Doral Water Hardness & Quality Report (2026)

The Miami-Dade Water and Sewer Department (WASD) provides water services to Doral, Florida, located in Miami-Dade County. Doral receives its supply from the Floridan Aquifer System via multiple groundwater treatment plants, including the Hialeah and John E. Preston plants. These facilities treat raw groundwater pumped from deep wells in the Biscayne Aquifer and upper Floridan zones, serving over 2.4 million residents across the county, with Doral fully within the service area.

Doral's water originates from the groundwater recharge area tied to the Everglades watershed and South Florida's coastal plain. The supply is drawn from the karstic Floridan Aquifer, featuring Eocene limestone formations including the Ocala Limestone and Avon Park Formation that dissolve readily, contributing calcium and magnesium ions. This carbonate-rich geology imparts a hard supply character, while treatment manages color and particulates from organic influences in shallower zones.

Hard water in Doral promotes significant scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Soap scum, dry skin, and faded laundry are common effects. Regular descaling with vinegar, sediment filters, and high-efficiency detergents help mitigate impacts. A water softener is strongly recommended to prevent appliance damage. Treated water has a pH of 7.5–8.5; the utility complies with EPA lead and copper rules via orthophosphate corrosion inhibitors. Notable contaminants include low levels of naturally occurring radium and arsenic from aquifer geology, addressed via lime softening, aeration, and filtration. Disinfection uses chloramine; no specific PFAS exceedances are reported in recent CCRs.