Water Hardness in Florida
Across 84 measured cities — with 210 more covered by labeled county-level estimates — Florida's median tap water hardness is 86.8 mg/L (5.1 gpg): moderately hard on the USGS scale. Below: every covered city, the state's hardest and softest water, and the geology that explains it.
Data updated September 13, 2026. Sources: utility-reported water quality data and USGS/EPA Water Quality Portal samples.
What it costs to soften Florida water
Water softener cost in Florida at 5.1 gpg prices the equipment and the installation labour against the plumber wages published for Florida, and labels every range as modelled or measured rather than leaving you to guess which it is.
Florida · 5.08 grains per gallon
$926–$1,155
installed, midpoint $1,028 — a 24,000-grain unit, the size 4 people at this hardness need.
Salt and drain water over 10 years: $612–$1,235 — the 5,562,600 grains of hardness this household removes, at the national salt price and water rate whose sources are named below. Filter changes and Service contract are omitted rather than assumed.
Sized for 4 people regenerating every 7 days: 10,668 grains of capacity needed, rounded up to the next common residential size. The median of 84 measured Florida cities in our hardness dataset. Modelled: the standard build band published for that state at the size this hardness calls for, equipment priced 2026-10-04 against the May 2025 reference period (OEWS M2025). Salt: the median retailer price of 3 retailers, read 2026-10-04, at a declared salt dose per regeneration. Drain water: about 50 gallons per regeneration from a government extension estimate read 2026-10-04, at the 2024 national average water and sewer rate from a government source read 2026-10-04.
Deciding whether it is worth it at all? Start from how much a water softener costs nationally — the same equipment, installation and ten-year ownership breakdown before any state wage adjustment is applied.
Florida Cities by Hardness Category
Measured cities only — labeled county estimates never enter the category counts or the median.
| Category | Range | Measured cities | Share |
|---|---|---|---|
| Soft | 0-60 mg/L | 25 | 29.8% |
| Moderately hard | 60-120 mg/L | 35 | 41.7% |
| Hard | 120-180 mg/L | 20 | 23.8% |
| Very hard | >180 mg/L | 4 | 4.8% |
Hardest and Softest Water in Florida
Measured values only; labeled county estimates and values under active dispute never rank.
Hardest water in Florida
- Apalachicola — 291.0 mg/L (17.0 gpg), very hard
- Jacksonville Beach — 234.0 mg/L (13.7 gpg), very hard
- Clearwater — 190.0 mg/L (11.1 gpg), very hard
- Jacksonville — 189.0 mg/L (11.1 gpg), very hard
- St. Augustine — 167.0 mg/L (9.8 gpg), hard
Softest water in Florida
- Lake Buena Vista — 2.7 mg/L (0.2 gpg), soft
- Plantation — 12.2 mg/L (0.7 gpg), soft
- Sunrise — 12.6 mg/L (0.7 gpg), soft
- Cooper City — 14.3 mg/L (0.8 gpg), soft
- Davie — 15.9 mg/L (0.9 gpg), soft
Every Covered City in Florida
All 294 covered Florida cities, sorted by population served. "County estimate" rows are labeled context values from USGS/EPA Water Quality Portal county sampling — they never enter the median above. City names link to each city's full water quality page.
