Radon Mitigation in Sioux Falls
DANR says even very high radon levels can be brought down to acceptable levels. Here's the system it describes, how to find a certified installer, and what a good Sioux Falls install should include.
The system DANR describes
EPA generally recommends methods that keep radon from entering the house, and DANR points to active soil depressurization as one of them.1 It's PVC pipe connected to the soil through a hole in the slab, a sump lid, or beneath a plastic sheet in a crawl space. A quiet fan on the pipe runs continuously and vents the radon to a safe spot outside.1
How radon gets in
DANR says radon enters through foundation cracks, utility penetrations, sumps and floor drains. Permeable soil and pressure differences in the building pull more of it in.1 That's why the sump and slab details matter when a contractor designs the system.
Finding a certified installer
DANR's radon page links to the residential mitigation providers certified by the National Radon Proficiency Program (NRPP) and the National Radon Safety Board (NRSB).1 Search either directory by your ZIP, choose a mitigation (not measurement) credential, and confirm it's current before you sign.
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- The installer's NRPP or NRSB certification and its type.1
- Diagnostic testing before design, and a post-installation test.2
- A gauge or alarm showing the fan is working.2
- A guarantee to reach 4 pCi/L or below, and how long it lasts.2
After installation
Retest between 24 hours and 30 days after the fan starts, ideally with an independent tester, then at least every two years, per National Radon Program Services.3
Areas we serve
We match homeowners across the Sioux Falls area, including these communities and ZIP codes:
- Sioux Falls57103 · 57104 · 57105 · 57106 · 57108 · 57110 · 57117 · 57197
- Brandon57005
- Harrisburg57032
- Tea57064
- Hartford57033
- Dell Rapids57022
- Crooks57020
- Baltic57003
ZIP codes are 2020 Census ZIP Code Tabulation Areas, which closely approximate USPS ZIP codes. We list ZIPs that make up a substantial share of each community, so edge ZIPs that barely touch a town are left out, and some ZIPs span two towns.4 Not on the list? Send the form anyway, and we'll tell you if we can help.
Common questions
What kind of radon system is used in Sioux Falls homes?
DANR describes active soil depressurization: PVC pipe connected to the soil under the slab, at the sump or under plastic in a crawl space, with a continuously running fan that vents radon outside.
Can very high radon levels be fixed?
Yes. DANR says even very high levels can be reduced to acceptable levels.
How do I find a certified radon mitigator in South Dakota?
DANR's radon page links to the residential mitigation providers certified by NRPP and NRSB. Search by ZIP and confirm the certification is current.
How soon should I retest after a system is installed?
National Radon Program Services says to retest between 24 hours and 30 days after the fan starts, then at least every two years.
General information summarized from the public sources listed below. It isn't professional, medical or legal advice. A licensed professional who inspects your home can tell you what it needs.
Sources
- South Dakota Department of Agriculture and Natural Resources (DANR), "Radon"
- U.S. EPA, "Consumer's Guide to Radon Reduction: How to Fix Your Home" (2010)
- National Radon Program Services (Kansas State University, EPA-funded), "Installing Mitigation"
- U.S. Census Bureau, 2020 ZCTA-to-place and ZCTA-to-county-subdivision relationship files