Frisco water meets top safety standards, but system loses 678 million gallons
Frisco’s 2025 water report shows no safety violations, but the city still lost more than 678 million gallons, mostly through leaks and accounting losses.
Frisco's drinking water cleared every state and federal safety standard in its 2025 report, but the system still lost more than 678 million gallons across the city. The annual report, published in June 2026, gave Frisco the Texas Commission on Environmental Quality's Superior rating.
The report found no violations in the tested contaminant categories, including microbial organisms, inorganic chemicals, organic chemicals, radioactive materials and disinfection byproducts. Neither Cryptosporidium nor giardia was detected in the sampled water, and lead and copper levels remained well below action thresholds. The water coming out of the tap met the strongest available public health standards in the testing Frisco reported for calendar year 2025.
Frisco buys treated water from the North Texas Municipal Water District's Wylie Water Treatment Plant, which NTMWD calls the largest water treatment facility of its kind in Texas. The plant treats a blend of water from Lavon Lake and Lake Texoma, then sends it into a regional system that serves communities across North Texas. Its temporary disinfectant switch lasts about one month each spring, and crews flush hydrants during that period to help move disinfected water through the pipes and maintain quality year-round. Residents may notice a short-lived change in taste or smell even when the water remains safe.
Frisco's 2025 water loss audit showed more than 678 million gallons lost systemwide, including about 325 million gallons in apparent losses and about 353 million gallons in real losses from leaks. The city's reports page posts archived monthly water reports, lead and copper service line inventory information, average daily water use data and daily Lake Lavon water level reports.
Frisco's 2025 population was roughly 242,000 to 245,470, while NTMWD serves more than 2.2 million people in up to 80 communities across 10 counties and expects that service area to more than double by 2050.
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