Safe Radon Levels

There is no 'safe' radon level so the only way to lower your risk of developing lung cancer is to test for radon. Then take steps to reduce your level when necessary, following the EPA and CDC guidelines.

The Environmental Protection Agency (EPA) action level is 4.0 pCi/L, while the World Heatlh Organization (WHO) recommends mitigation at 2.7 pCi/L (100 Bq/m).  Countries outside of the United States may have different action levels. For example, Health Canada recommends mitigation at 200 Bq/m.

There is no EPA action level for radon in water, though the American Association of Radon Scientists and Technologists (AARST) recommends mitigation at 4,000 pCi/L in water. Some states also have recommended mitigating radon in water at the levels below. A good rule of thumb is that 10,000 pCi/L of radon in water can add about 1 pCi/L to the air.

Connecticut: 5,000 pCi/L
Maine: 4,000 pCi/L
Massachusetts: 10,000 pCi/L
New Hampshire: 2,000
New Jersey: 800 pCi/L
Rhode Island: 4,000 pCi/L
Vermont: 5,000 pCi/L
Wisconsin: 5,000 pCi/L

It's important for homeowners to test for radon every two years, even if you live in an area where radon isn't prevalent. Homeowners can test their homes with easy-to-use test kits. Professional radon testing services are also available for more accurate and comprehensive assessments of radon levels in a home.

The only way to determine the level of radon gas in any structure is to test. 1 in 6 homes in the United States has elevated radon levels. If your radon levels come back near or above the acceptable levels, seek a certified and insured Radon Professional who can provide mitigation options.

Mitigate! If radon levels in a home exceed the action level, its important to take measures to reduce your long-term exposure to elevated radon levels. Radon mitigation measures can include improving ventilation, sealing cracks and gaps in the foundation, and installing a radon mitigation system.