Plattsburgh Water Hardness & Quality Report (2026)

The City of Plattsburgh Water Department serves the City of Plattsburgh and surrounding areas in Clinton County, New York. The utility operates three upland gravity surface water sources: Mead Reservoir, West Brook Reservoirs, and the Saranac River. Water is treated at the city's treatment facility and disinfected with chlorine, with fluoride added prior to distribution to comply with State and Federal regulations. The system serves residential and commercial customers across the Plattsburgh area, supplying treated water that meets all applicable drinking water standards.

Plattsburgh's water supply originates in the Adirondack Mountains watershed, a region characterized by Precambrian metamorphic bedrock with minimal carbonate geology. Unlike western New York's limestone-rich formations, the Adirondacks naturally produce soft water with low dissolved mineral content. The upland surface sources avoid the harder groundwater found in other parts of New York State, contributing to the supply's characteristically soft water chemistry with limited calcium and magnesium dissolution.

The soft water supply in Plattsburgh means minimal scale buildup in household plumbing and appliances, reducing maintenance demands on water heaters, dishwashers, and washing machines. Soap and detergents perform efficiently without the mineral interference common in harder water areas, and water softening is generally not necessary. According to the 2023 Annual Drinking Water Quality Report, the water meets all current Health Department requirements; routine testing covers total coliform, asbestos, fluoride, nitrate, lead, and copper, with all detected contaminants below State-allowed levels.