Whole House Water Softeners in Prosper

Prosper's 2025 water quality report prints its mineral results in a single table with two rows for every constituent, one marked Wylie and one marked Leonard, because the town can receive North Texas Municipal Water District water treated at either plant. The report describes the treatment as sedimentation, filtration and disinfection, and the district's own description of its process fills that in: ferric sulfate to pull fine particles together, settling, ozone as the first disinfectant at what the district calls the largest fully ozonated plant in the state, dual-media filtration, then ammonia added to form chloramine for the long trip through the pipes. The two plants start from different water. Lavon Lake, on the East Fork of the Trinity in Collin County, covers 20,622 acres and holds 412,598 acre-feet at its conservation pool; Bois d'Arc Lake, on Bois d'Arc Creek in Fannin County, covers 16,526 acres and holds 367,609 acre-feet, and first reached full pool on April 30, 2024. The report adds that the district takes part in the state's Source Water Protection Program for Lavon Lake on a voluntary basis.

This page's 200 mg/L is the Wylie row's highest 2025 reading, where hardness ran 96.0 to 200 mg/L: moderately hard in the lightest month, very hard in the heaviest, or about 5.6 to 11.7 grains per gallon. The Leonard row peaked at 144 mg/L on a range of 96.0 to 144, about 8.4 grains at most. The rest of the table explains the gap: the Wylie row lists 31.2 to 61.3 ppm of calcium and 6.27 to 9.44 ppm of magnesium, with 182 to 455 ppm of dissolved solids, while the Leonard row lists 39.7 to 52.4 ppm of calcium, 2.69 ppm of magnesium and 194 to 253 ppm of dissolved solids. Sodium came in at 41.9 to 88.0 ppm on the Wylie row and 21.7 to 34.6 on the Leonard row, and total alkalinity 43.6 to 138 against 83.6 to 133. The district describes the result as moderately hard water, owing to the minerals in Lavon Lake, and its conversion for homeowners is 17.12 mg/L to the grain.

Prosper built its growth on purchased water, and the report shows a tight system: the town's 2025 water loss audit found 4.3 percent unaccounted-for water, 7.7 percent under its goal, and the state recognizes Prosper as a Superior Public Water System. The federal SDWIS facility list for system TX0430009 shows what moves that purchased water: a Custer Road site with 5.000 and 3.000 million gallon ground tanks and six service pumps rated from 3,000 to 4,750 gallons per minute, and elevated tanks of 2.000 million gallons on South Craig Road, 2.0 million on East Prosper Trail and 2.5 million on Fishtrap Road. The same list keeps the town's well era as history: seven well records, on Prestonview Drive, East First Street and two county roads, one plugged and the rest inactive. The report adds that the town filed its lead service line inventory before the October 16, 2024 deadline and found 0 lead lines. For a homeowner the consequence is simple. There is no well water in the mix to soften things, so hardness at the tap is the district's hardness, moving with the lake blend and the season rather than with the street. The 200 figure is the top of the Wylie range, not an average, and it is the number to size against: a softener rated for about 12 grains per gallon handles any month the table recorded, with a metered valve regenerating less when the water runs nearer 96. The free water test gives the day's figure at your own faucet.

Sources: Town of Prosper, 2025 Consumer Confidence Report · City of Allen, 2026 Water Quality Report · North Texas Municipal Water District, Drinking Water Treatment Process · Texas Water Development Board, Lavon Lake · Texas Water Development Board, Bois d'Arc Lake · North Texas Municipal Water District, Water Quality · EPA SDWIS water system record record for TX0430009, Town of Prosper: population served, system type · EPA SDWIS water system facility records records for TX0430009