Cortland Water Hardness & Quality Report (2026)

The Town of Cortlandville Water Department serves Cortlandville in Cortland County, New York, drawing its supply exclusively from the Otter Creek Aquifer, a groundwater source. Water is treated at department-managed facilities and distributed throughout the town's water and sewer district. The nearby City of Cortland operates its own municipal system; Cortlandville maintains a separate operation focused on local groundwater extraction. Treatment includes disinfection and basic conditioning to meet all state and federal standards, with no source restrictions or violations reported.

The Otter Creek Aquifer lies within the broader Finger Lakes watershed region, underlain by glacial deposits over Devonian bedrock including shales, sandstones, and minor carbonates from the Catskill and Hamilton Groups. The aquifer's contact with limestone and dolomite fragments in the glacial deposits dissolves calcium and magnesium ions. Local Silurian-Devonian carbonate lenses further enhance mineral leaching, imparting elevated dissolved solids and a hard character at 211 mg/L typical of northern Appalachian glacial aquifers.

Very hard water at 211 mg/L promotes scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Boilers and faucets clog from deposits; reduced soap lathering increases detergent use. Regular maintenance with vinegar descaling and scale inhibitors is advised; a water softener is strongly recommended to protect household systems. Testing shows pH of 7.4, within normal range. Lead compliance is met with no samples exceeding the 15 µg/L action level; City of Cortland reports 90th percentile at 1.2 µg/L and highs up to 9.4 µg/L in prior sampling. No PFAS data is noted in available reports.