Whole House Water Softeners in Farmersville

Farmersville's 2024 water quality report states the city's supply plainly: purchased surface water from the North Texas Municipal Water District's Wylie treatment plant, drawn from Lavon Lake in Collin County and Lake Texoma in Grayson County. The Texoma half of that pairing has a history of its own. The district obtained its water rights permit for Lake Texoma in 1986 and began building a 72-inch Texoma pipeline in 1990, but zebra mussels found in the lake in 2009 cost the district 28 percent of its supply until a pipeline carrying Texoma water directly to the Wylie plant was completed in 2014. The district now describes Wylie as treating a blend of the two lakes and as the largest plant of its kind in Texas. Lavon's side of the system also includes the East Fork Reuse Project, in operation since 2008 and built around 1,840 acres of man-made wetlands.

Hardness comes from the lakes themselves. The district's water-quality guidance says its treated water is considered moderately hard, mostly because of the minerals in Lavon Lake, and that those minerals are harmless but leave lime scale on fixtures. Farmersville's own report reprints the Wylie plant's regulated results for 2024, from disinfection by-products through fluoride, nitrate and turbidity, but it does not include the secondary table where hardness, sodium and total dissolved solids would appear, so we have no figure for the city. The district's 2025 data sheet for the Wylie plant, posted online by the City of Terrell, another district customer, gives the supplier's own picture: total hardness between 96.0 and 200 ppm as calcium carbonate, calcium from 31.2 to 61.3 ppm, magnesium 6.27 to 9.44, sodium 41.9 to 88.0, total alkalinity 43.6 to 138 and total dissolved solids from 182 to 455 ppm. Those are plant figures, not Farmersville measurements. Using the district's own conversion of dividing by 17.12, the plant's figures run from about 5.6 to about 11.7 grains per gallon, moderately hard at the low end and very hard at the high end.

What reaches a Farmersville tap is Wylie water, so its mineral content follows the district's blend rather than anything the city does locally. The Lavon-to-Texoma ratio shifts with lake levels and demand, and so does the share of calcium and magnesium in the finished water; that is why the Wylie range is so wide and why the same house can see more scale in one season than another. The chlorine residual the city's report tracks in its lines is a disinfectant and has no bearing on hardness. Because the city prints no figure, the honest number for your address is the one measured at your kitchen sink: our free water test reads it on the day, and we size a softener to the top of what it shows rather than to a regional average.

Sources: City of Farmersville 2024 Annual Drinking Water Quality Report · North Texas Municipal Water District, History timeline · North Texas Municipal Water District, Water Quality page · North Texas Municipal Water District, Water Quality Reports page · NTMWD Wylie Water Treatment Plants, Water Quality Data for Year 2025, secondary constituents · City of Terrell, Water department page