Forney Water Hardness & Quality Report (2026)

Forney's water is supplied by the City of Forney Public Works Department through the Forney Lake Water Supply Corporation (WSC), which purchases treated water from the North Texas Municipal Water District (NTMWD). NTMWD treats the water at the Wylie Water Treatment Plant using surface water drawn from multiple reservoirs: Lake Lavon (Collin County), Lake Texoma (Grayson County), Lake Tawakoni (Hunt, Rains, and Van Zandt Counties), Jim Chapman Lake (Hopkins and Delta Counties), and the East Fork Raw Water Supply Project wetland in Kaufman County, Texas, serving the city of Forney and surrounding areas.

The reservoirs sit within the upper Trinity River basin, underlain by Cretaceous-period Trinity Group formations — the Woodbine, Trinity Sands, and Antlers formations — composed of limestone, sandstone, and dolomite. These karstic units naturally leach calcium and magnesium ions into the surface waters collected in the reservoirs, imparting a consistently hard mineral character. Seasonal runoff from agricultural and urban lands across North Texas further influences mineral content throughout the supply.

Very hard water promotes limescale buildup in pipes, water heaters, dishwashers, washing machines, and coffee makers, reducing efficiency and shortening appliance lifespan. Fixtures develop white deposits, and soaps lather poorly, leaving film on skin, hair, and laundry. Regular vinegar descaling, sediment pre-filters, and high-efficiency appliances help mitigate these effects. A water softener is strongly recommended. The 2023 Consumer Confidence Reports from Forney and Forney Lake WSC confirm EPA compliance; filtration is additionally recommended given reports of contaminants above health guidelines.