West Palm Beach Water Hardness & Quality Report (2026)

West Palm Beach, Florida — Palm Beach County seat and a major South Florida city — draws its municipal water supply through the City of West Palm Beach Water Utilities, sourcing primarily from the Surficial Aquifer System (primarily the Biscayne Aquifer in its northern extent, transitioning to the Anastasia Formation aquifer in Palm Beach County) via the Grassy Waters Preserve wellfield in northern Palm Beach County. The Biscayne Aquifer here reaches its northernmost extent; Palm Beach County's aquifer system transitions from the pure Biscayne formation to the Anastasia Formation and Fort Thompson Formation — a somewhat different carbonate sequence. Water hardness measures 170.5 mg/L — classified as hard.

West Palm Beach's hard supply reflects the Palm Beach County surficial aquifer carbonate character. The Anastasia Formation (Pleistocene coquina limestone — a biogenic calcareous rock composed of shell fragments and sand cemented by calcium carbonate) is the principal aquifer unit in Palm Beach County, supplemented by the Fort Thompson Formation and the Miami Limestone. The Anastasia Formation, being younger and composed of calcareous shell debris, dissolves readily to contribute high dissolved calcium to groundwater. Palm Beach County's aquifer zone, set further north than the classic Biscayne zone but still within the coastal carbonate belt, produces hard water with consistent calcium bicarbonate character.

At 170.5 mg/L, West Palm Beach residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, shower glass, and tile within weeks — monthly descaling with citric acid solution is standard maintenance. Dishwashers produce better results with rinse-aid, and water heaters benefit from annual inspection for element scale. City of West Palm Beach Water Utilities consistently delivers water meeting all Florida DEP and EPA Safe Drinking Water Act requirements.