Radon Mitigation in Harrisburg, SD

Call (605) 210-7667 Lincoln County, 10 miles from Sioux Falls, population about 7,100.

The fastest-growing city in South Dakota over 5,000 people, up nearly 38 percent between 2020 and 2023.

Why radon is a problem in Harrisburg

Harrisburg sits on the Lincoln County uplands south of Sioux Falls, on deep glacial till with a high water table in the low ground near Nine Mile Creek. Deep basements cut into that till and the stack effect does the rest.

What Harrisburg housing is built like

Nearly everything here is post-2000, and a lot of it is post-2015. Newer construction means tighter envelopes, better insulation, and a stronger pressure differential pulling on the soil, which is why the newest houses in the metro frequently test higher than the oldest ones.

Harrisburg's growth has outrun its radon awareness. Thousands of homes here have a passive stack roughed in by the builder that nobody ever activated.

Who calls us from Harrisburg

The single most common Harrisburg conversation starts with somebody assuming they are shopping for a full system and ending up buying a fan. Look in the mechanical room for a capped white pipe before you get quotes. If it is there, the expensive part of the job is already inside your walls and the number is a few hundred dollars rather than fourteen hundred.

Local landmarks and roads in our service area

Crews working Harrisburg cover Harrisburg High School, the Freshman Academy, Journey Elementary, Willow Creek Elementary, Nine Mile Creek, Cliff Avenue south of 85th, South Dakota Highway 11 and Lien Boulevard, and the surrounding rural addresses in Lincoln County.

Radon services available in Harrisburg

• radon mitigation systems for Harrisburg homes

  Sub-slab depressurization systems installed in a day, tested after, guaranteed under 4.0 pCi/L.

• Harrisburg Radon Testing

  Short-term and long-term testing, plus post-mitigation verification tests with lab documentation.

• Fan Replacement & Repair in Harrisburg, SD

  Dead fan, dropped manometer, howling pipe, or a system somebody else installed wrong.

• finished basement systems for Harrisburg homes

  Routing a system through a finished lower level without tearing out drywall you paid for.

• Crawl Space Systems in Harrisburg

  Sealed vapor barrier over exposed soil, then sub-membrane depressurization.

• Sump Pump Sealing in Harrisburg, SD

  Airtight sump lids with a viewing port and float access, tied into the radon system.

• New Construction & Passive Systems in Harrisburg, SD

  Pre-slab rough-ins for builders, and activating passive stacks that were never finished.

• Commercial Mitigation in Harrisburg, SD

  Schools, daycares, clinics, offices, and multifamily buildings, with documentation for compliance files.

What is particular about Harrisburg

The awkward fact about Harrisburg is that its housing is new enough for people to assume it is safe and new enough to test high. Tight envelopes and good insulation create a stronger pressure differential across the slab than a draughty older house does, so the stack effect pulls harder on the soil for the eight months a year this house is heated. Newer construction in Lincoln County frequently comes back above older housing in Sioux Falls, which surprises nearly everybody who hears it.

Common questions from Harrisburg

Scheduling and travel

Growth this fast outruns awareness. Thousands of houses have gone up here in a state with the highest average indoor radon level in the country and no requirement to build radon-resistant, test, or tell anybody. That gap is the entire reason this page exists.

Ready for a number? Call (605) 210-7667 or send the form. Background on pricing is in our Sioux Falls radon cost guide, and the full service list is on the services page.