What Is Radon Mitigation?
The EPA recommends fixing a home if the radon level is 4 picocuries per liter or more, and because there is no known safe level of exposure to radon, recommends that people consider fixing homes with levels between 2 and 4 pCi/L.
The EPA says active subslab suction, also called subslab depressurization, is the most common and usually the most reliable radon reduction method. One or more suction pipes are inserted through the floor slab into the crushed rock or soil underneath, or below the slab from outside the home, and a radon vent fan connected to the pipes draws radon from below the home and releases it outdoors while creating a vacuum beneath the slab.
The EPA says some radon reduction systems can reduce radon levels by up to 99 percent, and that most homes can be fixed for about the same cost as other common home repairs, with costs depending on the home's size and design and the methods needed, so it suggests getting estimates from one or more qualified contractors. It advises contacting your state radon program for help finding qualified professionals, since states receiving EPA indoor radon grants must provide a list of credentialed radon service providers.
Sources checked September 15, 2026. Every point below links the page it came from.
The sources behind this answer
- Government sourceThe EPA recommends homes be fixed if the radon level is 4 pCi/L or more, and that people consider fixing homes with levels between 2 and 4 pCi/L because there is no known safe level of exposure. US EPA ↗
- Government sourceThe EPA says active subslab suction, also called subslab depressurization, is the most common and usually the most reliable radon reduction method, using suction pipes inserted through the floor slab. US EPA, Consumer's Guide to Radon Reduction ↗
- Government sourceThe EPA says a radon vent fan connected to the suction pipes draws radon from below the home and releases it outdoors while creating a vacuum beneath the slab. US EPA, Consumer's Guide to Radon Reduction ↗
- Government sourceThe EPA says some radon reduction systems can reduce radon levels by up to 99 percent. US EPA ↗
- Government sourceThe EPA says most homes can be fixed for about the same cost as other common home repairs, with costs varying by home size, design and methods needed. US EPA ↗
- Government sourceThe EPA advises contacting your state radon program to find qualified professionals, and requires states receiving indoor radon grants to list only credentialed radon service providers. US EPA ↗
Sources checked September 15, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.