Toms River Water Hardness & Quality Report (2026)

Toms River (Ocean County seat), New Jersey, in the New Jersey Pinelands coastal area, draws its municipal water supply from groundwater — the Coastal Plain aquifer system — through New Jersey American Water Company service and the Ocean County Utilities Authority, tapping the Cohansey Aquifer (shallow unconfined) and the deeper confined Potomac–Raritan–Magothy (PRM) Aquifer beneath the Atlantic Coastal Plain of Ocean County. Water hardness measures 178.5 mg/L — classified as hard.

Toms River's hard supply — surprising given the New Jersey Pinelands' reputation for very soft, acidic water — reflects the depth of the aquifer being tapped. The shallow Cohansey Aquifer (Miocene Kirkwood–Cohansey Formation silica sand and gravel) in the Pinelands is indeed very soft and acidic. However, the deeper Potomac–Raritan–Magothy (PRM) confined aquifer system (Cretaceous) in Ocean County has significantly higher dissolved mineral content — drawing from Cretaceous calcareous sediment formations deeper in the coastal plain sequence, with long groundwater residence times that allow extensive carbonate equilibration. Ocean County's water supply draws from a blend of these aquifer depths, producing hard finished water substantially different from the Pinelands' surface character.

At 178.5 mg/L, Toms River residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. Dishwashers require rinse-aid for clean glassware, and water heaters benefit from annual inspection. New Jersey American Water and Ocean County Utilities consistently deliver water meeting all NJDEP and EPA Safe Drinking Water Act requirements.