Merritt Island Water Hardness & Quality Report (2026)

Merritt Island receives its drinking water primarily through the Cocoa Water System and Brevard County Utility Services, which together serve the broader Space Coast region including Cocoa and surrounding areas. The supply is drawn from groundwater wells tapping the Floridan aquifer. The City of Cocoa's water treatment plants process up to 27.1 million gallons per day during peak summer demand, with annual throughput around 8.2 billion gallons. These utilities distribute treated groundwater across unincorporated Brevard County areas, delivering service to Merritt Island residents throughout the region.

The groundwater originates from the Upper Floridan aquifer, whose extensive recharge area spans north and central Florida, where rainfall percolates through surficial sands into underlying limestone. Dominant geological features are thick sequences of Paleogene limestone formations including the Ocala Limestone (Eocene), characterized by high calcium carbonate content. This karst terrain promotes rapid infiltration and mineral leaching, dissolving calcium and magnesium ions into the groundwater to produce a naturally hard, moderately mineralized supply typical of central Florida's carbonate geology.

At moderately hard levels, scale buildup occurs noticeably on fixtures, reducing efficiency in water heaters, dishwashers, and washing machines, while leaving spots on glassware and causing dry skin after bathing. Coffee makers and faucets accumulate mineral deposits over time. Regular vinegar descaling and installing drain screens help mitigate these effects; a water softener is often recommended for affected households to extend appliance life and improve soap efficiency. Water quality testing by Cocoa and Brevard County confirms EPA compliance for lead and copper under the LCR; treatment includes aeration, filtration, disinfection with chloramines, and corrosion control, with PFAS monitoring ongoing and no violations reported.