Murrysville Water Hardness & Quality Report (2026)

Murrysville, Pennsylvania, in Westmoreland County — an affluent Westmoreland County municipality east of Pittsburgh in the Pittsburgh eastern suburbs, adjacent to Export and Export Borough in the eastern Allegheny County-Westmoreland County corridor — receives its municipal water from Pennsylvania American Water (PAWC), which draws from Beaver Run Reservoir (on Beaver Run Creek, a Loyalhanna Creek tributary) in western Westmoreland County as the primary water supply for the Murrysville-Monroeville corridor.

The moderately hard 159.5 mg/L hardness and TDS of 350.6 mg/L reflect the Loyalhanna Creek watershed's Appalachian Plateau geology. The Loyalhanna Creek drains the Chestnut Ridge and Laurel Ridge ridges of the Appalachian Plateau — terrain underlain by the Pennsylvanian Conemaugh Group (calcareous shale and limestone lenses, the Ames Limestone — a marine carbonate tongue in the Pennsylvanian sequence), the Allegheny Group (coal measures with limestone and shale), and the Pottsville Formation (conglomerate and sandstone). The Pennsylvanian marine carbonate horizons in the Pittsburgh-Westmoreland County area consistently produce moderately hard water in the Allegheny-Monongahela-Loyalhanna watershed system.

At 159.5 mg/L, Murrysville'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 8.4 ppt warrants a certified drinking water filter — the Pittsburgh defense and industrial manufacturing corridor, Arnold Engineering / Pittsburgh Army Arsenal legacy industrial sites, and the broader western Pennsylvania steel-chemical industrial PFAS complex contribute to Murrysville's elevated readings.