Princeton Water Hardness & Quality Report (2026)

Princeton, Florida, an unincorporated community in Miami-Dade County south of Homestead — a largely agricultural unincorporated community in south Miami-Dade County in the Redland agricultural district (one of the most productive tropical and subtropical fruit and vegetable growing areas in the continental United States), adjacent to Homestead and the Everglades agricultural fringe, and a community near Biscayne National Park and the northern Everglades buffer zone — draws its municipal water supply from the Biscayne Aquifer via the Miami-Dade Water and Sewer Department (MDWASD). Water hardness in Princeton measures 90 mg/L — classified as moderately soft.

Princeton's moderate softness — much softer than many Florida Biscayne Aquifer communities — reflects MDWASD's effective lime softening program. The Biscayne Aquifer in south Miami-Dade County is the same highly calcareous Pleistocene Miami Limestone as in the rest of Miami-Dade (raw hardness 200–350 mg/L). However, MDWASD applies comprehensive lime softening at the south Miami-Dade treatment facilities, reducing hardness substantially. The MDWASD south distribution zone (Homestead–Princeton area) receives the softened supply, producing the moderate 90 mg/L.

With hardness at 90 mg/L, Princeton residents enjoy moderately soft water despite the calcareous Biscayne Aquifer source. MDWASD consistently delivers water meeting all Florida DEP and EPA Safe Drinking Water Act requirements.