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Fact Sheet


Reducing Radon Risk

The only way to know if a home has a high level of radon is to test for it. If you discover your home has an elevated radon level, a number of steps can be taken to reduce your risk.

First, stop smoking and discourage smoking in your home. Smokers exposed to radon have a much higher risk of developing lung cancer.

Radon Repairs

A variety of methods are used to reduce elevated levels of radon gas including reducing the rate at which radon enters the home, and/or forcing the radon out once it has entered.

Methods for reducing the rate at which radon enters the home include:

Blocking off or sealing its entry points (like dirt floors, cracks in concrete walls and floors, floor drains, sump pumps, joints and hollow-block walls);

Reversing the direction of the flow of radon entry pathways by pressurizing the home;

Ventilating the soil surrounding the home so radon is drawn away before it can enter the home.

Lowering high radon levels require technical knowledge and special skills. Choose a radon contractor who is listed in the EPA's Radon Contractor Proficiency (RCP) Program. EPA-listed contractors carry a special EPA RCP photo-identification card.

In most cases, elevated radon levels can be reduced to between 2 and 4 Pci/L, and sometimes even below 2 Pci/L.

Most homes with elevated radon levels can be fixed for about the same cost as other common home repairs — between $500 and $2,500.

Environmental Protection Agency

Contact the South Dakota Safety Council at
or phone 605-361-7785 or 1-800-952-5539.