Every water utility in Florida publishes a Consumer Confidence Report (CCR) annually. For Tampa Bay area homeowners, these reports reveal significant variation in water hardness across utilities, information that directly affects your appliances, plumbing, and water treatment needs.
Tampa Bay Water (Regional Supplier)
Tampa Bay Water is the regional wholesale supplier for most of the Bay area. Their 2024 CCR reports total dissolved solids averaging 220 to 280 mg/L depending on season, with hardness ranging from 100 to 180 mg/L (approximately 6 to 10 gpg). The blend of surface water from the Hillsborough River reservoir, groundwater from the wellfields, and desalinated water from the Apollo Beach facility changes throughout the year.
City of Tampa
The City of Tampa distributes Tampa Bay Water blend with additional local treatment. Reported hardness averages approximately 130 mg/L (7.6 gpg), moderate by Florida standards but sufficient to cause scale accumulation over time.
Pinellas County Utilities
Pinellas County utilities report higher hardness, typically 150 to 200 mg/L (8.8 to 11.7 gpg). St. Petersburg and Clearwater both serve areas with measurably harder water than Tampa proper.
Hillsborough County
Hillsborough County areas served by well water rather than Tampa Bay Water blend can see hardness levels of 200 to 350 mg/L (11.7 to 20.5 gpg), among the highest in the region.
What the Numbers Mean for Your Home
Water above 7 gpg is classified as hard. Above 10.5 gpg is very hard. Most Tampa Bay area homes fall in the hard to very hard range. At these levels, professional water treatment is not a luxury, it is a practical investment in your home's infrastructure.