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Radon Testing in Billings, MT

Accurate, EPA-approved radon testing for homes and businesses across Yellowstone County. Get results you can trust from licensed and insured professionals.

Continuous radon monitor on a side table in a finished basement

Why Radon Testing Matters in Billings

Radon is a naturally occurring radioactive gas produced by the decay of uranium found in soil and rock beneath your home. It enters through foundation cracks, construction joints, gaps around pipes, and any opening where the building meets the ground. In Billings and throughout Yellowstone County, the geological composition of the soil creates conditions where radon concentrations frequently exceed safe thresholds. The EPA classifies much of Montana as Zone 1 for radon risk, meaning predicted average indoor screening levels exceed 4 pCi/L, the federal action level.

Radon is completely invisible, odorless, and tasteless, which makes professional testing the only reliable way to determine if your home has elevated levels. It is the second leading cause of lung cancer in the United States, responsible for an estimated 21,000 deaths each year. Testing is straightforward, affordable, and could protect your family's health for years to come.

Types of Radon Tests We Offer

Short-term radon tests run for 2 to 7 days and provide a quick snapshot of radon concentrations in your home. These tests are ideal for real estate transactions, initial screenings, and situations where fast results are needed. Our short-term testing uses continuous radon monitors (CRMs) that record hourly measurements, delivering detailed data about how levels fluctuate throughout the test period.

Long-term radon tests run for 90 days or more and provide a more accurate picture of your home's year-round average radon exposure. We recommend long-term testing whenever time permits, because radon levels fluctuate with weather patterns, soil moisture, barometric pressure, and seasonal changes common across the Billings area. For the most comprehensive understanding of your exposure, continuous monitoring devices can track radon levels in real time and alert you to any spikes.

See our radon pricing guides page for the details.

Understanding Your Results

After testing is complete, our licensed technicians analyze the data and provide a detailed report showing your home's radon concentration measured in picocuries per liter (pCi/L). If your results fall below 2 pCi/L, your home is within acceptable levels, though we recommend retesting every two years since conditions can change. Results between 2 and 4 pCi/L fall in a range where the EPA suggests considering mitigation, as there is no known safe level of radon exposure.

For results at or above the EPA action level of 4 pCi/L, we strongly recommend installing a radon mitigation system as soon as possible. Our team can discuss mitigation options immediately after testing and often schedule installation within days. We also offer bundled pricing when you combine testing with mitigation, applying the cost of your test toward the total project price.

Benefits of Professional Radon Testing

  • EPA-approved testing methods and calibrated equipment
  • Short-term results available in 48 to 96 hours
  • Long-term and continuous monitoring options
  • Detailed reporting with clear recommendations
  • Free consultation and same-day scheduling available
  • Licensed and insured technicians
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Protect Your Family from Radon

Schedule a professional radon test today. Same-day service available for Billings and surrounding areas.

Call (406) 476-7479

Radon Testing in Billings: What the Process Looks Like

Testing for radon is the essential first step before any mitigation decision can be made. Without a test, you have no way of knowing whether your home has an elevated radon problem — and because radon is invisible and odorless, there are no symptoms to watch for. The only way to know is to measure.

Rimrock Radon offers professional radon testing using both short-term and long-term measurement devices. For most homeowners, we recommend a short-term test (48 to 96 hours) using a charcoal canister or electronic monitor placed in the lowest livable level of the home. The test is closed-house, meaning windows and exterior doors should be kept closed during the testing period except for normal entry and exit. This produces results that are comparable to long-term averages and meet EPA measurement guidelines.

When the test period ends, we retrieve the device and process the results. If your home tests at or above 4 pCi/L, we'll walk you through your mitigation options and provide a free estimate for system installation. If your levels are below the action level, we'll recommend a re-test timeline based on your home's construction and risk factors. Testing is quick, affordable, and the only accurate way to protect your family. Call (406) 476-7479 to schedule your Billings radon test.

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