Water quality · MO

Missouri Water Quality (2026)

Mixed surface and limestone-aquifer sources; hardness is the main issue for most households.

Our Missouri coverage focuses on the 1 metros below: Kansas City. 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 Missouri 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 Missouri are a different story and need a mail-in lab panel, the utility CCR will not apply.

Sources: USGS