Lehi Water Hardness & Quality Report (2026)

Lehi City Water Department serves approximately 75,000 residents in Lehi, Utah County, along the Wasatch Front. The utility sources water from Utah Lake (surface water rights), multiple municipal groundwater wells tapping deep aquifers, and imported supplies from regional providers including the Jordan Valley Water Conservancy District. Primary treatment occurs at local facilities including wellhead treatment for groundwater and blending stations, with advanced filtration and disinfection applied throughout the distribution system to meet applicable standards.

The supply originates within the Provo River/Utah Lake watershed, part of the larger Great Basin hydrologic region. Groundwater is extracted from unconfined and confined aquifers beneath the valley floor, recharged by Wasatch Range snowmelt. Key geological features include Quaternary Lake Bonneville lacustrine sediments — clays, sands, and gravels laden with carbonates — overlying older Tertiary and Cretaceous formations such as the Nephi Tongue of the Price River Formation and limestones of the Oquirrh Group. Dissolution of calcium- and magnesium-bearing minerals during infiltration and aquifer transit imparts a very hard supply character; seasonal blending leads to variable but consistently mineral-rich water.

Very hard water accelerates scale buildup in water heaters, dishwashers, washing machines, and faucets, reducing efficiency and lifespan — annual household costs from repairs and energy loss can exceed $1,300. Plumbing pipes narrow over time, showers leave soap scum, and laundry feels stiff. Regular vinegar descaling of fixtures and annual heater flushes help; a whole-home water softener is strongly recommended. Thirteen contaminants have been detected with 9 exceeding health guidelines; treatment includes chlorination, corrosion control, and basic filtration at wells.