Pinecrest Water Hardness & Quality Report (2026)

Pinecrest, Florida, in Miami-Dade County — an incorporated Miami-Dade County village in south Miami adjacent to Coral Gables and South Miami, one of Miami's most affluent residential communities — receives its municipal water from Miami-Dade Water and Sewer Department (WASD), drawing from the Biscayne Aquifer through the south Miami-Dade wellfield system.

The very hard 273.5 mg/L hardness and very high TDS of 859.3 mg/L make Pinecrest one of the hardest and highest-TDS supplies in the Miami area — significantly harder than Coconut Grove (107.5 mg/L, TDS 255) or Ives Estates (177.5 mg/L, TDS 479). The Biscayne Aquifer in the Pinecrest area accesses the Pleistocene Miami Limestone and the deeper Key Largo Limestone (a coral reef limestone with exceptionally high dissolved carbonate) at the transition zone near the Atlantic Coastal Ridge. This zone is subject to increased saltwater intrusion (elevated sodium and chloride contributing to TDS) and very prolonged carbonate rock-water contact, producing the extreme hardness and TDS characteristic of the south Pinecrest wellfield zone.

At 273.5 mg/L with TDS 859 mg/L, Pinecrest's water is very hard with very high TDS. A whole-house water softener is recommended and kitchen reverse osmosis filtration for drinking and cooking is strongly advised given the TDS approaching the EPA aesthetic guideline. The PFAS level of 11.2 ppt warrants a certified reverse osmosis drinking water filter — Homestead Air Reserve Base (south Miami-Dade — major AFFF user), Opa Locka Airport (AFFF legacy), and the south Miami-Dade industrial PFAS complex contribute to Pinecrest's elevated readings.