Pompton Lakes Water Hardness & Quality Report (2026)

Pompton Lakes Municipal Utilities Authority provides water to about 11,000 people in Pompton Lakes, New Jersey. Their supply comes from the Pompton River, which flows into the Passaic River, and from groundwater wells drawing from local aquifers. Water is treated at the PLMUA Water Treatment Plant, where river water undergoes coagulation, sedimentation, filtration, and disinfection before reaching homes. The Pompton River Watershed, part of the larger Passaic River Basin, is the origin of this water, flowing through areas that include the Watchung Mountains and Piedmont lowlands.

Geologically, the water interacts with Triassic Brunswick Group sandstones, shales, and trap rocks. Groundwater is drawn from the Passaic Formation's unconsolidated sands and gravels, which sit above bedrock. Glacial deposits also contribute minerals. This combination of sedimentary rocks and glacial till, which often contain limestone and dolomite, dissolves into the water. This process naturally increases the mineral content, resulting in a hard water supply characteristic of this region of northern New Jersey.

This moderately hard water can lead to scale buildup in appliances like water heaters, dishwashers, and washing machines. This scale reduces efficiency and can shorten their lifespan, potentially increasing energy costs. You might also notice white deposits on fixtures and soap scum that's harder to rinse away. To manage these effects, consider regular descaling with vinegar and installing low-flow aerators. Many homeowners find a water softener offers the best protection against scale. The PLMUA also monitors for contaminants like PFAS, disinfection byproducts, and naturally occurring radium, with recommendations for filtration in their Consumer Confidence Report.