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(HealthDay News) -- Radon is an odorless but toxic gas that can seep into buildings, including ground-level homes.
The U.S. Environmental Protection Agency, noting that elevated radon levels are found in about 1 in 15 homes, says the gas can enter a structure:
Through cracks found in solid flooring.
Through construction joints.
Through cavities or cracks in the walls.
Through gaps that form in suspended flooring.
Through gaps around service pipes.
Through your water supply.