Radon can enter homes or buildings through various pathways. The primary route is through the soil surrounding the foundation. As radon is naturally produced by the decay of uranium in the soil, it can seep into structures through cracks or gaps in the foundation walls, floors, and joints. Other potential entry points include gaps around pipes, drains, and sump pumps, as well as construction joints and crawl spaces. Radon can also dissolve into well water and be released as a gas when water is used for activities like showering or washing dishes. Once inside, radon can accumulate to hazardous levels, particularly in enclosed or poorly ventilated areas. Regular testing is important to identify and address any radon issues promptly to ensure a safe and healthy indoor environment.