Holladay Water Hardness & Quality Report (2026)

Holladay, Utah, receives water services primarily from Holliday Water Company (also referenced as Holladay Water), which serves the city's residential and commercial areas in Salt Lake County. The utility sources water from a mix of surface water including Little Cottonwood Creek and Provo River diversions, supplemented by groundwater from local wells in the Cottonwood Heights vicinity. Treatment occurs at regional facilities managed in coordination with Salt Lake City Department of Public Utilities, involving filtration and disinfection. The service area covers approximately 8 square miles in the southeastern Salt Lake Valley foothills.

The watershed spans the central Wasatch Mountains, with headwaters in alpine zones feeding into canyons like Little Cottonwood. Key geological features include thrust faults exposing Mississippian and Pennsylvanian carbonate formations such as the Deseret Limestone and Oquirrh Group, which dominate the mineral profile. Shallow unconfined groundwater interacts with these limestone and dolomite rocks, enhancing mineralization through natural dissolution of calcium and magnesium carbonates. This limestone-rich geology shapes a characteristically hard supply prone to elevated mineral content.

At moderately hard levels, scale buildup occurs on fixtures, reducing efficiency in water heaters, dishwashers, and washing machines, while leaving spots on glassware and films on skin after bathing. Faucets and showerheads clog over time. Maintenance involves periodic vinegar descaling, installing sediment filters, and flushing heaters annually. A water softener is recommended to mitigate these effects and extend appliance life. Holladay water meets EPA standards for pH (typically 7.2–8.0) and is in compliance with lead and copper rules. Treatment includes coagulation, sedimentation, filtration, chloramination, and fluoridation, as detailed in Holliday Water Company's annual Consumer Confidence Reports.