In Texas, mains water is delivered by local public water systems, regulated by the Texas Commission on Environmental Quality (TCEQ) under the US EPA Safe Drinking Water Act. Typical hardness: Mostly hard to very hard (limestone aquifers; central and west Texas especially). For a specific ZIP, see the EWG Tap Water Database.
Supplier
Local public water systems
Regulator
Texas Commission on Environmental Quality (TCEQ) · US EPA (Safe Drinking Water Act)
Hardness
Mostly hard to very hard (limestone aquifers; central and west Texas especially)