Whole House Water Softeners in Fort Worth

Fort Worth treats its own water at five plants. The city's planning documents rate North Holly and South Holly at 80 million gallons a day each, Rolling Hills at 200, Eagle Mountain at 108 and Westside at 12. All of it starts as reservoir water. The 2025 water quality report maps six lakes with their volumes: Lake Bridgeport at 366,236 acre-feet, Eagle Mountain Lake at 179,880, Lake Worth at 33,495, Benbrook Lake at 88,250, Cedar Creek Reservoir at 644,785 and Richland-Chambers Reservoir at 1,103,816, with the Clear Fork of the Trinity River as the seventh source. The two East Texas reservoirs arrive through Tarrant Regional Water District pump stations that can deliver their water into Lake Benbrook, and from Benbrook the blend is pumped to Rolling Hills, the Holly plants or Westside; a second tie lets Benbrook water reach Eagle Mountain Lake, where the Eagle Mountain plant draws. The plants span a century of treatment. The Holly plant began running in 1912 on the Clear Fork and was renamed North Holly after a 1948 expansion, South Holly was completed in 1958, Rolling Hills opened in 1972 in south Fort Worth, Eagle Mountain was the first Texas plant to rely on ozone as its main disinfectant, and Westside, built in 2012, was the first in the system to filter through membranes. The federal facility inventory for the system lists six raw-water intakes on those lakes, two of them on Lake Worth, feeding 46 storage tanks and 121 pumps. The city's pumping appendix shows how unevenly the plants are sized: Rolling Hills' high-service pumps total 259 million gallons a day, Eagle Mountain's 144.8 plus 72, North Holly's 138, South Holly's 135 and Westside's 32.2. On the raw side, the district's contracts allow 182.87 MGD from Richland-Chambers, 153.88 from Cedar Creek and 142.37 from the West Fork lakes.

Reservoir water in this part of Texas carries calcium and magnesium dissolved from the carbonate rock its watersheds drain, and the city's report prints the result in its secondary constituents table. Total hardness as calcium carbonate ran 108 to 150 ppm in 2025, which the report itself converts to a span of 6 to 9 grains for each gallon. The pieces behind that figure sit in the same table: calcium from 37.6 up to 48.1 ppm, magnesium from 3.45 up to 7.35 ppm, bicarbonate from 99.7 up to 120 ppm, total alkalinity from 99.7 up to 124 ppm and total dissolved solids from 182 up to 244 ppm. Sodium is modest, 19.5 up to 27.9 ppm, the signature of lake water rather than deep well water. On the USGS scale 108 ppm is moderately hard and 150 ppm is hard, so the city's range crosses from one class into the next. The report gives the range for the system as a whole and does not break it out by plant, so no plant can be named as the source of the 108 or the 150.

Fort Worth moves finished water through ten pressure planes, twenty-one pump stations and 4,104 miles of pipe, averaging 216 million gallons a day in 2025, and which plant's water reaches a given street depends on where that street sits in the network. A house near the Eagle Mountain plant and a house in south Fort Worth near Rolling Hills can be drinking water from different lakes on the same morning, and the blend at any one plant shifts with lake levels and season. That is why the report prints a range rather than one number, and why a Fort Worth homeowner should treat 150 as the working figure. For a softener, size to that top end, roughly 8.8 grains, so the unit has headroom in the months the blend runs hard; the free water test shows where your own tap sits inside the range today.

Sources: City of Fort Worth, 2025 Water Quality Report · City of Fort Worth, Water Impact Fee Update · Fort Worth Water: History page · USGS Water Science School: Hardness of Water · EPA SDWIS via Envirofacts REST, water system facility records records for PWS TX2200012 · City of Fort Worth, Water Impact Fee Update, Appendix A: Existing Water Pumping Capacities