Radon Testing in Granville, OH

Radon Testing in Granville involves short-term (2-7 day) charcoal canister or continuous radon monitor placement on the lowest occupied level, working on the lowest lived-in level of the home where occupants spend more than 4 hours per day. The service is the first step for any home that has not been tested in the last 2 years, for any home being sold, and for any home after a significant foundation, basement, or HVAC modification.

Granville's historic village core, much of it built in the early 1800s around Denison University, sits on stone and rubble-masonry foundations where soil gas typically enters through the porous wall itself rather than a single crack. Licking County is in EPA radon Zone 1, and the newer subdivisions built at the edges of the village since the 1980s sit on poured basements or slabs where a conventional sub-slab suction point is the more straightforward fix. Granville sits in the valley of Raccoon Creek and the South Fork Licking River, and the village's historic district limits exterior alteration on much of the pre-1950 core. Granville sits on geology that drives elevated regional radon exposure across the Columbus metro, including Licking County.

Licking County testing spans a wide range of foundation ages within EPA radon Zone 1, from older poured basements in the county's established towns to newer subdivision construction built at village edges since the 1980s, so confirming which generation of foundation a given house has is part of setting up the test correctly.

ANSI/AARST MAH-2023 establishes the residential measurement protocol. Closed-house conditions must be maintained throughout short-term testing. The Ohio Department of Health Radon Licensing Program oversees radon program compliance for Granville, and Ohio licensure under ORC 3723.02 applies to any contractor performing mitigation work in the state.