How hard is the water in Florida?

The average water hardness across Florida is 165 PPM (9.6 GPG), classified as moderately hard. Hardness varies by city - the hardest higher-confidence city page is Duette (849 PPM) and the softest is Cantonment (3 PPM).

What city in Florida has the hardest water?

Duette has the hardest water among higher-confidence Florida city pages at 849 PPM. A water softener is recommended for residents.

How many water systems are in Florida?

Florida has 1,593 active community water systems serving 512 cities.

Water Hardness in Florida

Average: 165 PPMModerately Hard512 cities1,593 water systems

State data profile

How to read the Florida results

State pages are screening and comparison hubs. They summarize ZIP, city, and water-system patterns so you can find the local page that best matches your home or utility.

Direct or USGS-backed ZIPs

825 of 913

90% use treated-water records or USGS monitoring.

Estimated ZIP values

87 ZIPs

10% use nearby, county, or state-level fallback values.

Dataset update

March 9, 2026

Source coverage and rollups are rebuilt from the public dataset.

Use the source coverage below to judge how much local confirmation a specific city or ZIP needs. The methodology page explains the source hierarchy, weighting, and limitations.

State Average

165 PPM

Moderately Hard

Coverage

512 cities

1,593 water systems in the state rollup.

Data Source Coverage

ZIP-level source mix for Florida; higher direct and USGS coverage means less reliance on regional estimates.

913 ZIPs covered

Verified treated water

Utility, CCR, or state treated-water records

66%

601 ZIPs

High-confidence USGS

Environmental monitoring matched to local systems

25%

224 ZIPs

Estimated

Nearby, county, or state-level fallback values

10%

87 ZIPs

1 ZIPs have insufficient source data and are excluded from search sitemaps.

In Florida, 66% of ZIPs use verified treated-water records, 25% use high-confidence USGS monitoring, and 10% use estimates that should be confirmed locally for treatment decisions.

What the Data Shows in Florida

Hard water is common but not universal in Florida: 49% of classified ZIPs are hard or very hard.

Florida has unusually strong treated-water coverage: 66% of ZIPs use utility, CCR, or state treated-water records.

Use the city table below to compare local results. For estimated locations or unusually high readings, confirm with your utility or a home hardness test before sizing treatment equipment.

ZIP Hardness Distribution

Soft5% (44)

Slightly Hard13% (119)

Moderately Hard33% (305)

Hard38% (346)

Very Hard11% (98)

Treatment Takeaway

For many homes in Florida, hardness is high enough that scale buildup, fixture spotting, and appliance wear are realistic concerns. A local test is the best starting point before sizing a softener.

How to Use This Data

The source coverage is relatively strong in Florida, so these pages are useful for comparing local patterns before confirming your home's exact hardness.

Useful Florida City Pages

Shortcuts to city pages backed by more ZIP-code or water-system data.

Cities With More Local Data

Moderately Hard (129 PPM)

Saint Petersburg

19 ZIPs · 12 systems

Moderately Hard (178 PPM)

Estero

16 ZIPs · 19 systems

Very Hard (682 PPM)

Prioritize cities with multiple ZIPs and systems, then use source badges on each city page to separate verified treated-water records from estimates.

Top 10 Hardest Water Cities

#	City	Hardness
1	Duette	Very Hard (849 PPM)
2	Estero	Very Hard (682 PPM)
3	Clewiston	Very Hard (548 PPM)
4	Felda	Very Hard (536 PPM)
5	Fort Myers Beach	Very Hard (496 PPM)
6	Florida City	Very Hard (434 PPM)
7	Moore Haven	Very Hard (369 PPM)
8	Wauchula	Very Hard (346 PPM)
9	Hobe Sound	Very Hard (344 PPM)
10	Stuart	Very Hard (343 PPM)

Top 10 Softest Water Cities

#	City	Hardness
1	Cantonment	Soft (3 PPM)
2	Pensacola	Soft (3 PPM)
3	Walnut Hill	Soft (3 PPM)
4	Molino	Soft (4 PPM)
5	Century	Soft (4 PPM)
6	Milton	Soft (12 PPM)
7	Gulf Breeze	Soft (12 PPM)
8	Navarre	Soft (12 PPM)
9	Pace	Soft (12 PPM)
10	Jay	Soft (13 PPM)

All Cities in Florida

City pages marked Estimated use fallback values and should be confirmed with local testing or utility data.

