneapolis	5.00 pCi/L	2
Lakeville	6.00 pCi/L	1
Delano	5.00 pCi/L	1
Montgomery	5.00 pCi/L	1
Rosemount	No submissions	0