As tens of thousands of new homeowners pour into Texas from California, Colorado, and other states, many are discovering that the water coming out of their taps is far harder than what they left behind. In the September 14, 2026 episode of The Building Texas Show, host Justin McKenzie speaks with Jason Stevenson of Kinetico at the San Antonio Home and Garden Show about the hidden damage hard water is inflicting on homes across the region.
The numbers are staggering. San Antonio water tests between 10 and 32 grains hard, while parts of Helotes run 50 to 150 grains. For context, tankless water heater warranties are voided above 10 grains of hardness, meaning many homeowners unknowingly void their warranties the moment they install the unit. Stevenson is blunt about the consequences: "Without a water softener, your dishwasher lifespan is reduced by close to 70%," he says, explaining that the heating element captures calcified minerals from the aquifer's limestone. Shower fixtures, he notes, can wear out twice a year in the hardest zones.
Stevenson advises new buyers to check glass shower doors and stovetops within two to three weeks of moving in. "If you see that white residue either on the glass door or around that pot and pan, then you know you have some very hard water over there," he warns. The episode also covers how fluoride and chlorine are added by the San Antonio Water System to control pipe buildup, and what that means for tap water quality.
The discussion extends to solutions. Kinetico's dual resin tank plus carbon tank design, Stevenson argues, outlasts single-tank competitors because the twin tank system uses soft water to regenerate, routinely lasting more than 20 years. Warranties transfer to new homeowners by serial number, a rarity in the industry. On sustainability, Kinetico regenerates on roughly 11 gallons of water versus 62 to 92 gallons for competing systems, a point tied directly to Texas water scarcity and the surge of data center demand. Pricing ranges from $3,200 to $7,500, with 12 months interest-free financing and military and first responder discounts. Commercial customers, including hotels, schools, churches, and San Antonio fire stations, have reduced detergent use by more than half after installation.
For the flood of newcomers unfamiliar with South Texas water, the episode serves as a practical warning: the damage is often invisible until it is costly. More information about the show is available at The Building Texas Show.