AlfordModerately Hard AlomaModerately Hard Altamonte SpringModerately Hard AlthaModerately Hard AltoonaModerately Hard AlvaSlightly Hard Amelia IslandVery Hard Anna MariaSlightly Hard AnthonyModerately Hard ApalachicolaHard Apollo BeachHard ApopkaModerately Hard ArcherModerately Hard AripekaSlightly Hard AstatulaModerately Hard AstorModerately Hard Atlantic BeachVery Hard AuburndaleHard Avon ParkModerately Hard Azalea ParkModerately Hard Babson ParkHard BakerSoft Bal HarbourHard BaldwinVery Hard Barefoot BayModerately Hard BartowHard BascomModerately Hard BasingerVery Hard BellVery Hard Belle GladeHard BelleviewModerately Hard Beverly HillsSlightly Hard Big Pine KeyHard BlountstownModerately Hard Boca GrandeSlightly Hard Boca RatonHard BokeeliaSlightly Hard BonifayModerately Hard Boynton BeachHard Boys RanchHard Braden RiverSlightly Hard BradentonSlightly Hard Bradenton BeachSlightly Hard BradleyHard BrandonHard BranfordHard Briny BreezesHard BristolHard BronsonHard BrookerModerately Hard BrooksvilleHard BrycevilleVery Hard Buena Ventura LaModerately Hard BunnellModerately Hard BushnellHard CallahanVery Hard CampbelltonModerately Hard Canal PointHard CantonmentSoft Cape CanaveralModerately Hard Cape Coral CentrSlightly Hard CaptivaSlightly Hard Carl FisherHard Carol CityHard CarrabelleModerately Hard CarrollwoodHard CaryvilleModerately Hard CasselberryModerately Hard Cedar KeyModerately Hard Center HillHard CenturySoft ChattahoocheeSoft ChieflandHard ChipleyModerately Hard ChristmasModerately Hard ChuluotaModerately Hard CitraModerately Hard Citrus SpringsSlightly Hard City Of SunriseHard ClarksvilleModerately Hard ClearwaterModerately Hard ClermontModerately Hard ClewistonVery Hard CocoaModerately Hard Cocoa BeachModerately Hard ColemanHard College ParkwaySlightly Hard College PlazaSlightly Hard Coral GablesHard Coral SpringsHard CortezSlightly Hard CottondaleModerately Hard CrawfordvilleSoft Crescent BeachHard Crescent CityModerately Hard CrestviewSoft Cross CityVery Hard Crystal BeachModerately Hard Crystal RiverSlightly Hard CypressModerately Hard Cypress GardensHard DaniaHard DavenportModerately Hard DavieHard DayModerately Hard Daytona BeachModerately Hard De Funiak SpringHard De Leon SpringsModerately Hard DebaryModerately Hard Deerfield BeachHard DelandModerately Hard Delray BeachHard DeltonaModerately Hard Dona VistaModerately Hard DoralHard DoverHard DuetteVery Hard DundeeModerately Hard DunedinModerately Hard DunlawtonModerately Hard DunnellonModerately Hard Eagle LakeHard East PalatkaModerately Hard EatonvilleModerately Hard Eau GallieModerately Hard EbroSoft EdgewaterModerately Hard Eglin A F BSoft ElktonVery Hard EllentonSlightly Hard EloiseHard EnglewoodHard EsteroVery Hard EustisModerately Hard FairvillaModerately Hard FeldaVery Hard FellsmereVery Hard Fern ParkModerately Hard Flagler BeachModerately Hard FlorahomeSlightly Hard Floral CitySlightly Hard Florida CityVery Hard Forest CityModerately Hard Forest LakesHard Fort LauderdaleHard Fort MeadeHard Fort MyersSlightly Hard Fort Myers BeachVery Hard Fort PierceHard Fort Walton BeacSoft Fort WhiteHard FountainSlightly Hard FreeportHard FrostproofHard Fruitland ParkModerately Hard GainesvilleModerately Hard GenevaModerately Hard GeorgetownSlightly Hard GibsontonHard Glen RidgeHard Glen Saint MaryModerately Hard GothaModerately Hard GracevilleModerately Hard Grand IslandModerately Hard Grand RidgeModerately Hard GrantModerately Hard Green Cove SprinHard GreenacresHard GreensboroSoft GreenvilleHard GreenwoodModerately Hard GrenelefeModerately Hard GretnaSoft Grove CitySlightly Hard GrovelandModerately Hard Gulf BreezeSoft Gulf HammockHard Haines CreekModerately Hard HallandaleHard HamptonModerately Hard HastingsVery Hard HavanaSlightly Hard