Certified short-term and long-term radon testing for homes and businesses across the Black Hills. Fast, accurate results you can trust.
Radon testing is the only reliable method for determining whether your home has dangerous levels of radon gas. Radon is a naturally occurring, radioactive gas that is produced by the decay of uranium in soil and rock beneath your foundation. It is completely invisible, odorless, and tasteless, which means you cannot detect it without specialized equipment. In Rapid City and across Pennington County, radon is a serious health concern because the Black Hills region sits on uranium-rich granite and Pierre Shale formations that produce radon at rates far above the national average.
The Environmental Protection Agency has established 4 pCi/L (picocuries per liter) as the action level for indoor radon. Any home that tests at or above this threshold should have a mitigation system installed. South Dakota's statewide average indoor radon concentration exceeds 9 pCi/L, more than double the EPA action level, and many Rapid City homes test well above 15 pCi/L. The South Dakota Department of Health recommends that every home in the state be tested regardless of age, foundation type, or neighborhood.
We offer both short-term and long-term radon testing to give you the clearest possible picture of your home's radon exposure. Our certified technicians use continuous radon monitors (CRMs) that record hourly readings over a minimum 48-hour testing window, providing detailed data rather than a simple average. For homeowners who want year-round insight, we also offer long-term alpha track testing over 90 or more days to capture seasonal fluctuations caused by South Dakota's harsh winters and the stack effect.
Short-term radon tests are the standard screening method and are the protocol used in virtually all real estate transactions across South Dakota. These tests run for 48 to 96 hours under closed-house conditions and deliver fast, actionable results. They are ideal for homebuyers who need answers before closing, homeowners screening for the first time, and anyone who wants quick confirmation of their home's radon status.
Long-term tests run for 90 days or more and use alpha track detectors to measure your home's average radon concentration across seasons. Because radon levels in the Black Hills can spike during winter months when homes are sealed tight and frozen ground traps gas beneath the foundation, long-term testing is especially valuable for homes that test near the 4 pCi/L action level on a short-term screening.
Getting your home tested is simple, and we handle every step from scheduling through results delivery.
Call us or fill out our form. We typically schedule tests within 24 hours.
We place a certified CRM in the lowest livable area of your home under closed-house conditions.
The CRM continuously records hourly radon concentrations throughout the test period.
We deliver a detailed report. If levels exceed 4 pCi/L, we provide a free mitigation estimate.
Every home in the Rapid City area should be tested for radon. Whether you are buying, selling, or simply want peace of mind, our certified testing gives you the answers you need to protect your family. Call us today at (605) 640-5642 or request your free estimate online.
Schedule Radon TestingWe follow a proven, step-by-step approach to every radon testing project — from initial assessment through final inspection. Every job is completed to code and backed by our satisfaction guarantee.