Radon Testing in Hilliard, OH

Radon Testing in Hilliard 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.

Hilliard's housing stock is mostly newer subdivision construction, and passive radon vent stacks are common, which often makes mitigation a fan-only retrofit rather than a full new system. The small historic core along Main Street has older, shallower foundations that predate any radon code and need a full assessment rather than an assumption based on the surrounding subdivisions. Franklin County's EPA Zone 1 designation applies across both the historic core and the newer subdivision ring. Hilliard sits on the flat glacial till plain west of the Scioto River, with the river's Griggs Reservoir pool a few miles east of the city. Hilliard sits on geology that drives elevated regional radon exposure across the Columbus metro, including Franklin County.

Franklin County testing applies across all of EPA Zone 1, but the aged, cracked slabs in Columbus's older neighborhoods are more likely to show an elevated short-term reading than the newer, more uniform poured basements in Dublin and Hilliard, which is why a retest after any slab or foundation repair is standard practice here.

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 Hilliard, and Ohio licensure under ORC 3723.02 applies to any contractor performing mitigation work in the state.