Melbourne Water Hardness & Quality Report (2026)

Melbourne, Florida, in Brevard County on the Atlantic coast (the Space Coast), draws its municipal water supply exclusively from Upper Floridan Aquifer groundwater via the City of Melbourne Utilities Water Division. Melbourne's wells access the Eocene Avon Park Formation (dolomitic limestone — highly reactive carbonate) and the Ocala Limestone Group at depths of 150–400 feet beneath Brevard County's coastal plain. The Space Coast area relies on Floridan Aquifer groundwater for virtually all municipal supply. Water hardness reaches 328.5 mg/L — classified as very hard.

Melbourne's very hard supply reflects the Upper Floridan Aquifer's highly dissolving carbonate system in Brevard County. The Avon Park Formation — the dominant producing unit in the Brevard County Floridan zone — is a dolomitic limestone with extremely high carbonate reactivity. Dolomite ($CaMg(CO_3)_2$) dissolves readily and contributes both calcium and magnesium to groundwater. The Floridan Aquifer in Brevard County at Melbourne's latitude shows a particularly high dissolved mineral content, reflecting the long groundwater flow paths through the thick Avon Park dolomite section. The Space Coast's proximity to the Atlantic coast and the regional flow dynamics in the Floridan produce the very hard supply characteristic of this zone.

At 328.5 mg/L, Melbourne residents face significant hard water challenges throughout the home. Scale deposits form rapidly on shower glass, tile, chrome, and faucet aerators — regular descaling with commercial citric acid products is essential. Dishwashers accumulate heavy scale requiring rinse-aid plus periodic internal cleaning. City of Melbourne Utilities consistently delivers water meeting all Florida DEP and EPA Safe Drinking Water Act requirements.