Letcher, SD Radon Levels

Q: What EPA Radon Zone is Letcher in?

Letcher is in Sanborn County, EPA Zone 1.

Q: How much does radon mitigation cost in Letcher?

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

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

Letcher, SD Radon Facts

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

County Sanborn County, SD

Zip Code 57359

Positioned in Sanborn County on South Dakota's prairie, Letcher sits within EPA Zone 1 where glacial deposits over Pierre Shale create high radon potential. Testing data for zip code 57359 remains unavailable, making baseline radon testing essential for all residents. The community's rural housing stock may be particularly vulnerable to radon accumulation in below-grade spaces.

Letcher, 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 Letcher, SD

What EPA Radon Zone is Letcher in?

Letcher and the 57359 zip code are in Sanborn 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 Letcher?

Radon mitigation in Letcher 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 Letcher?

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