<p>In North Carolina, mains water is delivered by local public water systems, regulated by the NC Dept of Environmental Quality (DEQ), Division of Water Resources, Public Water Supply Section under the US EPA Safe Drinking Water Act. Typical hardness: Generally soft; Piedmont and coastal surface supplies run soft, edging to moderately hard in some mountain / inland groundwater. For a specific ZIP, see the EWG Tap Water Database.</p>
Sources: NC Dept of Environmental Quality (DEQ), Division of Water Resources, Public Water Supply Section, EWG Tap Water Database