The potential for elevated radon levels for the state of Connecticut is well documented. The following map was generated using radon data from thousands of tests across the state. A detailed explanation of how the data was obtained and how the map was generated is available from the state radon website.

It is important to note that radon gas may be found in all areas of the state. There are no areas with a radon potential of None. This map should not be used as a substitute for radon testing. The only way to know for sure if you have elevated levels of radon gas is to perform a radon test. Radon tests are relatively inexpensive, carried by many home stores, and readily available over the internet.