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Buyer's Guidechevron_rightGlossary

Radon

In plain English

An invisible, odorless radioactive gas that comes up from the soil and can build up inside a home. The EPA says it is the leading cause of lung cancer among non-smokers. Testing is separate from a standard inspection.

By David Knorr · Last reviewed October 28, 2026

Why it matters to you

The only way to know the level is to test. The EPA recommends fixing a home at 4 pCi/L or higher, usually with a fan and pipe system that vents it outside. Order the test at the start of due diligence so the result is back in time to negotiate.

routeStep 6: Due diligenceHome inspectionSewer scopeDue diligence period

infoGeneral information based on the standard Georgia REALTORS® purchase contract and public guidance. Your own contract decides: read it, and ask your agent or closing attorney about anything that matters. Not legal or financial advice.