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NC State Extension

Reducing (Mitigating) Radon Levels in a Home

The good news about radon in a home is that it can be fixed, and that too rather easily, and without spending several thousand dollars. Once a home has been tested for radon levels, and these are found to be above the EPA recommended limits of 4 pCi/ L, the next thing is to fix the flow of radon inside the home. The levels will  drop as soon as the mitigation system is installed. Cost of any such system depends on several aspects of a  home- its size, design, foundation type, construction materials used, and local climate (National Radon Program Services, n.d.). Average cost of a system ranges from $800-$1500 (ibid)EPA has published an excellent document (photo below) to guide property owners regarding how they can go about reducing radon levels in their homes. The document can be accessed here. It basically provides guidance on three important aspects related to radon reduction:

  • Selecting a qualified radon mitigation contractor to do the radon reduction work.
  • Determining the appropriate radon reduction method(s).
  • Maintaining the new radon mitigation system after it has been installed.

EPA guide

To ensure that the right mitigation system gets installed, and in a correct manner, it is essential that “qualified” contractor or services are used for the radon fixing or mitigation services. For additional guidance on finding the qualified contractor, please check the page “How to find a qualified contractor……” The mitigation work should also follow the guidelines or standards established under the state radon programs. The national level standards are (National Radon Program Services, n.d.):

Lastly, an important thing to remember is that any home where mitigation steps have been taken must be retested for radon levels to ensure that the mitigation system installed is effective.This retesting should be done at least 24 hours after the mitigation steps have been implemented. It is also recommended that a home gets retested for radon levels every few years or so.


National Radon Program Services. Reducing Radon in Your Home. Retrieved January 26, 2015, from