Martinsville Water Hardness & Quality Report (2026)

American Water's Raritan System 1 draws from the Raritan River, Millstone River, and the Delaware & Raritan Canal. This public community water supply serves numerous municipalities across central New Jersey, including Martinsville, Bedminster, Clark, Cranford, Garwood, Linden, Middlesex, Piscataway, Roselle, Roselle Park, Somerset, South Plainfield, Bound Brook, South Bound Brook, and Westfield. American Water operates treatment facilities that process water from these sources, with the Raritan River watershed encompassing both the Piedmont and Coastal Plain physiographic provinces.

The geology beneath the Martinsville service area is characterized by Cretaceous and Quaternary sediments of the Atlantic Coastal Plain, with older Precambrian crystalline basement rock found deeper below. Dissolved calcium and magnesium minerals, leached from these geological formations, naturally imbue the water with its moderate hardness. The Raritan and Millstone Rivers collect runoff from areas with diverse geology, ultimately contributing to a mixed-hardness water profile for the entire supply system.

At its current hardness level, residents might observe scale buildup on appliances like kettles, coffee makers, and shower heads over time, with water heaters and dishwashers often showing the most significant effects. You'll likely need to use slightly more soap and detergent to achieve effective cleaning. While a water softener isn't strictly necessary, many households opt for one to potentially extend appliance lifespan, enhance cleaning power, and reduce upkeep. It's a good idea to regularly descale high-use appliances. According to American Water's report, the water's pH typically ranges from 6.5 to 8.5, and total hardness averages between 104–130 mg/L.