De Smet, SD Radon Mitigation and Testing

Q: What EPA Radon Zone is De Smet in?

De Smet is in Kingsbury County, EPA Zone 1.

Q: How much does radon mitigation cost in De Smet?

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

Kingsbury County

EPA Zone 1

Situated in east-central Kingsbury County, De Smet sits on glacial till deposits over Pierre Shale that contribute to South Dakota's significant radon potential. While testing data for zip code 57231 remains limited, the region's uranium-bearing geological formations typically produce elevated radon levels. This small prairie community's homes, many with basements to accommodate severe weather, should consider radon testing given the area's high-risk geological characteristics.

De Smet, SD Radon Mitigation

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

De Smet, SD Radon Testing

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

De Smet Radon Facts

Key details about the radon risk profile for De Smet and the 57231 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Kingsbury County, SD

Zip Code

57231

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

De Smet and the 57231 zip code are located in Kingsbury 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 De Smet, SD

What EPA Radon Zone is De Smet in?

De Smet and the 57231 zip code are in Kingsbury 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 De Smet?

Radon mitigation in De Smet 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 De Smet?

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

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