Westwood Water Hardness & Quality Report (2026)

Westwood, New Jersey, gets its water from New Jersey American Water, which draws from the Hackensack River and reservoirs like Lake Tappan and Woodcliff Lake. Groundwater wells also contribute to the supply. Water is treated at facilities such as the Lake Tappan Water Treatment Plant before reaching the borough's residents. The water originates in the Hackensack River watershed, an area characterized by Triassic sedimentary rocks including the Stockton and Lockatong Formations. These formations, part of the Newark Basin, contain groundwater aquifers that pick up minerals from limestone layers, contributing to a hard water supply. Surface runoff also picks up minerals from eroded limestone, further increasing the water's hardness.

Homeowners often notice the effects of this hard water on their appliances and plumbing. Significant scale buildup can reduce water flow in pipes over time and clog heating elements and valves in water heaters, dishwashers, and washing machines. You might also see white deposits on kettles and faucets, and laundry might feel stiff. To combat these issues, homeowners can regularly descale with vinegar, install filters that inhibit scale, and flush their water heaters annually. For the best results in extending appliance life and improving cleaning, a water softener is highly recommended for households in Westwood.

While Westwood's water meets federal safety standards, New Jersey American Water reports that some contaminants, including potential PFAS, have been found above health guidelines. Filters are therefore advised for residents. The utility also confirms compliance with lead and copper regulations through corrosion control measures. Treatment processes include coagulation, sedimentation, filtration, and chlorination, with no fluoride added. The water's pH generally falls between 7 and 8.