Victorville Water Hardness & Quality Report (2026)

City of Victorville Water Department serves approximately 130,000 residents in Victorville and surrounding areas of the Victor Valley, San Bernardino County, California. The primary water source is groundwater from 36 wells tapping the Alto Subarea of the Upper Mojave River Basin, providing over seven billion gallons annually. Supplemental supply comes from the Mojave Water Agency, also drawing from the same Alto Subarea wells. Water is treated at local facilities including treatment plants, reservoirs, pumps, and an extensive pipeline network before distribution.

The Upper Mojave River Basin sits in the Mojave Desert, where surface flows are ephemeral and recharge the Alto Subarea aquifer through infiltration. The geology features alluvial aquifers composed of unconsolidated Quaternary-age sands, gravels, and silts overlying basement rocks, with recharge influenced by precipitation in the San Bernardino Mountains. Surrounding formations include limestone and dolomite-bearing carbonate rocks that dissolve to impart calcium and magnesium minerals, yielding elevated mineral content from prolonged groundwater contact with these lithologies and producing the area's characteristically hard supply.

Scale buildup is common in pipes, water heaters, and fixtures, reducing efficiency and lifespan — hot water heaters may fail prematurely and appliances like dishwashers suffer from spotting. Boilers, faucets, and laundry equipment are most affected. Regular vinegar descaling, installing scale inhibitors, and flushing systems are recommended; a water softener is highly recommended to mitigate these effects and extend appliance life. The 2019 Consumer Confidence Report indicates hardness around 38–86 mg/L as CaCO3, with calcium at 12.7 ppm and an aggressive index of 11.21 suggesting mild corrosivity; no lead or copper violations were noted, though third-party tests flag arsenic from natural soil sources. The supply is noted for good taste from the basin.