Fort Thompson, SD Radon Levels

Q: What EPA Radon Zone is Fort Thompson in?

Fort Thompson is in Buffalo County, EPA Zone 1.

Q: How much does radon mitigation cost in Fort Thompson?

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

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

Fort Thompson, SD Radon Facts

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

County Buffalo County, SD

Zip Code 57339

Fort Thompson in Buffalo County falls within South Dakota's EPA Zone 1 high radon potential region, with limited testing data available for zip code 57339. The Missouri River valley location features glacial deposits and Pierre Shale formations that can generate significant radon levels. Residents should prioritize professional radon testing, as South Dakota consistently ranks among the highest states for radon exposure risk.

Fort Thompson, 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 Fort Thompson, SD

What EPA Radon Zone is Fort Thompson in?

Fort Thompson and the 57339 zip code are in Buffalo 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 Fort Thompson?

Radon mitigation in Fort Thompson 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 Fort Thompson?

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