To address radon pollution, homeowners should test indoor air quality using EPA-approved kits, install mitigation systems like sub-slab depressurization fans if levels exceed 4 pCi/L, and seal cracks in floors and walls. Mitigation typically reduces radon concentrations by 80-99%.

Radon, a colorless, odorless radioactive gas, is the second leading cause of lung cancer in the United States, responsible for approximately 21,000 annual deaths, according to the Environmental Protection Agency (EPA). It originates from the decay of uranium in soil and enters homes through basements, crawl spaces, and cracks. The EPA recommends that all homes be tested, as 6.9 million U.S. homes have levels above the 4 pCi/L action threshold. Mitigation systems, such as active soil depressurization or membrane barriers, are proven effective: a 2021 study in Environmental Science & Technology found that these systems reduce radon levels by 90-99%. Sealing entry points (e.g., sills, pipes) is critical but insufficient alone, as radon can re-enter through new cracks. The EPA estimates that mitigation costs average $1,200-$2,500, but this is offset by reduced health risks. Regular testing and maintenance ensure long-term safety, aligning with the EPA’s mission to protect public health through evidence-based strategies.