Altamonte Springs Water Hardness & Quality Report (2026)

The City of Altamonte Springs Water Department serves approximately 50,000 residents in Seminole County, Florida, providing drinking water through six wells tapping the Floridan Aquifer. There are no named surface water reservoirs or rivers used; the supply is entirely groundwater. Treatment occurs at city-operated facilities including tray aeration to remove hydrogen sulfide, chlorination for disinfection, and orthophosphate addition for corrosion control. Fluoridation was discontinued in recent years, and the service area covers the city and surrounding areas in central Florida within the St. Johns River Water Management District watershed.

Water originates from the Floridan Aquifer, whose geology features thick sequences of karst limestone from the Eocene epoch, including the Ocala Limestone and Avon Park Formation. These soluble carbonate rocks dissolve over time through groundwater flow, releasing calcium and magnesium ions that impart a hard water character typical of the region. The absence of significant surface runoff dilution means extracted groundwater retains high mineral content from prolonged interaction with these Eocene to Oligocene limestone layers, driving hardness levels characteristic of central Florida.

Scale buildup from hard water becomes noticeable on fixtures, reducing efficiency in water heaters, dishwashers, and washing machines; pipes may narrow over time, increasing energy costs. Regular vinegar descaling and drain screens help mitigate issues, and a water softener is recommended to extend appliance life and improve soap efficiency. The 2024 Annual Drinking Water Quality Report confirms compliance with all federal and state standards. Treatment includes aeration, chloramination, and corrosion inhibitors; hydrogen sulfide odor is addressed via aeration. No MCL violations for lead or copper; the city advises flushing taps to minimize lead exposure; PFAS testing is ongoing with no exceedances reported.