Clearwater Water Hardness & Quality Report (2026)

Pinellas County Utilities supplies drinking water to the City of Clearwater and surrounding communities in Pinellas County, Florida, serving over 300,000 residents across a 446-square-mile service area. All drinking water is sourced exclusively from the Floridan aquifer system via multiple wellfields throughout the peninsula. Key infrastructure includes the Gulf-to-Bay Advanced Wastewater Treatment Facility and several groundwater treatment plants that pump, treat, and distribute water to homes and businesses across the entire service area.

The Floridan aquifer's recharge areas are shaped by the peninsula's karst topography. Water moves through thick sequences of limestone and dolomitic formations from the Eocene and Oligocene epochs — notably the Ocala Limestone and Avon Park Formation — which naturally dissolve to enrich the supply with minerals. Prolonged rock–water interaction in these confined aquifer layers, at depths of hundreds to thousands of feet, produces a characteristically hard supply with elevated calcium, magnesium, and dissolved solids typical of Florida's groundwater.

Very hard water at 207 mg/L promotes significant scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Fixtures such as faucets and showerheads clog readily, while soap lathering diminishes, causing dry skin and higher detergent use. Regular vinegar descaling, annual appliance maintenance, and installing a water softener with brine tank are strongly recommended. The 2021 CCR reports pH averaging 7.95 and alkalinity around 170 ppm; the utility complies with lead/copper rules and monitors for naturally occurring radium and arsenic, with all contaminants below MCLs. Treatment involves aeration, filtration, chloramination, and fluoridation.