Marion, SD Radon Levels

Q: What EPA Radon Zone is Marion in?

Marion is in Turner County, EPA Zone 1.

Q: How much does radon mitigation cost in Marion?

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

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

Marion, SD Radon Facts

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

County Turner County, SD

Zip Code 57043

Part of the Sioux Falls metropolitan area, this Turner County community sits within South Dakota's glacial prairie where thick till deposits can influence radon behavior. Testing data for Marion remains limited, underscoring the need for individual home testing throughout the region. The area's agricultural setting and typical basement construction practices make radon testing a prudent precaution for homeowners.

Marion, 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 Marion, SD

What EPA Radon Zone is Marion in?

Marion and the 57043 zip code are in Turner 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 Marion?

Radon mitigation in Marion 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 Marion?

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