Colleyville Water Hardness & Quality Report (2026)

The City of Colleyville Public Works Department provides drinking water to residents in Colleyville, Texas, located in Tarrant County within the Dallas-Fort Worth metroplex. The utility purchases finished surface water from the Trinity River Authority (TRA), with Lake Arlington serving as the primary source reservoir. This water undergoes conventional treatment at TRA facilities before distribution through Colleyville's system, serving approximately 25,000 residents across a 14-square-mile service area. For inquiries regarding taste or odor, Public Works can be reached at 817.503.1376.

Lake Arlington lies within the Trinity River watershed, spanning the Fort Worth Prairie ecoregion where Cretaceous limestone formations dominate the geology. These include the Edwards Plateau limestones and underlying Woodbine and Trinity Group sands, which contribute to the water's mineral profile through natural dissolution processes. The hard supply character stems from prolonged contact with carbonate-rich bedrock, imparting a mineralised quality typical of North Texas surface waters derived from limestone terrains.

Scale buildup is a primary concern, manifesting as limescale deposits in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Showers and fixtures may develop films, while soaps lather poorly, increasing usage. Regular descaling of appliances and vinegar rinses for fixtures are recommended; a water softener is widely advised to mitigate these effects and extend equipment life. The 2021 Consumer Confidence Report confirms compliance with federal health standards; third-party analyses note elevated disinfection byproducts including TTHMs at 215x their health guideline and haloacetic acids at 205x from chlorination. Surface water treatment includes coagulation, sedimentation, filtration, and disinfection.