Deerfield Beach Water Hardness & Quality Report (2026)

Deerfield Beach, Florida, on the Broward–Palm Beach County border along the Atlantic Coast, draws its municipal water supply from the Biscayne Aquifer via the City of Deerfield Beach Water Treatment Division, pumping from the northern Broward County Biscayne Aquifer wellfields accessing the Pleistocene Fort Lauderdale Limestone and Anastasia Formation — the local aquifer units at the northern extent of the Miami-Dade/Broward Biscayne system transitioning toward the Palm Beach County Surficial Aquifer. Water hardness in Deerfield Beach measures 270 mg/L — classified as very hard.

Deerfield Beach's very hard supply reflects the northern Broward County Biscayne Aquifer's carbonate character. The Fort Lauderdale Limestone and Anastasia Formation in northern Broward County are highly porous Pleistocene limestone and coquina formations — formed from marine shell hash, oolite, and bioclastic material — that dissolve readily in the South Florida shallow water table environment. The high porosity of these formations, combined with the sub-tropical climate's rapid groundwater recharge, creates a very reactive dissolution environment that maintains high dissolved calcium concentrations in the Biscayne Aquifer throughout Broward and Palm Beach Counties.

At 270 mg/L, Deerfield Beach residents face significant hard water challenges. Scale deposits form rapidly on faucet aerators, showerheads, shower glass, and tile — monthly descaling with citric acid solution is essential maintenance. Dishwashers require rinse-aid plus periodic cleaning. City of Deerfield Beach Water Treatment consistently delivers water meeting all Florida DEP and EPA Safe Drinking Water Act requirements.