Asheville Water Hardness & Quality Report (2026)

The City of Asheville Water Department serves approximately 130,000 residents across Buncombe County, including the city of Asheville and surrounding areas. The utility draws supply from two surface water reservoirs: North Fork Reservoir in Black Mountain and Bee Tree Reservoir in Swannanoa, both owned and protected by the city. Water is collected from mountain springs and streams feeding these lakes, then treated at the North Fork Water Treatment Plant and Bee Tree Water Treatment Plant before distribution through an extensive network of pipes.

The reservoirs lie within the protected Blue Ridge escarpment of the French Broad River watershed, encompassing steep forested slopes over Precambrian metamorphic bedrock including gneiss and schist. No major aquifers are involved, as the supply relies on direct surface runoff from granitic and low-carbonate geology. This crystalline mountain terrain imparts a very soft character to the water, with low dissolved minerals due to limited interaction with lime-rich sediments, yielding clear but potentially corrosive flow typical of upland southeastern reservoirs.

As very soft water, Asheville's supply minimizes scale buildup in pipes, water heaters, dishwashers, and washing machines. However, the low mineral content can accelerate pipe corrosion, potentially leading to leaks over time. Routine flushing of hot water systems and pH monitoring are advised; a softener is not recommended and could overly strip essential trace minerals. Bromodichloromethane has been detected above health guidelines per third-party analyses, likely from disinfection byproducts. Treatment at both plants involves coagulation, sedimentation, filtration, and chlorination, with ongoing monitoring for PFAS and organics.