Roselle Park Water Hardness & Quality Report (2026)

The Roselle Park Water Department provides water to the Borough of Roselle Park, a community of about 14,000 residents in Union County, New Jersey. Their water supply comes from a combination of surface water sources within the Passaic River watershed, including reservoirs like Pequannock and Wanaque, and some groundwater wells. Water is treated at regional facilities, such as those operated by New Jersey American Water or Middlesex Water Company, before being distributed to local homes and around Roselle Park, a borough situated near Newark and Elizabeth.

Geologically, the area is underlain by the Newark Basin’s red bed formations, specifically Lockatong and Brunswick Formation shales and sandstones from the Triassic period. As water flows through these sedimentary rocks and soils, it picks up dissolved minerals. Glacial till deposited during the Wisconsinan glaciation also contributes to the sediment load, and urban runoff can affect the water's chemistry. This geological makeup results in moderately mineralized water, a typical characteristic of mixed surface and groundwater systems found in urban areas of Union County.

At moderately hard levels, you might notice some scale buildup in appliances like dishwashers and water heaters, which can decrease their efficiency and shorten their lifespan. Faucet aerators and showerheads can also become clogged, and you may find spots on dishes after they're washed. While soap may not lather quite as easily, addressing these issues can be worthwhile. Regularly descaling with vinegar, installing scale filters, or considering a water softener can help prevent higher energy costs and extend the life of your household appliances by years. Roselle Park's water has recently shown 7 contaminants exceeding EPA health guidelines, including potential PFAS, so using certified filters is advised.