Sevier County, Utah
Radon Levels in Monroe, Utah
12.7
pCi/L avg
90
tests analyzed
4.7×
WHO threshold
Risk level
12.7
Monroe average
6.5
Sevier County avg(+95%)
4.4
Utah statewide avg(+189%)
Monroe radon levels decreased 0% year over year
The average moved from 14 pCi/L to 12.7 pCi/L (0 pCi/L) as the dataset expanded to 90 total tests.
What 12.7 pCi/L Means for Monroe Homeowners
Significantly Elevated — Mitigation Strongly Recommended
This area tests at more than 2× the EPA action level of 4.0 pCi/L. Mitigation is strongly recommended for any home in this area that hasn't been recently tested and mitigated. Long-term exposure to radon at these levels can more than double lung cancer risk for non-smokers, and compound the risk dramatically for smokers.
The 12.7 pCi/L average for Monroe is based on 90 pre-mitigation test results from real homes in the area, analyzed by Alpha Energy Laboratories — the independent EPA-certified lab that processes the majority of Utah radon tests. This is not a modeled estimate or a projection — it reflects actual measurements.
That said, averages don't capture the full picture. In any city, some homes test at 2 pCi/L while others in the same neighborhood test at 15 pCi/L or higher. Foundation type (basement vs. crawl space vs. slab), soil porosity, construction materials, and ventilation all affect how much radon enters from the soil. A home on one street can test very differently from a home on the adjacent block.
There is no safe level of radon. Radon is a Class A carcinogen — the same classification as asbestos and benzene. Long-term exposure is responsible for approximately 21,000 lung cancer deaths in the US each year. Unlike many home hazards, radon exposure is completely invisible and odorless, making testing the only way to know your risk.
Should You Test Your Monroe Home?
Yes — regardless of whether your home is brand new or decades old. Radon enters through cracks in foundations, construction joints, and gaps around pipes. Both new and older homes can have high radon levels, and a home that tested low previously may have changed as settling, renovations, or soil shifts have occurred.
The EPA and WHO recommend testing every home at least once, and retesting after major renovations, if a mitigation system has been installed, or if you move into a previously untested property. In Sevier County, where the average is 6.5 pCi/L, testing is especially important.
Utah Radon provides free certified test kits to any Utah homeowner. The short-term test takes 48–96 hours and is placed in the lowest livable level of your home. You mail it back in the prepaid envelope, and Alpha Energy Laboratories returns results within 2–3 weeks. There is no cost.
Monroe Radon — Frequently Asked Questions
What is the average radon level in Monroe, Utah?
Monroe has an average indoor radon level of 12.7 pCi/L based on 90 pre-mitigation tests analyzed by Alpha Energy Laboratories from 2015 through August 2025. This is 4.7× the WHO's recommended mitigation threshold of 2.7 pCi/L and 3.2× the EPA action level of 4.0 pCi/L. For comparison, Utah's statewide average is 4.4 pCi/L and the US national average is 1.3 pCi/L.
Is Monroe a high-radon area?
Monroe is classified as very high risk. This area tests at more than 2× the EPA action level of 4.0 pCi/L. Mitigation is strongly recommended for any home in this area that hasn't been recently tested and mitigated. Long-term exposure to radon at these levels can more than double lung cancer risk for non-smokers, and compound the risk dramatically for smokers. The most important thing to know is that city averages reflect the mean of many homes — individual properties can test significantly higher or lower than the area average. The only way to know your home's radon level is to test it directly.
How does Monroe's radon compare to Sevier County and Utah overall?
Monroe's average of 12.7 pCi/L is 95% higher than Sevier County's average of 6.5 pCi/L, and 189% higher than Utah's statewide average of 4.4 pCi/L. This data is drawn from 115,601 total Utah tests in the Alpha Energy Laboratories dataset.
How do I get a radon test in Monroe, Utah?
Utah Radon provides free certified radon test kits to all Utah homeowners, including those in Monroe. Request a free kit at utahradon.org/free-test-kit — it's mailed directly to your home. You place the test according to the instructions (typically 48–96 hours in the lowest livable level of your home), mail it back to Alpha Energy Laboratories in the prepaid envelope, and receive your results within 2–3 weeks. The kit, shipping, and lab analysis are all free.
What should I do if my Monroe home tests high for radon?
If your home tests above 2.7 pCi/L (WHO threshold), mitigation is recommended. If it's above 4.0 pCi/L (EPA action level), mitigation is strongly recommended. Radon mitigation systems — typically a sub-slab depressurization system — are installed by certified contractors and can reduce indoor radon levels by 80–99%. Most systems cost between $800 and $2,500 to install and last for the life of the home with minimal maintenance.
Know your radon level in Monroe
With Monroe averaging 12.7 pCi/L — 4.7× the WHO mitigation threshold — testing your specific home is the only way to know your family's true exposure.
Request your free test kit