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Montana Water Hardness
Across the 4 cities we track in Montana, hardness ranges from 3.1–10.22 GPG, with 3 cities running hard or very hard, and 1 more city doesn't publish a figure.
4 cities tracked. View the Montana hardness map → · Is Montana water safe to drink? →
Cities with no published figure
These Montana 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.