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False Positive Radon Tests: 4 Things Listing Agents Should Be Aware Of

Radon is a radioactive gas that is said to be the leading underlining cause of lung cancer in the U.S.A. Radon is a gas that is naturally occurring that is formed from uranium breakdown with the water, rocks and soils around and below the structure. Typically, when purchasing as home a home inspection company will perform a radon test. Routine radon tests should be performed as the initial radon test performed by your local home inspector will only give you an idea of the radon levels at the time of the home inspection. Radon readings over 4.0 pCi/L are considered high, and a radon mitigation system will be recommended by your local home inspection company.

What happens if the radon results return at 4.1 pCi/L (.1 over)?

The home inspection company performing the home inspection will usually test over a 48-hour period. If a radon test returns slightly high results you may want to consider some external factors that are not typically present and request a retest of the radon levels. Various factors the seller and home inspection company should consider when performing radon testing: