High Point Water Hardness & Quality Report (2026)

High Point, North Carolina — the 'Furniture Capital of the World' — draws its municipal water supply from the City of High Point Water Resources Division, sourcing from High Point Lake on the Deep River (a Cape Fear River tributary) in Guilford and Randolph Counties, supplemented by Randleman Lake on the Deep River in Randolph County — operated in partnership with the Piedmont Triad Regional Water Authority (PTRWA). The Deep River watershed drains the central North Carolina Piedmont south of Greensboro. Water hardness measures 173.5 mg/L — classified as hard.

High Point's hard supply reflects the mixed Piedmont geology of the Deep River watershed. The Deep River crosses three distinct terranes: the Precambrian–Ordovician Randolph–Chatham Zone (Carolina Terrane metagranite and metavolcanic rocks — generally calcium-poor); the Triassic Dan River–Danville Basin (red-bed arkose and mudstone — containing carbonate cement and calcium-bearing igneous fragments); and the Pennsylvanian–Permian Deep River Coal Basin (carbonaceous shale, sandstone, and occasional limestone lenses). The Triassic and Pennsylvanian calcareous formations contribute significant dissolved calcium to Deep River runoff, producing hard finished water that is among the harder Piedmont supplies in North Carolina.

At 173.5 mg/L, High Point residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and in appliances within weeks — monthly descaling with citric acid solution is standard maintenance. Dishwashers produce better glassware results with rinse-aid, and water heaters benefit from annual inspection for element scale. High Point Water Resources Division and PTRWA consistently deliver water meeting all North Carolina DEQ and EPA Safe Drinking Water Act requirements.