Marlboro Water Hardness & Quality Report (2026)

Marlboro Township Water Utility Division serves Marlboro Township in Monmouth County, New Jersey, providing drinking water to residential and commercial customers across approximately 30 square miles. The utility sources its supply primarily from groundwater wells tapping into the Potomac-Raritan-Magothy aquifer system. Key facilities include multiple production wells and a treatment plant fully equipped for filtration, disinfection, and corrosion control. The system meets or exceeds all federal, state, and local drinking water standards as per municipal reports, with no lead service lines present in the distribution network.

Marlboro's water originates from the groundwater recharge area within the Atlantic Coastal Plain, specifically the unconfined Wenonah-Mount Laurel Aquifer and confined portions of the Potomac-Raritan-Magothy system. These Cretaceous-age formations feature glauconite-rich sands, clays, and gravelly lenses that impart minerals to percolating water. The geology of Monmouth County's coastal plain, with its soluble carbonate and ferrous minerals in the bedrock, shapes a hard supply characterized by naturally elevated dissolved solids from prolonged contact with sedimentary strata.

At this hard level, scale buildup from calcium and magnesium deposits reduces efficiency in water heaters, dishwashers, washing machines, and coffee makers by up to 50% over time. Pipes may narrow, increasing energy costs and pressure loss, while soap lathering diminishes, leading to dry skin and spotted dishes. Regular maintenance includes annual descaling, drain screens, and vinegar soaks for fixtures. A water softener is recommended to extend equipment life. Treatment involves chlorination, aeration and filtration for iron and manganese removal, and pH adjustment in the 7.0–8.5 range; no specific PFAS data is noted in available reports but the water surpasses standards for bacteria, nitrates, and disinfection byproducts.