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Hays County, TX

Water Testing in San Marcos, TX

Know what is in your water before you treat it.

Call (210) 726-6895

About the water in San Marcos

San Marcos is served by City of San Marcos Water Department, which draws from San Marcos Springs and Edwards Aquifer production wells. Local water tests in the range of 12 grains per gallon, based on the most recent utility averages.

San Marcos draws from San Marcos Springs, one of the largest spring systems in the Edwards Aquifer, at the border of Hays and Comal counties. Spring discharge water is among the softer outputs of the Edwards system, typically reading around 12 grains per gallon. While that is lower than the San Antonio metro average, it still falls well above the soft threshold. Texas State University students and residents moving from outside Texas are often unaware of local water hardness until they see the effects on coffee makers and faucets.

Common local water concerns

  • Hard water minerals (approximately 12 grains per gallon, San Marcos Springs source)
  • Total dissolved solids

Why Water Testing fits San Marcos

San Marcos water runs moderately hard, in the 12 grains per gallon range per City of San Marcos Water Department. A free in-home test confirms the specific reading at your tap and checks chlorine, pH, and total dissolved solids before any treatment is recommended.

  • Bench test for hardness, chlorine, pH, and total dissolved solids.
  • Report cross-referenced against the utility CCR.
  • Treatment recommendation only if the test shows it is needed.

Other services in San Marcos

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Posted by the True H2O Team. Service area pages reflect water-utility data published by each county's primary water provider.