Onida, SD Radon Mitigation and Testing

Q: What EPA Radon Zone is Onida in?

Onida is in Sully County, EPA Zone 1.

Q: How much does radon mitigation cost in Onida?

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

Sully County

EPA Zone 1

Located in central South Dakota's Sully County, Onida sits over glacial deposits and Pierre Shale formations that contribute to South Dakota's generally elevated radon potential across the region. The town's housing stock reflects typical Great Plains construction with most homes featuring full basements where radon gas can accumulate effectively. Given that comprehensive radon testing data for zip code 57564 is still developing, homeowners should conduct testing to understand their specific radon exposure levels.

Onida, SD Radon Mitigation

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

Onida, SD Radon Testing

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

Onida Radon Facts

Key details about the radon risk profile for Onida and the 57564 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Sully County, SD

Zip Code

57564

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Onida and the 57564 zip code are located in Sully 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 Onida, SD

What EPA Radon Zone is Onida in?

Onida and the 57564 zip code are in Sully 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 Onida?

Radon mitigation in Onida 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 Onida?

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