Clemson Water Hardness & Quality Report (2026)

City of Clemson Utilities Department supplies its roughly 15,000 residents and students in Pickens County, South Carolina, with water drawn from two primary sources. The main supply originates from Hartwell Lake Reservoir on the Savannah River, a U.S. Army Corps of Engineers project. This is supplemented by water from Twelve-Mile Creek. Clemson purchases treated water from the Anderson Regional Joint Water System for its Hartwell Lake supply and from the Easley/Central Water District for its creek water, ensuring safe delivery through its distribution network with maintained chlorine residuals.

The watershed feeding these sources lies within the Piedmont region, characterized by ancient metamorphic and igneous rocks like gneiss and schist from the Paleozoic era. Unlike areas with limestone, this region lacks significant karst or carbonate features. Consequently, surface waters flowing through this granitic and metamorphic terrain pick up very few dissolved minerals, contributing to the exceptionally soft water quality. The underlying fractured bedrock aquifers also play a minimal role in mineral dissolution, further preserving the water's low mineralization.

Because the water is very soft, homeowners will notice minimal buildup in appliances like water heaters, dishwashers, and washing machines, which can help extend their lifespan and reduce maintenance. Pipes and fixtures are also less prone to mineral deposits. While soap and detergents will lather easily, extremely soft water could potentially cause minor corrosion in certain unlined metal pipes if the pH is on the lower side. However, installing a water softener is generally not advised, as it could potentially worsen such issues. Recent reports from ARJWS and the Town of Central confirm the water meets all federal and state safety standards, with no significant contaminant detections.