| City | Hardness (mg/L) | gpg | Category | Data |
|---|---|---|---|---|
| Miami | 212.0 | 12.4 | Very hard | County estimate |
| Jacksonville | 189.0 | 11.1 | Very hard | Utility-reported |
| Tampa | 139.0 | 8.1 | Hard | Utility-reported |
| Apollo Beach | 141.0 | 8.3 | Hard | County estimate |
| Riverview | 141.0 | 8.3 | Hard | County estimate |
| Orlando | 129.0 | 7.5 | Hard | Utility-reported |
| St. Petersburg | 124.0 | 7.3 | Hard | Utility-reported |
| Cocoa | 103.0 | 6.0 | Moderately hard | Utility-reported |
| Lehigh Acres | 262.0 | 15.3 | Very hard | County estimate |
| Hialeah | 212.0 | 12.4 | Very hard | County estimate |
| Port St Lucie | 66.9 | 3.9 | Moderately hard | Utility-reported |
| Punta Gorda | 295.0 | 17.3 | Very hard | County estimate |
| Tallahassee | 136.0 | 8.0 | Hard | Utility-reported |
| Gainesville | 140.0 | 8.2 | Hard | Utility-reported |
| Lakeland | 137.0 | 8.0 | Hard | Utility-reported |
| Pembroke Pines | 53.3 | 3.1 | Soft | Utility-reported |
| Fort Lauderdale | 51.5 | 3.0 | Soft | Utility-reported |
| Ft Lauderdale | 51.5 | 3.0 | Soft | Utility-reported |
| North Miami Beach | 212.0 | 12.4 | Very hard | County estimate |
| Melbourne | 91.3 | 5.3 | Moderately hard | Utility-reported |
| Melbourne Village | 91.3 | 5.3 | Moderately hard | Utility-reported |
| Cape Coral | 60.1 | 3.5 | Moderately hard | Utility-reported |
| Port Charlotte | 295.0 | 17.3 | Very hard | County estimate |
| Kissimmee | 52.4 | 3.1 | Soft | County estimate |
| Hollywood | 50.8 | 3.0 | Soft | Utility-reported |
| Lake Buena Vista | 2.7 | 0.2 | Soft | Utility-reported |
| Fellsmere | 182.8 | 10.7 | Very hard | County estimate |
| Boca Raton | 68.2 | 4.0 | Moderately hard | Utility-reported |
| Winter Haven | 67.2 | 3.9 | Moderately hard | County estimate |
| Miramar | 18.1 | 1.1 | Soft | Utility-reported |
| Sebastian | 258.6 | 15.1 | Very hard | County estimate |
| Palm Bay | 120.0 | 7.0 | Moderately hard | Utility-reported |
| Clearwater | 190.0 | 11.1 | Very hard | Utility-reported |
| Boynton Beach | 74.2 | 4.3 | Moderately hard | Utility-reported |
| West Palm Beach | 65.9 | 3.9 | Moderately hard | Utility-reported |
| Jensen Beach | 73.0 | 4.3 | Moderately hard | Utility-reported |
| Miami Beach | 35.2 | 2.1 | Soft | Utility-reported |
| Middleburg | 56.0 | 3.3 | Soft | County estimate |
| Palm Coast | 67.9 | 4.0 | Moderately hard | Utility-reported |
| Palm Beach Gardens | 84.5 | 4.9 | Moderately hard | Utility-reported |
| Belleview | 143.0 | 8.4 | Hard | County estimate |
| Fort Myers | 43.3 | 2.5 | Soft | Utility-reported |
| Jupiter | 93.4 | 5.5 | Moderately hard | Utility-reported |
| North Miami | 89.2 | 5.2 | Moderately hard | Utility-reported |
| Daytona Beach | 23.8 | 1.4 | Soft | Utility-reported |
| Key West | 143.9 | 8.4 | Hard | County estimate |
| Plantation | 12.2 | 0.7 | Soft | Utility-reported |
| Pompano Beach | 40.8 | 2.4 | Soft | Utility-reported |
| Winter Park | 101.0 | 5.9 | Moderately hard | Utility-reported |
| Sanford | 165.0 | 9.7 | Hard | Utility-reported |
| Sunrise | 12.6 | 0.7 | Soft | Utility-reported |
| Deltona | 132.0 | 7.7 | Hard | Utility-reported |
| Deland | 190.9 | 11.2 | Very hard | County estimate |
| Lauderdale Lakes | 52.0 | 3.0 | Soft | Utility-reported |
