Spencer, SD Radon Mitigation and Testing

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.

McCook County

EPA Zone 1

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.

Spencer, SD Radon Testing

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

Spencer Radon Facts

Key details about the radon risk profile for Spencer and the 57374 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

McCook County, SD

Zip Code

57374

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Spencer and the 57374 zip code are located in McCook 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 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 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