Radon testing and mitigation for South Dakota homes
Tell us your test result or your closing date. We'll connect you with a certified radon contractor near you for a free quote.
Serving the Sioux Falls area and the Black Hills. 605 Radon is a referral service; contractors do the work.
What's your radon number?
Enter your test result, or drag the slider.
Sources: EPA (US average, action level); American Lung Association data (Minnehaha County); EPA as reported by Dakota News Now (SD average).
How it works
One call or form, and you're talking to someone who can fix it.
Tell us about your home
Call or send the form with your town, your test result if you have one, and any deadline.
We connect you with a local contractor
We pass your request to an independent, certified radon contractor who serves your area.
Get your quote
The contractor contacts you, quotes the job and, if you hire them, installs and retests the system.
What we can help with
Radon mitigation
A fan and pipe system that pulls radon from under your foundation and vents it above the roof.
Learn moreBuying or selling a home
High result on an inspection? Get a quote that fits your closing timeline.
Learn moreRadon testing
Short-term and long-term tests, including professional continuous monitors for real estate.
Learn moreFan replacement and repair
Existing system gone quiet, or the gauge reads even? Fans wear out after about a decade.
Learn moreWhy radon matters here
Radon is a radioactive gas that comes from the natural breakdown of uranium in soil and rock. You can't see it or smell it. It seeps into homes through the foundation and builds up indoors, especially in basements.
The EPA lists radon as the leading cause of lung cancer among people who have never smoked. South Dakota's soils make high readings common across the state.
- 6 in 10South Dakota homes tested were above the EPA action level
- 4.0pCi/L is the level where the EPA recommends fixing your home
- 21,000US lung cancer deaths each year are linked to radon, by EPA estimate
- Zone 1Eastern South Dakota's EPA radon zone, the highest category
Sources: American Lung Association data, reported by Dakota News Now (2023); EPA, Health Risk of Radon; South Dakota DANR, Radon.
Areas we serve
We connect homeowners with contractors in two regions. Request a quote from anywhere in South Dakota and we'll do our best to help.
Sioux Falls area
Black Hills
What mitigation costs
The state of South Dakota estimates a typical system costs about $1,200 to install and about $3 a month to run. Finished basements, crawl spaces and homes with more than one foundation type can cost more.
Is radon really a problem in South Dakota?
Yes. American Lung Association data shows about six in ten South Dakota homes that were tested came back above the EPA's action level, and the state ranked first in the nation for average radon reading in its 2022 report.
Who will I be talking to?
When you call or send the form, we connect you with an independent radon contractor who serves your town. They give you the quote and do the work. 605 Radon doesn't install systems itself.
Does this cost me anything?
No. The referral and the quote are free, and you're never obligated to hire anyone. Contractors may pay us for the referral.
How long does a mitigation system take to install?
Most homes take about a day. A good contractor will test afterward to confirm the system brought your level down.
Get a free radon quote
Send a few details and a certified contractor who serves your town will contact you. Prefer to talk? Call (605) 496-9929.