Whole House Water Softeners in Caddo Mills

Caddo Mills buys all of its water, and from two different neighbors. The city's 2025 Water Quality Report lists two interconnects, both carrying treated surface water: the Greenville line, system TX1160004, metered at 2807 Highway 66, and the Cash Special Utility District line, system TX1160018, which enters close to the interstate. Greenville's water treatment page names Caddo Mills as one of three wholesale customers, with Jacobia Water Supply Corporation and Shady Grove SUD, and describes a plant expanded to 13 million gallons a day in 1993 and 1994 that draws most of the year on the city's off-channel reservoirs north of town and turns to Lake Tawakoni as a supplemental source in dry seasons; Greenville's 2024 report puts those reservoirs as numbers 4 and 5. Cash SUD's 2025 report describes its own plant on Lake Tawakoni, treating by sedimentation, filtration and disinfection, and a second supply bought from the North Texas Municipal Water District out of Lavon Lake, which it says serves southeast Caddo Mills, Quinlan and Union Valley areas south of the interstate. So the Cash connection may carry district water, Cash's own Tawakoni water, or both.

Those suppliers print very different numbers. Cash SUD's 2025 table shows its own plant's water at 66 ppm total hardness as calcium carbonate, with no range printed, 170 ppm total dissolved solids, 27.2 ppm sodium and 49 to 79 ppm alkalinity, while the district water in the same table ran 96.0 to 200 ppm hardness, 182 to 455 ppm dissolved solids and 41.9 to 88.0 ppm sodium. On the USGS scale Cash's own 66 ppm is at the low edge of moderately hard, about 3.9 grains per gallon by the district's 17.12 divisor, while the district's 200 ppm top is very hard, about 11.7 grains. Greenville's 2024 Consumer Confidence Report prints no hardness figure for its finished water, and neither the Greenville treatment page nor Cash's report says which supplier is flowing into Caddo Mills on a given day. The district itself calls its water moderately hard on account of what Lavon Lake dissolves; Greenville and Cash treat Sabine basin water, and Greenville adds chlorine and ammonia at an average of 3.0 parts per million for disinfection.

Nowhere in Caddo Mills' own report is a hardness figure printed; its results pages cover disinfectant residual, lead and copper, disinfection byproducts and nitrate, so we show no figure for the city. What a homeowner here can take from the suppliers' numbers is that the water at a Caddo Mills tap could be the softer Tawakoni water Cash makes, the much harder district water Cash resells, or Greenville's reservoir water for which no figure is printed, and that the mix can change with the season and with which interconnect the city is drawing on. That is a wider spread than a town on a single supplier faces. A softener in Caddo Mills is sized to the highest reading your own tap shows, and a free water test is the way to get that reading, in ppm and grains per gallon, for your street.

Sources: City of Caddo Mills: 2025 Water Quality Report · City of Greenville, Texas: Water Treatment Plant · City of Greenville, Texas: CY2024 Water Quality Report · Cash Special Utility District: 2025 Consumer Confidence Report · North Texas Municipal Water District: Water Quality