Yes. Houses side by side can read very differently because foundation type, cracks, sumps, and how each house is heated and ventilated all vary. EPA and Ohio guidance both say to test every home.
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Central Ohio streets are often mixed. In Worthington or Upper Arlington, a 1950s ranch on a slab can sit beside a 1930s house with a full basement and a later addition over a crawl. In Hilliard and Dublin, neighbors built from the same plan can differ by a patched slab, a sump pit, or a finished lower level. The ground itself changes over short distances in glacial country, where sand and gravel pockets sit beside tight clay. ODH says its own county and ZIP maps are for education only and that testing is the only way to know. A kit costs $15 to $30, and Ohio homeowners can order one free. See how to use a test kit.