Water quality · TX

Texas Water Quality (2026)

Up to 207 contaminants detected statewide. Over 700 water systems reported TTHM above the EPA legal limit of 80 ppb, reaching an estimated 8.6M people.

Our Texas coverage focuses on the 4 metros below: Austin, Dallas, Houston, San Antonio. 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 Texas 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 Texas are a different story and need a mail-in lab panel, the utility CCR will not apply.

Sources: EWG Tap Water Database; Clearly Filtered 2026