Radon Mitigation Systems in Hilliard, OH

Radon Mitigation Systems in Hilliard involves sub-slab depressurization with an inline radon fan, sealed slab penetrations, and an exterior discharge stack above the eave line, working on the slab-to-soil interface and any below-grade openings where soil gas enters the home. The service is the standard installation for any Columbus home testing above the EPA action level of 4.0 pCi/L on a 90-day or annual long-term average.

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 installs run on Devonian limestone-and-shale bedrock under a glacial till cap, and the county's EPA Zone 1 designation applies evenly across both the aged, cracked slabs common in Columbus's older neighborhoods and the more uniform poured basements of newer suburbs like Dublin and Hilliard, so the install method tracks foundation type more than location within the county.

Mitigation systems installed in Ohio must meet ANSI/AARST CCAH-2020-0523 for existing dwellings and be installed by a contractor licensed under ORC 3723.02 (Ohio Department of Health Radon Licensing Program). 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.