Sioux Falls sits in eastern South Dakota, which the state places in the EPA's Zone 1, the highest predicted radon category. Radon test results gathered by the American Lung Association put the estimated average for Minnehaha County at 6.5 pCi/L across nearly 2,000 tests. That's well above the EPA's 4.0 action level.
A county average doesn't tell you what's in your house. Two homes on the same block can test very differently depending on the foundation, the soil underneath and how the basement is used. The only way to know is to test.
What we hear from Sioux Falls homeowners
- Home sales on a deadline. Radon tests are a routine part of home inspections here, and a high result can put a closing date at risk. We can usually connect you with a contractor who can quote quickly.
- Finished basements. Many Sioux Falls basements are finished living space. A good installer can route the pipe through a closet, utility room or garage so it stays out of sight.
- Older systems. Homes that were mitigated years ago may have a fan near the end of its life. The state estimates a radon fan lasts about 11 years.
Neighborhoods and nearby towns
We take requests from every part of Sioux Falls, from the older neighborhoods around downtown to newer development on the east and southwest sides, plus nearby Brandon, Harrisburg, Tea and Hartford.
Get a radon quote in Sioux Falls
Call (605) 496-9929 or request a quote online. We'll connect you with an independent, certified radon contractor who serves Sioux Falls. The referral is free and there's no obligation.
Sources: South Dakota DANR, Radon; American Lung Association data, reported by Dakota News Now (2023); EPA, Health Risk of Radon.