| Port Orange | 190.9 | 11.2 | Very hard | County estimate |
| Auburndale | 67.2 | 3.9 | Moderately hard | County estimate |
| Bonita Springs | 69.2 | 4.0 | Moderately hard | Utility-reported |
| Estero | 262.0 | 15.3 | Very hard | County estimate |
| Winter Garden | 114.0 | 6.7 | Moderately hard | Utility-reported |
| Naples | 60.2 | 3.5 | Moderately hard | Utility-reported |
| Delray Beach | 62.0 | 3.6 | Moderately hard | Utility-reported |
| Homestead | 212.0 | 12.4 | Very hard | County estimate |
| Apopka | 152.0 | 8.9 | Hard | Utility-reported |
| New Smyrna Beach | 71.0 | 4.2 | Moderately hard | Utility-reported |
| Panama City Beach | 47.8 | 2.8 | Soft | County estimate |
| Panama City | 47.8 | 2.8 | Soft | County estimate |
| Fort Pierce | 316.0 | 18.5 | Very hard | County estimate |
| Coral Springs | 40.8 | 2.4 | Soft | Utility-reported |
| St. Cloud | 102.0 | 6.0 | Moderately hard | Utility-reported |
| Ocala | 115.0 | 6.7 | Moderately hard | Utility-reported |
| Santa Rosa Beach | 5.6 | 0.3 | Soft | County estimate |
| Deerfield Beach | 60.2 | 3.5 | Moderately hard | Utility-reported |
| Lynn Haven | 47.8 | 2.8 | Soft | County estimate |
| Bartow | 67.2 | 3.9 | Moderately hard | County estimate |
| Bradenton | 145.0 | 8.5 | Hard | County estimate |
| Wellington | 55.1 | 3.2 | Soft | Utility-reported |
| Ormond Beach | 58.5 | 3.4 | Soft | Utility-reported |
| Titusville | 60.8 | 3.6 | Moderately hard | Utility-reported |
| Crestview | 11.8 | 0.7 | Soft | County estimate |
| Sarasota | 92.4 | 5.4 | Moderately hard | Utility-reported |
| Casselberry | 109.9 | 6.4 | Moderately hard | County estimate |
| Sebring | 46.8 | 2.7 | Soft | County estimate |
| North Port | 82.6 | 4.8 | Moderately hard | Utility-reported |
| Weston | 16.0 | 0.9 | Soft | Utility-reported |
| Altamonte Springs | 93.8 | 5.5 | Moderately hard | Utility-reported |
| Pinellas Park | 152.5 | 8.9 | Hard | County estimate |
| Lake Worth | 153.0 | 8.9 | Hard | County estimate |
| Quincy | 28.1 | 1.6 | Soft | County estimate |
| Dunedin | 93.2 | 5.5 | Moderately hard | Utility-reported |
| Leesburg | 129.0 | 7.5 | Hard | Utility-reported |
| St. Augustine | 167.0 | 9.8 | Hard | Utility-reported |
| Eagle Lake | 67.2 | 3.9 | Moderately hard | County estimate |
| Plant City | 159.0 | 9.3 | Hard | Utility-reported |
| Eustis | 133.0 | 7.8 | Hard | County estimate |
| Englewood | 295.0 | 17.3 | Very hard | County estimate |
| Milton | 12.8 | 0.8 | Soft | County estimate |
| Vero Beach | 63.5 | 3.7 | Moderately hard | Utility-reported |
| Winter Springs | 93.8 | 5.5 | Moderately hard | Utility-reported |
| Ocoee | 65.0 | 3.8 | Moderately hard | County estimate |
| Cooper City | 14.3 | 0.8 | Soft | Utility-reported |
| Marco Island | 288.0 | 16.8 | Very hard | County estimate |
| Venice | 101.0 | 5.9 | Moderately hard | Utility-reported |
| Destin | 11.8 | 0.7 | Soft | County estimate |
| Haines City | 67.2 | 3.9 | Moderately hard | County estimate |
| Edgewater | 190.9 | 11.2 | Very hard | County estimate |
| Zephyrhills | 120.0 | 7.0 | Moderately hard | County estimate |
| Tarpon Springs | 33.0 | 1.9 | Soft | Utility-reported |
| Hobe Sound | 182.4 | 10.7 | Very hard | County estimate |
| Groveland | 133.0 | 7.8 | Hard | County estimate |
| Immokalee | 288.0 | 16.8 | Very hard | County estimate |
