South Burlington Water Hardness & Quality Report (2026)

The South Burlington Water Department serves approximately 18,000 residents in South Burlington, Chittenden County, Vermont. Water is sourced primarily from Lake Champlain via the city's intake in the lake, supplemented by groundwater wells during peak demand. Treatment occurs at the South Burlington Water Treatment Plant, which processes surface water through coagulation, sedimentation, dual-media filtration, disinfection, and fluoridation. The utility maintains a distribution system covering South Burlington and adjacent areas, fully adhering to EPA and Vermont DEC standards for safe drinking water delivery.

The Lake Champlain watershed spans 8,234 square miles across New York, Vermont, and Quebec, with South Burlington's intake in the southern basin near the mouths of the Winooski and LaPlatte Rivers. Underlying geology features the Middle Ordovician Chazy Limestone and Lower Cambrian Parker Slate with dolomitic horizons, part of the Champlain Valley's carbonate platform overlain by glacial till and Champlain Sea clays. These carbonate formations dissolve to contribute calcium and magnesium, yielding a moderately mineralised supply, with local groundwater from glacial drift aquifers over limestone bedrock adding similar chemistry.

At moderately soft levels, scale buildup appears on faucets, showerheads, and inside water heaters, reducing efficiency and lifespan — dishwashers, washing machines, and coffee makers are most affected, with spots on glassware and reduced soap lather. Annual vinegar descaling helps, but a water softener is often recommended for households experiencing dry skin or laundry stiffness. Water quality meets federal standards; pH is typically 7.2–7.8, fluoride is added at 0.7 ppm per Vermont Health Department guidelines, and no recent PFAS exceedances have been reported.