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New Jersey Water Hardness
Across the 5 cities we track in New Jersey, hardness ranges from 4.7–10.2 GPG, with 2 cities running hard or very hard, and 2 more cities don't publish a figure.
5 cities tracked. View the New Jersey hardness map → · Is New Jersey water safe to drink? →
Cities with no published figure
These New Jersey cities don't publish a hardness number (it isn't a regulated parameter), so they can't be ranked — but we still track them. See each page for how to check your own tap.