| Davie | 15.9 | 0.9 | Soft | Utility-reported |
| West Melbourne | 116.0 | 6.8 | Moderately hard | Utility-reported |
| Miramar Beach | 5.6 | 0.3 | Soft | County estimate |
| Niceville | 11.8 | 0.7 | Soft | County estimate |
| Pensacola | 25.0 | 1.5 | Soft | County estimate |
| Fort Walton Beach | 11.8 | 0.7 | Soft | County estimate |
| Waverly | 67.2 | 3.9 | Moderately hard | County estimate |
| Atlantic Beach | 156.0 | 9.1 | Hard | Utility-reported |
| Jacksonville Beach | 234.0 | 13.7 | Very hard | Utility-reported |
| Okeechobee | 126.1 | 7.4 | Hard | County estimate |
| Longwood | 109.9 | 6.4 | Moderately hard | County estimate |
| Lake Wales | 67.2 | 3.9 | Moderately hard | County estimate |
| Brooksville | 165.0 | 9.7 | Hard | County estimate |
| Tavares | 133.0 | 7.8 | Hard | County estimate |
| Midway | 28.1 | 1.6 | Soft | County estimate |
| Avon Park | 46.8 | 2.7 | Soft | County estimate |
| Lake City | 140.0 | 8.2 | Hard | County estimate |
| DeFuniak Springs | 5.6 | 0.3 | Soft | County estimate |
| Lake Mary | 111.0 | 6.5 | Moderately hard | Utility-reported |
| Gulf Breeze | 42.5 | 2.5 | Soft | Utility-reported |
| Dania Beach | 52.1 | 3.0 | Soft | Utility-reported |
| Dade City | 120.0 | 7.0 | Moderately hard | County estimate |
| Stuart | 182.4 | 10.7 | Very hard | County estimate |
| Miami Gardens | 212.0 | 12.4 | Very hard | County estimate |
| Safety Harbor | 136.0 | 8.0 | Hard | Utility-reported |
| Captiva | 262.0 | 15.3 | Very hard | County estimate |
| Oldsmar | 152.5 | 8.9 | Hard | County estimate |
| Clewiston | 147.6 | 8.6 | Hard | County estimate |
| Palmetto | 145.0 | 8.5 | Hard | County estimate |
| Maitland | 132.0 | 7.7 | Hard | Utility-reported |
| Orange City | 190.9 | 11.2 | Very hard | County estimate |
| Palatka | 182.6 | 10.7 | Very hard | County estimate |
| Freeport | 5.6 | 0.3 | Soft | County estimate |
| Wilton Manors | 66.2 | 3.9 | Moderately hard | Utility-reported |
| Sopchoppy | 146.0 | 8.5 | Hard | County estimate |
| Hurlburt Field | 11.8 | 0.7 | Soft | County estimate |
| Jay | 12.8 | 0.8 | Soft | County estimate |
| Bagdad | 12.8 | 0.8 | Soft | County estimate |
| Clermont | 133.0 | 7.8 | Hard | County estimate |
| Valparaiso | 11.8 | 0.7 | Soft | County estimate |
| Mascotte | 133.0 | 7.8 | Hard | County estimate |
| Mims | 258.6 | 15.1 | Very hard | County estimate |
| Cantonment | 25.0 | 1.5 | Soft | County estimate |
| Molino | 25.0 | 1.5 | Soft | County estimate |
| Alachua | 56.1 | 3.3 | Soft | County estimate |
| Wauchula | 87.9 | 5.1 | Moderately hard | County estimate |
| Neptune Beach | 453.0 | 26.5 | Very hard | County estimate |
| Longboat Key | 35.3 | 2.1 | Soft | Utility-reported |
| Fort Myers Beach | 262.0 | 15.3 | Very hard | County estimate |
| LaBelle | 147.6 | 8.6 | Hard | County estimate |
| Chattahoochee | 28.1 | 1.6 | Soft | County estimate |
| Boca Grande | 262.0 | 15.3 | Very hard | County estimate |
| Placida | 295.0 | 17.3 | Very hard | County estimate |
| Surfside | 91.5 | 5.3 | Moderately hard | Utility-reported |
| Flagler Beach | 134.4 | 7.9 | Hard | County estimate |
| Lake Alfred | 67.2 | 3.9 | Moderately hard | County estimate |
| Moore Haven | 126.1 | 7.4 | Hard | County estimate |
| Fort Meade | 67.2 | 3.9 | Moderately hard | County estimate |
