Spencer, SD Radon Levels

Q: What EPA Radon Zone is Spencer in?

Spencer is in McCook County, EPA Zone 1.

Q: How much does radon mitigation cost in Spencer?

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

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

Spencer, SD Radon Facts

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

County McCook County, SD

Zip Code 57374

Situated in McCook County within the Sioux Falls Metro area, Spencer sits atop thick glacial deposits that can produce elevated radon concentrations throughout southeastern South Dakota's agricultural region. Testing data for this small farming community remains limited, making individual home radon testing particularly important for residents. The area's housing primarily consists of farmsteads, small-town residential properties, and rural homes, many featuring full basements typical of Great Plains construction that provide ideal conditions for radon accumulation.

Spencer, 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 Spencer, SD

What EPA Radon Zone is Spencer in?

Spencer and the 57374 zip code are in McCook 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 Spencer?

Radon mitigation in Spencer 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 Spencer?

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