Understanding Radon
Radon is a naturally occurring radioactive gas that can build up inside homes. Long-term exposure increases the risk of lung cancer. It’s invisible and odorless, so testing is the only way to know your risk.
Estimates of radon‑related lung cancer come from population‑level models, not diagnosed cases. Cancer registries in Utah — and across the United States — do not record radon as a cause of lung cancer, and doctors cannot determine whether radon caused an individual person’s cancer.
Researchers use large studies of exposure and risk to estimate how many cases might be linked to radon across an entire population. These estimates describe overall risk but should not be interpreted as confirmed case counts.
Even with these limitations, long‑term radon exposure is a well‑established risk factor, and reducing exposure is a practical way to lower overall risk.
No. There is no medical test, biomarker, imaging pattern, or diagnostic category that can identify a specific case of “radon‑induced” lung cancer. Clinical reports do not include radon exposure as a diagnostic factor, and cancer registries do not record radon as a cause.
Because many environmental and genetic influences contribute to lung cancer, individual cases cannot be traced to a single cause. Even so, lowering radon levels is a meaningful way to reduce long‑term risk.
Radon fluctuates naturally with weather, ventilation, and home use. What matters is the long‑term average, not any single reading.
No. It’s a guideline for when to consider mitigation, not a cliff. Levels like 3.9 and 4.1 represent essentially the same long‑term risk.
The EPA recommends mitigation if your home’s radon level is 4.0 pCi/L or higher. Even levels between 2.0–3.9 pCi/L may pose risks, and many families choose to mitigate for added protection.
Radon is a long‑term exposure risk. You have time to understand your options and make a thoughtful decision.
Pets can develop lung cancer, but there is no strong evidence that normal household radon levels — especially those below 4.0 pCi/L — meaningfully increase that risk. Pets also have shorter lifespans, which limits the amount of radon exposure they accumulate.
If a pet spends long hours in a basement, some families choose to reduce radon for peace of mind, but it is not a health requirement. Retesting every two years is the national best practice.
Testing & Mitigation
Radon testing measures the level of radon gas in your home to assess potential health risks. There are two common approaches:
• Charcoal test kits (homeowner use): Small canisters filled with activated charcoal absorb radon particles over a short period (typically 2–7 days). Homeowners place the kit in their home and then mail it to a lab for analysis, providing a snapshot of radon levels.
• Digital monitors (professional use): Certified radon testing professionals use electronic devices that continuously measure radon and provide real-time readings. These monitors track changes over days or months, offering a more detailed picture of long-term exposure.
Both methods help determine whether radon mitigation is needed to reduce risk.
Many families choose to confirm their result — especially if the first test was short‑term or taken during unusual weather. A long‑term test gives the clearest picture.
Short‑term tests bounce around. Long‑term tests smooth out natural variation and show the true average.
Mitigation is the process of reducing radon levels in your home, usually by installing a ventilation system that draws radon gas from beneath the foundation and vents it safely outside.
Most systems can be installed in one day, though complex homes may take longer. After installation, a follow-up test confirms the system is working.
Contractors & Costs
Look for contractors who are certified, transparent about costs, and willing to explain their system design. The Radon Navigator™ badge and pledge system helps identify ethical contractors committed to best practices.
In Utah, typical systems range from $1,500–$3,500, depending on your home’s size and foundation type. Be cautious of unusually low bids that may cut corners.
Some contractors upsell unnecessary components. A standards‑based system is usually straightforward and does not require expensive extras.
A clear scope of work, system design details, warranty terms, and post-installation testing. If these aren’t spelled out, ask for clarification before signing.
Consumer Protection
You have the right to clear information about costs, system design, and expected results. Contractors should provide written documentation and follow recognized standards.
You are entitled to a clear, written contract, a standards‑based system, transparent pricing, and a post‑mitigation test to confirm performance.
Always request a post-installation radon test. A properly installed system should reduce levels below 4.0 pCi/L, often much lower.
High‑pressure sales tactics, vague bids, unclear system design, or refusal to provide references or written contracts are all warning signs.
After Mitigation
Most systems achieve this, but not all. The goal is “as low as reasonably achievable,” and performance depends on home structure and system design.
Every two years is the national best practice — and anytime you make major changes to the home.