| Mexico Beach | 47.8 | 2.8 | Soft | County estimate |
| Oakland | 125.0 | 7.3 | Hard | Utility-reported |
| Mulberry | 67.2 | 3.9 | Moderately hard | County estimate |
| Lake Panasoffkee | 169.0 | 9.9 | Hard | County estimate |
| Frostproof | 67.2 | 3.9 | Moderately hard | County estimate |
| Apalachicola | 291.0 | 17.0 | Very hard | Utility-reported |
| Panacea | 146.0 | 8.5 | Hard | County estimate |
| Carrabelle | 45.2 | 2.6 | Soft | County estimate |
| Mary Esther | 11.8 | 0.7 | Soft | County estimate |
| Graceville | 82.0 | 4.8 | Moderately hard | County estimate |
| Havana | 28.1 | 1.6 | Soft | County estimate |
| Newberry | 56.1 | 3.3 | Soft | County estimate |
| Dundee | 67.2 | 3.9 | Moderately hard | County estimate |
| Blountstown | 92.6 | 5.4 | Moderately hard | County estimate |
| Chipley | 31.5 | 1.8 | Soft | County estimate |
| Bunnell | 134.4 | 7.9 | Hard | County estimate |
| Eglin AFB | 11.8 | 0.7 | Soft | County estimate |
| Century | 25.0 | 1.5 | Soft | County estimate |
| Greensboro | 28.1 | 1.6 | Soft | County estimate |
| Steinhatchee | 197.0 | 11.5 | Very hard | County estimate |
| Everglades City | 288.0 | 16.8 | Very hard | County estimate |
| Bowling Green | 87.9 | 5.1 | Moderately hard | County estimate |
| Bristol | 11.2 | 0.7 | Soft | County estimate |
| Bonifay | 39.2 | 2.3 | Soft | County estimate |
| St. Leo | 120.0 | 7.0 | Moderately hard | County estimate |
| Polk City | 67.2 | 3.9 | Moderately hard | County estimate |
| Lake Helen | 190.9 | 11.2 | Very hard | County estimate |
| Melbourne Beach | 258.6 | 15.1 | Very hard | County estimate |
| Pierson | 190.9 | 11.2 | Very hard | County estimate |
| Welaka | 182.6 | 10.7 | Very hard | County estimate |
| Gretna | 28.1 | 1.6 | Soft | County estimate |
| Parkland | 55.5 | 3.3 | Soft | Utility-reported |
| Bushnell | 169.0 | 9.9 | Hard | County estimate |
| Cross City | 197.0 | 11.5 | Very hard | County estimate |
| Baker | 11.8 | 0.7 | Soft | County estimate |
| Holt | 12.8 | 0.8 | Soft | County estimate |
| Astor | 133.0 | 7.8 | Hard | County estimate |
| Arcadia | 167.0 | 9.8 | Hard | County estimate |
| Lake Hamilton | 67.2 | 3.9 | Moderately hard | County estimate |
| Eastpoint | 45.2 | 2.6 | Soft | County estimate |
| Babson Park | 67.2 | 3.9 | Moderately hard | County estimate |
| Williston | 231.4 | 13.5 | Very hard | County estimate |
| Hawthorne | 56.1 | 3.3 | Soft | County estimate |
| Lloyd | 95.4 | 5.6 | Moderately hard | County estimate |
| Laurel Hill | 11.8 | 0.7 | Soft | County estimate |
| New Port Richey | 120.0 | 7.0 | Moderately hard | County estimate |
| San Antonio | 120.0 | 7.0 | Moderately hard | County estimate |
| Chiefland | 231.4 | 13.5 | Very hard | County estimate |
| Trenton | 215.0 | 12.6 | Very hard | County estimate |
| Wewahitchka | 92.6 | 5.4 | Moderately hard | County estimate |
| Crescent City | 182.6 | 10.7 | Very hard | County estimate |
| Zolfo Springs | 87.9 | 5.1 | Moderately hard | County estimate |
| Sneads | 82.0 | 4.8 | Moderately hard | County estimate |
| Lake Butler | 16.1 | 0.9 | Soft | County estimate |
| Lawtey | 39.8 | 2.3 | Soft | County estimate |
| East Palatka | 182.6 | 10.7 | Very hard | County estimate |
| Wesley Chapel | 124.0 | 7.3 | Hard | Utility-reported |
