Water quality · MN

Minnesota Water Quality (2026)

Surface and groundwater are typically very hard; Mississippi-fed utilities also test for nitrate.

Our Minnesota coverage focuses on the 1 metros below: Minneapolis. Each city page lists the utility's water source, hardness in grains per gallon, any contaminants flagged above EWG's stricter health guideline, and the whole-house system type that matches that specific profile, not a generic recommendation copied across the state.

If your Minnesota city is not in the list yet, the nearest covered metro is usually a reasonable proxy: regional source water and treatment plants are typically shared across nearby municipalities. Private wells in Minnesota are a different story and need a mail-in lab panel, the utility CCR will not apply.

Sources: USGS; EWG