<p>In New Jersey, mains water is delivered by local public water systems, regulated by the New Jersey Dept of Environmental Protection (NJDEP), Division of Water Supply & Geoscience under the US EPA Safe Drinking Water Act. Typical hardness: Moderately hard to hard; varies by source. For a specific ZIP, see the EWG Tap Water Database.</p>
Sources: New Jersey Dept of Environmental Protection (NJDEP), Division of Water Supply & Geoscience, EWG Tap Water Database