Huntley Water Hardness & Quality Report (2026)

Huntley Community Water Supply (also known as Huntley Water Company and Huntley Municipal Water Company), located at 10987 Main Street, Huntley, IL 60142 (phone 847-515-5200), provides drinking water to approximately 25,001 residents in the village of Huntley and surrounding areas in McHenry County. Water originates exclusively from groundwater wells with no surface water sources. Treatment involves clarification and chlorination, and the Illinois EPA has assessed the supply as not vulnerable to contamination based on well monitoring, hydrogeologic data, and distribution system checks.

The groundwater supply in Huntley is shaped by the Upper Fox River basin, where precipitation recharges aquifers through glacial deposits. Key geological features include Pleistocene glacial drift overlying Silurian-age dolomite and limestone formations that dissolve to impart minerals into the water, creating a hard supply. These Paleozoic bedrock layers, prevalent in northern Illinois, release calcium and magnesium as water moves through fractures and porous sands, producing an overall mineralized character without significant softening from surface water influences.

Very hard water in Huntley creates significant scale buildup, forming white deposits on fixtures, inside pipes, and heating elements. Appliances most affected include water heaters, dishwashers, washing machines, and coffee makers, experiencing reduced efficiency and frequent repairs. Regular cleaning of aerators and showerheads and descaling with vinegar solutions help; a water softener is highly recommended to extend appliance life, improve soap efficiency, and prevent spotting on dishes and skin dryness. The Illinois EPA confirms non-susceptibility to viral pathogens; trace organic compounds including 1,2,4-Trichlorobenzene and Isopropylbenzene are noted in assessments but managed within safe levels, with no PFAS violations reported.