Georgetown Water Hardness & Quality Report (2026)

The City of Georgetown Utilities provides drinking water to over 75,000 residents in Williamson County, Texas. Water sources include surface water from Lake Georgetown on the North San Gabriel River and groundwater from the Edwards Aquifer via multiple wells. Treatment occurs at the Lake Georgetown Water Treatment Plant and several groundwater treatment plants, employing coagulation, sedimentation, filtration, and chlorine disinfection.

The supply originates in the North San Gabriel River watershed draining into Lake Georgetown, and the underlying Edwards Aquifer — a prolific karst system spanning Central Texas. The Cretaceous Edwards Formation, composed of porous limestone and dolomite deposited approximately 100–145 million years ago, defines local geology. Rainwater dissolving these highly soluble carbonates through extensive fracture networks and caverns over decades yields one of the most mineralized supplies in the region, producing a characteristically very hard water with no additional softening at the utility level.

Very hard water accelerates scale buildup in pipes, water heaters, dishwashers, and washing machines, potentially causing significant annual household damage from reduced efficiency and frequent repairs. Kettles and fixtures develop thick deposits, shortening appliance life by years. Regular descaling with vinegar, installing drain screens, and choosing scale-resistant appliances are recommended; a whole-home water softener is strongly advised. Recent reports note 9 contaminants exceeding health guidelines, including carcinogenic chromium-6, bromodichloromethane, and heavy metals; the utility fluoridates the supply and maintains EPA compliance, but point-of-use filters are advised for targeted contaminant removal.