Casselberry Water Hardness & Quality Report (2026)

The City of Casselberry Utilities Division provides drinking water to approximately 55,000 residents in Casselberry, Florida, located in southern Seminole County, about 10 miles north of downtown Orlando. The utility sources all water from groundwater via the Floridan Aquifer System. Treatment occurs at plants with an average daily flow of 4.0 million gallons per day (MGD), employing aeration, granular activated carbon filtration, and disinfection processes. Residents may contact the Utility Divisions Director at 407-262-7725 Ext. 1228 for Consumer Confidence Reports.

Casselberry's supply originates from the Floridan Aquifer, a vast karst system shaped by Eocene and Oligocene limestone and dolomite formations including the Ocala Limestone and Avon Park Formation. These carbonate-rich layers dissolve over time, enriching the groundwater with dissolved calcium and magnesium and resulting in a moderately hard supply. The aquifer's geology promotes higher mineralisation compared to non-limestone regions, while natural fluoride levels of around 0.2 ppm occur without added fluoridation — characteristic of central Florida's carbonate terrain.

Moderately hard water in Casselberry can lead to moderate scale buildup on fixtures, dishes, and appliances like coffee pots, water heaters, and dishwashers, with spotting on glassware and reduced efficiency in laundry detergents. Maintenance tips include using white vinegar as a rinse agent in dishwashers, soaking faucets overnight in vinegar, and running vinegar cycles through coffee makers; a water softener is often recommended, especially for laundry and bathing. Water quality testing shows compliance with federal limits — Gross Alpha Activity at 2.2 pCi/L remains well below the EPA MCL of 15 pCi/L. Treatment employs aeration, GAC filtration, and disinfection; the city does not fluoridate, and natural fluoride is approximately 0.2 ppm.