Rhawnhurst Water Hardness & Quality Report (2026)

Rhawnhurst, Pennsylvania, a neighborhood in the Northeast Philadelphia section of Philadelphia County, receives its municipal water from the Philadelphia Water Department (PWD), which operates three major surface water intakes on the Schuylkill River and Delaware River. Water is treated at the Queen Lane Water Treatment Plant, Belmont Water Treatment Plant, and Northeast Water Treatment Plant before distribution through Philadelphia's extensive urban and suburban distribution network. Rhawnhurst, in the far northeast corner of the city near the Pennypack Creek corridor, is served primarily through the Northeast plant system.

The hard 174.5 mg/L hardness reflects the mineral character of both river sources. The Schuylkill River drains the Pennsylvania Piedmont and South Mountain — crossing Triassic Brunswick Formation red beds, Paleozoic schists and gneisses, and carbonate-rich Cambrian-Ordovician limestone formations of the Great Valley — accumulating substantial calcium and magnesium bicarbonates. The Delaware River contributes similar hardness from New Jersey Highlands and Triassic basin drainage. Blending at treatment moderates seasonal fluctuations but maintains consistent hard water delivery.

At 174.5 mg/L, Rhawnhurst's water is hard, and mineral scaling affects appliances noticeably over time. Kettles, coffee machines, and dishwashers all require regular maintenance. The more pressing concern for Rhawnhurst residents is the elevated PFAS level of 8.9 ppt — among the higher readings in the Philadelphia area — reflecting decades of industrial and municipal discharge into the Schuylkill watershed. Residents are strongly advised to use a certified NSF/ANSI 58 reverse osmosis filter for drinking and cooking water, which addresses both PFAS and the mineral taste from elevated hardness simultaneously.