North Arlington Water Hardness & Quality Report (2026)

The North Arlington Water Department provides drinking water to about 16,000 residents in North Arlington, New Jersey. The utility draws water mainly from the Passaic River through the Newark Bay intake, with additional supply from wells tapping the Newark Basin aquifer. Treatment occurs at the Wanaque-Morris Aqueduct connection and North Arlington filtration facilities before distribution. The Passaic River Basin, a 1,000-square-mile area, serves as the primary watershed.

The region's geology is characterized by the Triassic Newark Supergroup, featuring Stockton and Lockatong Formations composed of sandstones, shales, and mudstones. These rocks release alkaline earth metals as they dissolve, contributing to the water's mineral content. Groundwater from the Potomac-Raritan-Magothy aquifer also adds dissolved minerals. This geological makeup results in naturally leached silicates and carbonates, creating a moderately mineralized water supply, influenced by surface water and urban runoff.

Homeowners in North Arlington may notice moderate scale buildup in appliances like water heaters and dishwashers, which can reduce efficiency and increase energy costs. Laundry might feel stiffer, and soap scum can form on bathroom fixtures. Monthly descaling with vinegar for faucets and heaters is a good practice, as is using high-efficiency detergents. For those prioritizing water quality for bathing and laundry, or if scale issues are a concern, a water softener is often recommended. The water's pH is typically between 7.5 and 8.0, which helps control corrosion, and the North Arlington Water Department monitors for lead and copper, with levels generally below action limits.