Erie Water Hardness & Quality Report (2026)

The ERIE TOWN OF utility serves approximately 32,829 residents across Erie, Colorado, in Weld County. Water originates from surface water sources within the South Platte River watershed, treated via conventional filtration and disinfection with hypochlorite at facilities managed from 645 Holbrook Street, Erie, CO 80516. Contact the utility at 303-926-2895 or emergencies at 303-926-2701. Water quality reports are available at erieco.gov.

Erie's supply is drawn from the South Platte River watershed in the Front Range, where snowmelt from the Rocky Mountains flows through diverse geology including Cretaceous shales and Tertiary conglomerates — notably the Pierre Shale and Arapahoe Formation. These formations release alkaline earth metals from limestone and dolomite outcrops in the foothills, resulting in moderately mineralised water. Primary sourcing is surface-based, with water chemistry shaped by upstream erosion of mineral-rich terrains rather than deep groundwater dissolution.

At moderately hard levels, Erie water causes moderate scale buildup in dishwashers, washing machines, and water heaters, reducing efficiency over time. Soap lathering is fair but may require more detergent, and spotting occurs on glassware. Periodic vinegar descaling of fixtures and coffee makers is recommended; a water softener is optional but beneficial for households preferring to minimise deposits. Treatment involves conventional filtration and chlorination; the 2023 CCR confirms standards met, though 2 contaminants exceed EPA health guidelines. Minor concerns include possible selenium and chlorinated solvents; residents should flush taps to minimise lead risk per CCR guidance.