New Milford Water Hardness & Quality Report (2026)

The New Milford Water Utility, operated by Suez Water New Jersey, serves around 16,000 residents in northern Bergen County, NJ. The primary source is surface water from the Hackensack River via the Hackensack Meadowlands, supplemented by allocations from the Woodcliff Lake and Lake Tappan Reservoirs managed by the Hackensack Water Company. Treatment occurs at the nearby Hillview Avenue Treatment Plant and other regional facilities, employing filtration, chlorination, and corrosion control before distribution through a network covering New Milford Borough and adjacent communities.

The Hackensack River Watershed spans 168 square miles across the Watchung Mountains and Piedmont, draining Triassic sedimentary rocks including the Passaic, Lockatong, and Stockton Formations—red shales, sandstones, and conglomerates from the Mesozoic era. These dissolve readily into groundwater and surface supplies, imparting a hard character rich in calcium and magnesium. Lockatong and Brunswick Formation rocks contribute to the water's hardness, while limestone outcrops in tributaries enhance mineralization.

When appliances like dishwashers and washing machines are used with very mineralized water, scale buildup is pronounced, reducing efficiency by up to 50% and shortening appliance life. To mitigate these issues, regular vinegar descaling, installing scale-inhibiting filters, and flushing hot water heaters annually are recommended. A whole-house water softener is also strongly recommended for households to prevent spotting on glassware, dry skin and hair, and soap inefficiency. Suez's annual Consumer Confidence Reports confirm compliance with EPA standards for pH, lead, and copper, providing some reassurance for residents.