Whitehall Township Water Hardness & Quality Report (2026)

Whitehall Township Authority provides drinking water to residents of Whitehall Township in Lehigh County, Pennsylvania, serving approximately 25,000 customers across a 12-square-mile area northwest of Allentown. The utility draws from multiple groundwater wells tapping local aquifers, with primary sources including the Allentown and Whitehall well fields. Water is treated at the Hensingersville Treatment Plant and several booster stations, employing filtration, disinfection with chlorine, and corrosion control. No surface water reservoirs or rivers are used; the supply is entirely from bedrock groundwater.

The water originates within the Lehigh River watershed, specifically the upper Lehigh Valley subbasin, underlain by folded and faulted Paleozoic sedimentary rocks of the Appalachian Basin. Key formations include Devonian sandstones and shales with interbedded limestones — including the Catskill and Hamilton Group — forming confined aquifers that yield moderately mineralized water through natural dissolution of carbonate rocks. Karst-influenced valleys enhance mineral leaching from ancient marine deposits.

As moderately hard water, Whitehall's supply causes moderate scale buildup in appliances like dishwashers, washing machines, and water heaters, reducing efficiency and increasing energy costs. Soap lathering is somewhat reduced, and spotting may occur on glassware. Annual descaling of fixtures and heaters is advised; a water softener is optional but recommended for households noticing these effects. pH typically ranges 7.2–7.8; the utility meets lead and copper action levels through corrosion inhibitors, and PFAS levels are reported below EPA limits, though TTHMs and hexavalent chromium are flagged above health guidelines by third-party sources while remaining within legal MCLs.