Columbia, SD Radon Mitigation and Testing

Q: What EPA Radon Zone is Columbia in?

Columbia is in Brown County, EPA Zone 1.

Q: How much does radon mitigation cost in Columbia?

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

Brown County

EPA Zone 1

Rural Columbia in Brown County sits within South Dakota's glaciated prairie region, where thick glacial till deposits over sedimentary bedrock can influence radon levels throughout zip code 57433. The area's agricultural landscape features widely scattered residential properties with varying foundation types and construction methods. Since local radon testing data isn't available, homeowners should conduct individual testing to establish baseline levels, particularly important given South Dakota's generally elevated radon potential.

Columbia, SD Radon Mitigation

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

Columbia, SD Radon Testing

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

Columbia Radon Facts

Key details about the radon risk profile for Columbia and the 57433 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Brown County, SD

Zip Code

57433

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Columbia and the 57433 zip code are located in Brown 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 Columbia, SD

What EPA Radon Zone is Columbia in?

Columbia and the 57433 zip code are in Brown 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 Columbia?

Radon mitigation in Columbia 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 Columbia?

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