what is a radon designated zone?
Those counties with the highest potential are designated as Zone 1; those with the lowest comprise Zone 3. Zone 1 areas have predicted average radon levels at or above the EPA's 4.0 pico-Curies per liter (pCi/L) action level. (pCi/L is a measure of the amount of radioactivity in a known quantity of air.) If you are building in a Zone 1 county, you should include a radon control system in your new home. It is an inexpensive addition to the total cost of your house and is an easy way to protect you and your family. To determine which radon zone your new house will be built, please contact your state radon office. Top of page