Pennington County's leading radon mitigation provider — protecting families from South Dakota's #1 indoor health hazard.
Rapid City, the county seat of Pennington County and the second-largest city in South Dakota with approximately 77,000 residents, sits directly in one of the highest radon zones in the United States. The EPA classifies Pennington County as Zone 1, meaning the predicted average indoor radon screening level exceeds 4 pCi/L — the threshold at which mitigation is strongly recommended. South Dakota consistently ranks as the state with the highest average indoor radon levels in the nation, and Rapid City is ground zero for this invisible threat.
Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil and rock. It seeps into homes through cracks in foundations, gaps around pipes, and porous concrete. Because radon is colorless, odorless, and tasteless, the only way to know if your Rapid City home has elevated levels is through professional testing. Long-term exposure to high radon concentrations is the second leading cause of lung cancer in the United States, responsible for an estimated 21,000 deaths annually.
The geology beneath Rapid City creates ideal conditions for radon accumulation. The Black Hills region is rich in granite and other igneous rocks that contain higher-than-average concentrations of uranium. As this uranium decays, radon gas migrates upward through fractured limestone and permeable soils directly into residential foundations. The city's continental climate — with cold winters that keep homes sealed tight — further concentrates indoor radon to dangerous levels.
Many Rapid City homes were built with poured concrete or block foundations directly on bedrock or shallow soils, creating short pathways for radon to enter living spaces. Older neighborhoods near Canyon Lake, Robbinsdale, and the West Boulevard Historic District often have basements with minimal vapor barriers. Newer developments in areas like Tuscany Hills and The Foothills may have modern construction, but without an active radon mitigation system, even new homes regularly test above the EPA action level.
We provide comprehensive radon solutions for homeowners, renters, property managers, and real estate professionals throughout Rapid City and greater Pennington County.
From the established neighborhoods along Jackson Boulevard and Quincy Street to the growing communities near Rapid Valley and South Canyon, our team serves all of Rapid City. Whether you are buying or selling a home near the South Dakota School of Mines and Technology, managing rental properties downtown, or protecting your family in a suburban development off Elk Vale Road, we deliver fast, reliable radon mitigation with guaranteed results below 4 pCi/L.
Rapid City is home to iconic landmarks like Storybook Island, Dinosaur Park, and the Chapel in the Hills, and its residents deserve to breathe clean air inside their own homes. With the Pennington County average indoor radon level significantly above the national average, testing and mitigation are not optional — they are essential. We offer same-day appointments, free on-site estimates, and most installations are completed in a single day.
Concerned about radon in your Rapid City home? Contact us for a free estimate. We serve all of Pennington County and the greater Black Hills region.
Rapid City is surrounded by the Black Hills — beautiful terrain built on geology that produces some of the highest radon levels in the United States. Uranium naturally occurs in the granite and metamorphic rocks throughout Pennington County, and as it decays, it releases radon gas that migrates through soil and rock into homes. The EPA estimates that nearly 1 in 15 homes nationally has elevated radon, but in South Dakota, that number is far higher — with the state averaging over 9 pCi/L compared to the national average of about 1.3 pCi/L.
Many Rapid City homeowners don't test because they've never had symptoms and their home looks fine. But radon causes no symptoms until lung cancer develops — often years or decades after the exposure. The risk is real, cumulative, and preventable with modern mitigation technology. Badlands Radon exists to close the gap between Rapid City's high radon risk and the number of homes that have been properly tested and mitigated.
Our sub-slab depressurization systems are proven effective, installed in a day, and backed by a performance guarantee. We test after installation to confirm your home meets EPA guidelines. Whether you're in north Rapid City, the South Robbinsdale area, West Boulevard, or the Skyline Drive corridor, we serve all of Rapid City with the same professional service. Call (605) 640-5642 for a free estimate.