Bloomsburg Water Hardness & Quality Report (2026)

Bloomsburg, Pennsylvania, in Columbia County — the Columbia County seat on the Susquehanna River adjacent to Berwick and Danville in central Pennsylvania — receives its municipal water from the Bloomsburg Water Division, drawing from the Susquehanna River or local reservoir (Columbia County) through the central Pennsylvania water treatment system.

The moderately hard 100 mg/L hardness and TDS of 164.5 mg/L reflect the central Pennsylvania Susquehanna River supply's moderate Devonian and Ordovician calcareous character — softer than the Philadelphia Schuylkill supply (198 mg/L) but consistent with the upper Susquehanna basin (Binghamton NY: 129.5 mg/L; Lock Haven PA: ~98 mg/L). The Susquehanna River at Columbia County drains the Allegheny Front and Appalachian Ridge-and-Valley — Devonian Catskill Formation (slightly calcareous sandstone), Ordovician Reedsville Shale (calcareous — primary hardness contributor), and Silurian Rose Hill Formation (slightly calcareous). The Ordovician calcareous shale produces the moderately hard central Pennsylvania supply.

At 100 mg/L, Bloomsburg's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 5.1 ppt warrants a certified drinking water filter — the Columbia County central Pennsylvania industrial corridor and the Susquehanna River PFAS background from the Pennsylvania manufacturing region contribute to Bloomsburg's readings.