University of Texas Water Hardness & Quality Report (2026)

University of Texas (Austin), Texas — the University of Texas at Austin campus in central Austin, Travis County — a campus community of approximately 50,000+ students and faculty on the 'Forty Acres' and the larger UT Austin campus in central Austin, one of the largest university campuses in the United States — receives its municipal water supply from the Highland Lakes (Colorado River — Lake Travis and Lake Austin) via the Austin Water Utility, distributed to the UT Austin campus through the campus water distribution infrastructure. Water hardness measures 327 mg/L — classified as very hard.

UT Austin's very hard supply reflects the Colorado River's Edwards Plateau calcareous limestone watershed. The Colorado River above Lake Travis–Lake Austin drains: the Edwards Plateau (Cretaceous Edwards Limestone and Austin Chalk — the Texas Hill Country calcareous limestone platform of the Balcones Escarpment, among the most soluble calcareous formations in Texas); the Llano Uplift (Precambrian Llano Uplift calcareous marble and limestone exposures); and the Cretaceous Comanche Platform limestone of the Texas Hill Country. The Edwards Plateau's highly soluble Cretaceous calcareous limestone produces the very hard 327 mg/L in the Highland Lakes supply — concentrated by the semi-arid Texas Hill Country evaporation.

At 327 mg/L, UT Austin campus users face severe hard water challenges. Scale deposits form very rapidly on all laboratory equipment, fixtures, and appliances — weekly descaling is necessary. Austin Water Utility consistently delivers water meeting all Texas TCEQ and EPA Safe Drinking Water Act requirements.