| Hosford | 11.2 | 0.7 | Soft | County estimate |
| Archer | 56.1 | 3.3 | Soft | County estimate |
| Montverde | 133.0 | 7.8 | Hard | County estimate |
| Palm Harbor | 143.0 | 8.4 | Hard | Utility-reported |
| Bronson | 231.4 | 13.5 | Very hard | County estimate |
| Zellwood | 65.0 | 3.8 | Moderately hard | County estimate |
| Fruitland Park | 133.0 | 7.8 | Hard | County estimate |
| North Fort Myers | 262.0 | 15.3 | Very hard | County estimate |
| Port Richey | 120.0 | 7.0 | Moderately hard | County estimate |
| Silver Springs | 143.0 | 8.4 | Hard | County estimate |
| Hastings | 231.6 | 13.5 | Very hard | County estimate |
| Waldo | 56.1 | 3.3 | Soft | County estimate |
| Webster | 169.0 | 9.9 | Hard | County estimate |
| Grand Ridge | 82.0 | 4.8 | Moderately hard | County estimate |
| Palm Valley | 149.0 | 8.7 | Hard | Utility-reported |
| Medley | 122.0 | 7.1 | Hard | Utility-reported |
| Penney Farms | 56.0 | 3.3 | Soft | County estimate |
| Starke | 39.8 | 2.3 | Soft | County estimate |
| Wildwood | 169.0 | 9.9 | Hard | County estimate |
| Cottondale | 82.0 | 4.8 | Moderately hard | County estimate |
| Ponce de Leon | 5.6 | 0.3 | Soft | County estimate |
| Nokomis | 263.0 | 15.4 | Very hard | County estimate |
| Altha | 92.6 | 5.4 | Moderately hard | County estimate |
| White Springs | 140.0 | 8.2 | Hard | County estimate |
| Center Hill | 169.0 | 9.9 | Hard | County estimate |
| Vernon | 31.5 | 1.8 | Soft | County estimate |
| Brooker | 39.8 | 2.3 | Soft | County estimate |
| Pomona Park | 182.6 | 10.7 | Very hard | County estimate |
| Micanopy | 56.1 | 3.3 | Soft | County estimate |
| Crawfordville | 146.0 | 8.5 | Hard | County estimate |
| Alford | 82.0 | 4.8 | Moderately hard | County estimate |
| Manalapan | 32.7 | 1.9 | Soft | Utility-reported |
| Caryville | 31.5 | 1.8 | Soft | County estimate |
| Alva | 262.0 | 15.3 | Very hard | County estimate |
| Wausau | 31.5 | 1.8 | Soft | County estimate |
| Westville | 39.2 | 2.3 | Soft | County estimate |
| Pahokee | 153.0 | 8.9 | Hard | County estimate |
| South Bay | 153.0 | 8.9 | Hard | County estimate |
| Campbellton | 82.0 | 4.8 | Moderately hard | County estimate |
| Malabar | 258.6 | 15.1 | Very hard | County estimate |
| Osteen | 190.9 | 11.2 | Very hard | County estimate |
| Bokeelia | 262.0 | 15.3 | Very hard | County estimate |
| Wabasso | 182.8 | 10.7 | Very hard | County estimate |
| Brandon | 141.0 | 8.3 | Hard | County estimate |
| Lecanto | 170.0 | 9.9 | Hard | County estimate |
| Osprey | 263.0 | 15.4 | Very hard | County estimate |
| Inglis | 231.4 | 13.5 | Very hard | County estimate |
| Ochopee | 288.0 | 16.8 | Very hard | County estimate |
| Seville | 190.9 | 11.2 | Very hard | County estimate |
| Loxahatchee | 153.0 | 8.9 | Hard | County estimate |
| Mount Dora | 133.0 | 7.8 | Hard | County estimate |
| Eaton Park | 67.2 | 3.9 | Moderately hard | County estimate |
| Bradenton Beach | 145.0 | 8.5 | Hard | County estimate |
| Bay Pines | 152.5 | 8.9 | Hard | County estimate |
| Belleair Beach | 152.5 | 8.9 | Hard | County estimate |
| Christmas | 65.0 | 3.8 | Moderately hard | County estimate |
| Ellenton | 145.0 | 8.5 | Hard | County estimate |
| Gotha | 65.0 | 3.8 | Moderately hard | County estimate |
| Indian Rocks Beach | 152.5 | 8.9 | Hard | County estimate |
