Saint Lawrence, SD Radon Mitigation and Testing

Q: What EPA Radon Zone is Saint Lawrence in?

Saint Lawrence is in Hand County, EPA Zone 1.

Q: How much does radon mitigation cost in Saint Lawrence?

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

Hand County

EPA Zone 1

Positioned in Hand County on the South Dakota prairie, Saint Lawrence sits atop glacial till deposits that can facilitate radon gas migration from underlying bedrock. The area's housing stock includes many older farmsteads and newer rural residences, often with partial basements or crawl spaces. Given the lack of local testing data and South Dakota's elevated radon potential, homeowners should prioritize professional radon testing.

Saint Lawrence, SD Radon Mitigation

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

Saint Lawrence, SD Radon Testing

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

Saint Lawrence Radon Facts

Key details about the radon risk profile for Saint Lawrence and the 57373 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Hand County, SD

Zip Code

57373

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Saint Lawrence and the 57373 zip code are located in Hand 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 Saint Lawrence, SD

What EPA Radon Zone is Saint Lawrence in?

Saint Lawrence and the 57373 zip code are in Hand 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 Saint Lawrence?

Radon mitigation in Saint Lawrence 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 Saint Lawrence?

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