Sioux Falls, SD Radon Mitigation and Testing

Q: What is the average radon level in Sioux Falls, SD?

Based on 2 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Sioux Falls in?

Sioux Falls is in Minnehaha County, EPA Zone 1.

Q: How much does radon mitigation cost in Sioux Falls?

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

Avg: 6.00 pCi/L

Minnehaha County

EPA Zone 1

2 user tests

Homes in the 57108 zip code of Sioux Falls, located in Lincoln County, show an average radon level of 6.0 pCi/L, which exceeds the EPA action threshold. The area's glacial till deposits over Sioux Quartzite bedrock contribute to elevated radon potential throughout the metro region. Given these concerning levels, all residents should test their homes and consider mitigation if readings exceed 4.0 pCi/L.

6.00

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Sioux Falls, SD. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Sioux Falls, SD Radon Mitigation

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

Sioux Falls, SD Radon Testing

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

Sioux Falls, South Dakota Radon Levels

User-submitted radon test readings from homes in the Sioux Falls area.

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Sioux Falls, SD	0-20 Years	Full Basement	Jan 2023
7 pCi/L	Sioux Falls, SD	0-20 Years	Full Basement	Mar 2018

Have a radon test result for Sioux Falls? Submit your reading to help other homeowners.

Sioux Falls Radon Facts

Key details about the radon risk profile for Sioux Falls and the 57103 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Minnehaha County, SD

Zip Code

57103

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Sioux Falls and the 57103 zip code are located in Minnehaha 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 Sioux Falls, SD

What is the average radon level in Sioux Falls, SD?

Based on 2 user-submitted tests, the average radon level in Sioux Falls is 6.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Sioux Falls in?

Sioux Falls and the 57103 zip code are in Minnehaha 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 Sioux Falls?

Radon mitigation in Sioux Falls 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 Sioux Falls?

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