Miami Gardens Water Hardness & Quality Report (2026)

Miami-Dade Water and Sewer Department (WASD) serves Miami Gardens, Florida, as part of its broader service area in Miami-Dade County, providing drinking water to over 2.4 million county residents including those in Miami Gardens (ZIP codes 33014, 33054, 33055, 33056). The utility draws its supply primarily from the Biscayne Aquifer, a local groundwater source. Water is treated at facilities including the Alexander Orr Jr. Water Treatment Plant and the John E. Preston Water Treatment Plant, with treatment involving disinfection, filtration, and corrosion control before distribution throughout the service area.

The Biscayne Aquifer spans the southeastern U.S. coastal plain, recharged by rainfall and surface water from the Everglades and urban canals. The aquifer consists of solution-riddled limestone formations from the Pleistocene epoch — including the Miami Limestone and Fort Thompson Formation — which naturally dissolve to release calcium and magnesium minerals into the water. This karstic geology results in a moderately mineralised supply with elevated dissolved solids, characteristic of South Florida's limestone-dominated aquifer systems.

In areas with moderately hard water, users may notice moderate scale buildup in appliances like water heaters, dishwashers, and coffee makers, along with reduced soap lathering and potential dry skin. Regular descaling with vinegar solutions and installing drain screens can help mitigate issues. A water softener is recommended for households experiencing noticeable spotting on glassware or film on fixtures. WASD's 2025 Water Quality Report confirms compliance with all federal, state, and local standards, with pH around 7.5–8.5; trace trihalomethanes from chloramination occur but remain below thresholds, and no PFAS detections above MCLs were reported.