Alexandria, SD Radon Levels

Q: What EPA Radon Zone is Alexandria in?

Alexandria is in Hanson County, EPA Zone 1.

Q: How much does radon mitigation cost in Alexandria?

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

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

Alexandria, SD Radon Facts

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

County Hanson County, SD

Zip Code 57311

Alexandria sits in Hanson County on South Dakota's glaciated prairie, where Cretaceous shale bedrock beneath glacial till creates the region's geological foundation. The area's EPA Zone 1 designation suggests generally lower radon potential across this agricultural region. With limited testing data available for zip code 57311, local homeowners should still conduct radon testing to understand their individual property's radon profile.

Alexandria, SD Radon Mitigation

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

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Radon FAQ for Alexandria, SD

What EPA Radon Zone is Alexandria in?

Alexandria and the 57311 zip code are in Hanson 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 Alexandria?

Radon mitigation in Alexandria 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 Alexandria?

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 South Dakota

Cities in South Dakota with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Spearfish	7.75 pCi/L	4
Rapid City	10.50 pCi/L	2
Aberdeen	8.50 pCi/L	2
Sioux Falls	6.00 pCi/L	2
Watertown	6.00 pCi/L	2