Oviedo Water Hardness & Quality Report (2026)

Oviedo, Florida, in Seminole County east of Orlando — a rapidly growing Seminole County Orlando east suburban community, home of the University of Central Florida Research Park area, known for the 'Oviedo Chickens' (a legendary flock of wild chickens that has roamed downtown Oviedo for decades — a beloved local quirk and tourist curiosity), a diverse Seminole County community in one of Florida's fastest-growing corridors, and a major Orlando metro east suburban community — draws its municipal water supply from the Upper Floridan Aquifer via the City of Oviedo Water Division. Water hardness in Oviedo measures 148.5 mg/L — classified as moderately hard.

Oviedo's moderate hardness — softer than many Florida Floridan Aquifer communities — reflects the City of Oviedo's effective lime softening program. The Upper Floridan Aquifer in Seminole County is hosted in the Eocene Ocala Limestone and Hawthorn Group (highly calcareous dolomite and limestone — raw hardness typically 200–300 mg/L). The City of Oviedo applies a well-designed lime softening program, substantially reducing hardness from raw levels. The Oviedo lime softening treatment produces the moderate 148.5 mg/L — notably softer than many nearby central Florida communities.

At 148.5 mg/L, Oviedo residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. City of Oviedo Water Division consistently delivers water meeting all Florida DEP and EPA Safe Drinking Water Act requirements.