What Utah homes are most likely to have high radon? 

According to a new study released in 2025, 49% of homes in Utah have high radon levels, but how do you know if yours is one of them?

The only way to know if your home has high radon levels is to test for it, but some factors can determine if your home may be more susceptible to higher or lower levels. Here are three factors to consider when testing your home for radon.

The age of the home

Some people think older homes will automatically have radon levels that are higher than normal, but that’s not always true. While some older homes may have damage to their foundations, which can let more radon in, newer homes can still have cracks in the foundation that let radon in. Even more, newer homes tend to be more airtight, which means radon may not escape as quickly and can concentrate inside.

The location of the home

Utah has uranium in the soil throughout the state, and when uranium decays, it turns into radon. While any home in Utah may be at risk, areas with colder temperatures and snow may be at greater risk. When the ground freezes, and radon can’t escape into the outdoor air, more radon is pulled indoors, putting those inside at risk. No matter where you live in the state, you should test your home for radon in the winter every other time you perform a test.

Structural changes to the home

If you renovate your home, it should be retested for radon after your construction is complete. Structural changes, including minor adjustments, can disrupt the soil and let more radon in. Even more, small cracks created during the construction process can let radon in, so it’s important to test as a final step of the renovation process.  

No matter what kind of home you have, you should be testing for radon at least every two years and alternate your tests between summer and winter. Click here to get a free radon test sent to your home.