Sayreville Water Hardness & Quality Report (2026)

Sayreville, New Jersey, in Middlesex County on the Raritan River and Raritan Bay — a diverse Central New Jersey community on the South Amboy peninsula, home of Raritan Bay Waterfront Park, historically one of the largest brick-making centers in the United States (Sayreville supplied bricks for major New York City and Philadelphia buildings), a growing diverse Middlesex County community with significant South Asian and Caribbean immigrant populations — draws its municipal water supply from the Potomac–Raritan–Magothy (PRM) aquifer via the Sayreville Water Department. Water hardness in Sayreville measures 104 mg/L — classified as moderately hard.

Sayreville's moderate hardness reflects the Middlesex County New Jersey Coastal Plain aquifer characteristics. The PRM Aquifer (Cretaceous Raritan and Magothy Formations — calcareous-moderate sand with interbedded clay — the major aquifer of coastal New Jersey) at Sayreville provides a moderately calcareous supply. The Raritan Formation at Sayreville–Middlesex County includes calcareous–lignitic sands with moderate dissolved calcium. The Sayreville Water Department's well fields tap the PRM aquifer at moderate depth in the Raritan Bay coastal plain, producing the moderate 104 mg/L.

At 104 mg/L, Sayreville residents encounter moderate scale accumulation. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is practical maintenance. Sayreville Water Department consistently delivers water meeting all New Jersey DEP and EPA Safe Drinking Water Act requirements.