Orlando Water Hardness & Quality Report (2026)

Orlando's water is supplied by the City of Orlando Utilities Commission (OUC) and Orange County Utilities, both drawing entirely from the Floridan Aquifer System — the primary source for all of central Florida. OUC operates a network of production wells in Orange County accessing the Upper Floridan Aquifer at depths ranging from 150 to 400 feet, treating the water at the Iron Bridge Water Reclamation Facility and supplementary treatment plants before distribution. Orange County Utilities serves unincorporated suburban areas surrounding Orlando through its own well field network tapping the same Upper Floridan Aquifer. Central Florida's extraordinary density of natural lakes — Orlando sits within the Lake Wales Ridge karst lake district — is a surface expression of the same porous limestone geology that underlies the entire regional water supply system.

Orlando's moderate hardness of 128.5 mg/L reflects the carbonate geology of the Upper Floridan Aquifer at typical central Florida depths. The aquifer is contained within the Eocene Ocala Limestone Group and Oligocene Suwannee Limestone — ancient tropical marine carbonate platforms that underlie all of peninsular Florida below the surficial sands. At the depths tapped by Orlando well fields, the Floridan Aquifer water has moderate residence times and contacts carbonate rock sufficiently to accumulate moderate calcium and bicarbonate content, without reaching the extreme hardness of deeper confined aquifer zones or the high-sulfate sections characteristic of some south Florida supplies.

Orlando residents experience moderate hard-water effects: gradual scale deposits on shower fixtures, some reduction in soap lather compared to soft-water cities, and mild dishwasher spotting that rinse-aid resolves easily. Descaling coffee makers and kettles every 2–3 months keeps appliances running well. The very warm Central Florida climate can accelerate evaporative scale formation on outdoor fixtures and pool surrounds, so monthly attention to outdoor water features is practical. A carbon-block under-sink filter improves drinking water taste for residents sensitive to the mineral and treatment characteristics of deep Floridan Aquifer supply.