Well water hardness in Florida
Across 33 counties of Florida, the median well sampled by the USGS has 11.9 gpg of hardness. Counties range from 2.5 gpg (Escambia County) to 25.5 gpg (Charlotte County).
Millions of American households drink water from their own well. No utility tests that water and no water quality report covers it. These pages summarise the hardness the U.S. Geological Survey measured in wells county by county, so you know what to expect before you test your own well.
Counties, hardest first
| gpg | mg/L | wells | ||
|---|---|---|---|---|
| Charlotte County | 25.5 | 437 | 31 | very hard |
| Sarasota County | 23 | 395 | 203 | very hard |
| St. Lucie County | 20.9 | 357 | 27 | very hard |
| Lee County | 20.7 | 355 | 96 | very hard |
| DeSoto County | 18.6 | 319 | 67 | very hard |
| Palm Beach County | 18 | 309 | 212 | very hard |
| Hendry County | 17.4 | 298 | 24 | very hard |
| Pinellas County | 17.3 | 297 | 186 | very hard |
| Martin County | 17.2 | 295 | 23 | very hard |
| Duval County | 17.1 | 293 | 77 | very hard |
| Broward County | 16.8 | 287 | 171 | very hard |
| Collier County | 16.7 | 286 | 85 | very hard |
| Orange County | 15.9 | 272 | 111 | very hard |
| Miami-Dade County | 14.5 | 249 | 244 | very hard |
| Levy County | 13 | 223 | 16 | very hard |
| Hardee County | 12.3 | 210 | 43 | very hard |
| Sumter County | 11.9 | 204 | 47 | very hard |
| Lafayette County | 10.6 | 182 | 14 | very hard |
| Suwannee County | 10 | 171 | 52 | hard |
| Wakulla County | 9.9 | 169 | 39 | hard |
| Pasco County | 9.7 | 166 | 139 | hard |
| Hillsborough County | 8.9 | 152 | 226 | hard |
| Marion County | 8.9 | 152 | 103 | hard |
| Taylor County | 8.8 | 150 | 10 | hard |
| Lake County | 8.6 | 148 | 33 | hard |
| Hernando County | 8.5 | 145 | 79 | hard |
| Osceola County | 8.3 | 142 | 29 | hard |
| Citrus County | 7.4 | 127 | 55 | hard |
| Polk County | 7.1 | 121 | 273 | hard |
| Jackson County | 6.8 | 116 | 39 | moderately hard |
| Leon County | 5.9 | 102 | 88 | moderately hard |
| Highlands County | 4.5 | 77 | 71 | moderately hard |
| Escambia County | 2.5 | 43 | 26 | soft |
Counties with fewer than 10 sampled wells, or a median outside 5–500 mg/L, are not shown until the figure is reviewed.
Florida: tap water hardness by city → · Well water hardness by state and county →