| Largo | 152.5 | 8.9 | Hard | County estimate |
| Mayo | 198.5 | 11.6 | Very hard | County estimate |
| Melrose | 182.6 | 10.7 | Very hard | County estimate |
| Nocatee | 167.0 | 9.8 | Hard | County estimate |
| Palm Beach | 153.0 | 8.9 | Hard | County estimate |
| Palm City | 182.4 | 10.7 | Very hard | County estimate |
| Seminole | 152.5 | 8.9 | Hard | County estimate |
| Shalimar | 11.8 | 0.7 | Soft | County estimate |
| Suwannee | 197.0 | 11.5 | Very hard | County estimate |
| Windermere | 65.0 | 3.8 | Moderately hard | County estimate |
Above 120 mg/L (7 gpg), scale is usually worth treating — see our water softener guide, or size a system with the hardness calculator & converter.
The Geology Behind Florida's Water Hardness
Florida sits in the Florida carbonate platform region.
Florida sits on a thick carbonate platform: the Floridan aquifer system, one of the most productive limestone and dolostone aquifers in the world, supplies most of the state's drinking water. Water moving through that carbonate rock dissolves calcium and magnesium continuously, so Florida groundwater is characteristically hard to very hard. Cities on treated surface water or with softening plants can run lower than their raw groundwater would suggest.
Source: USGS - Floridan aquifer system
Florida Water Hardness FAQ
Does Florida have hard water?
On the whole, no — Florida's statewide median sits below the hard threshold, though some cities run harder. The median is 86.8 mg/L (5.1 gpg) — moderately hard on the USGS scale, where anything above 120 mg/L (7 gpg) counts as hard. 24 of Florida's 84 measured cities fall in the hard or very hard bands (29%), so check your own city rather than the state average.
How hard is tap water in Florida?
Across the 84 Florida cities with measured values in our index, the median hardness is 86.8 mg/L (5.1 gpg) — moderately hard on the USGS scale. Individual cities range from 2.7 to 291.0 mg/L, so check your own city rather than assuming the state number.
Which city in Florida has the hardest water?
Apalachicola has the hardest measured tap water in our Florida index at 291.0 mg/L (17.0 gpg) — very hard on the USGS scale. Rankings use measured utility values only; labeled county estimates and values under active dispute are excluded.
Do I need a water softener in Florida?
24 of Florida's 84 measured cities (29%) fall in the hard or very hard bands — above 120 mg/L (7 gpg), the level where most water treatment professionals suggest considering an ion-exchange softener. Hardness varies utility to utility, so look up your own city's value before sizing equipment.
How do I find my city's exact water hardness?
Enter your ZIP code in our free lookup at tapwaterdata.com/zip to see the value we hold for your Florida city from utility-reported water quality data, check your water utility's annual Consumer Confidence Report (CCR), or use a home test-strip kit.
Need whole-house or professional water treatment?
For the problems a pitcher or under-sink filter cannot fix — scale, rust and black staining, sulfur smell, well contamination, or test results you cannot explain. Tell us what is happening and we will connect you with a local water-treatment professional.
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