Radon is an odorless, colorless, tasteless radioactive gas formed by the disintegration of uranium and radium. Because radon is a gas, it can easily enter homes and other buildings. In outdoor air, radon is diluted and present at very low levels. Inside homes, radon may become trapped and build up to dangerous levels. The United States Environmental Protection Agency (EPA) recommends that all homes be tested for radon gas.

Frequently asked questions about Radon and Radon testing

Q: Does Minnesota have high radon levels?

A: In general, homes in the Midwest are much more likely to have high radon levels due to the fact that we build most of our homes with basements and Minnesota contains widespread low grade uranium and radium. About one out of three homes in Minnesota have radon levels above EPA guidelines.

Q: Are some homes less likely to have radon?

A: Studies show that a home’s tightness, foundation type and soil type have no predictable effect on radon levels. A home with a Heat Recover Ventilator or Energy Recovery Ventilator will have radon levels 20%-50% below comparable homes.

Q: How do you test for radon?

A: We use a continuous electronic monitor. The monitor needs to be placed in the lowest level of the home – preferably in a bedroom or finished area if present. The monitor must remain at the property for at least 48 hours.

Q: I just had a test performed. What does my test mean?

A: If the overall EPA average is at or above 4.0 pCi/l, the EPA recommends that steps should be taken to reduce the radon level to below 4.0 pCi/l. We recommend contacting a qualified radon mitigation specialist.

Q: I just had a test performed. What is the difference between the Overall Average and the EPA Average?

A: The overall average is measured from the time the machine was set until the time the machine was picked up. The EPA protocol average does not factor in the first 4 hours of the test.

Q: What if my house has high radon levels?

A: To mitigate most homes, a contractor will run a 3" vent pipe from below the basement floor to a point above the roof and install a small fan on the pipe in the attic. In most homes, the system will cost $1,100 to $1,600, will be installed in less than a day, and will be guaranteed to reduce radon to less than 4pCi/L.