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South Dakota Water Hardness
Across the 2 cities we track in South Dakota, hardness ranges from 13.4–14.6 GPG, with 2 cities running hard or very hard, and 1 more city doesn't publish a figure.
2 cities tracked. View the South Dakota hardness map → · Is South Dakota water safe to drink? →
Cities with no published figure
These South Dakota 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.