HaverhillHard HawthorneSlightly Hard HeathrowModerately Hard HernandoSlightly Hard HialeahHard High SpringsModerately Hard Highland BeachHard HilliardVery Hard Hobe SoundVery Hard HolidaySlightly Hard HollisterSlightly Hard Holly HillModerately Hard HollywoodHard HoltSoft HomelandHard HomesteadHard HomosassaSlightly Hard Horseshoe BeachVery Hard HosfordModerately Hard Howey In The HilModerately Hard HudsonSlightly Hard Hunt ClubModerately Hard Hurlburt FieldSoft IndialanticModerately Hard Indian Harbor BeModerately Hard Indian River ShoVery Hard IndiantownVery Hard InglisModerately Hard Intercession CitModerately Hard InterlachenSlightly Hard InvernessSlightly Hard IslamoradaHard JacksonvilleVery Hard Jacksonville BeaVery Hard Jacksonville N AVery Hard JasperModerately Hard JaySoft JenningsModerately Hard Jensen BeachVery Hard JupiterHard KathleenHard KenansvilleModerately Hard KendallHard Kenneth CityModerately Hard Key BiscayneHard Keystone HeightsHard KinardModerately Hard KissimmeeModerately Hard La CrosseModerately Hard LabelleVery Hard Lady LakeModerately Hard Lake AlfredHard Lake ButlerModerately Hard Lake CityHard Lake ComoSlightly Hard Lake HamiltonHard Lake HelenModerately Hard Lake PanasoffkeeHard Lake ParkHard Lake PlacidModerately Hard Lake TarponModerately Hard Lake WalesHard Lake WorthHard LakelandHard LamontModerately Hard Lanark VillageModerately Hard Land O LakesSlightly Hard LantanaHard LargoModerately Hard Laurel HillSoft LawteyModerately Hard LecantoSlightly Hard LeeModerately Hard LeesburgModerately Hard Lehigh AcresSlightly Hard Lighthouse PointHard LithiaHard LloydModerately Hard LockhartModerately Hard Long KeyHard LongwoodModerately Hard LoridaModerately Hard LoxahatcheeHard LuluHard LutzHard Lynn HavenSlightly Hard MacclennySoft Madeira BeachModerately Hard MadisonHard MalabarModerately Hard MaloneModerately Hard MarathonHard MargateHard MariannaModerately Hard Mary EstherSoft MascotteModerately Hard MayoHard Mc AlpinHard Mc IntoshModerately Hard Meadows VillageHard MelbourneModerately Hard Melbourne BeachModerately Hard Melbourne VillagModerately Hard MelroseSlightly Hard Merritt IslandModerately Hard Mexico BeachSlightly Hard MiamiHard Miami BeachHard Miami ShoresHard Miami SpringsHard MicanopyModerately Hard Mid VeniceHard MiddleburgHard MidwaySoft MiltonSoft MimsModerately Hard MiramarHard MolinoSoft MonticelloHard MontverdeModerately Hard Moore HavenVery Hard MorristonVery Hard Mount DoraModerately Hard MulberryHard Myakka CitySlightly Hard Naval Air StatioVery Hard NavarreSoft Neptune BeachVery Hard New Port RicheySlightly Hard New Smyrna BeachModerately Hard NewberryModerately Hard NicevilleSoft NobletonHard NokomisHard North Bay VillagHard North Coral SpriHard North MiamiHard North Miami BeacHard North Palm BeachHard North PortHard O BrienHard Oak HillModerately Hard OaklandModerately Hard Oakland ParkHard OcalaModerately Hard Ocean ReefHard OcklawahaModerately Hard OcoeeModerately Hard OdessaHard OjusHard OkahumpkaModerately Hard OkeechobeeVery Hard Old TownVery Hard OldsmarModerately Hard OlusteeVery Hard Olympia HeightsHard OnaHard Opa LockaHard Orange CityModerately Hard Orange LakeModerately Hard Orange ParkHard Orange SpringsModerately Hard OrlandoModerately Hard Orlo VistaModerately Hard Ormond BeachModerately Hard OspreyHard OsteenModerately Hard Otter CreekModerately Hard OviedoModerately Hard OxfordHard PaceSoft PahokeeHard PaisleyModerately Hard PalatkaSlightly Hard Palm BayModerately Hard Palm BeachHard Palm Beach GardeHard Palm CityVery Hard Palm CoastModerately Hard Palm HarborModerately Hard Palma SolaSlightly Hard PalmdaleHard PalmettoSlightly Hard PanaceaSoft Panama CitySlightly Hard Panama City BeacSlightly Hard ParrishSlightly Hard Patrick A F BModerately Hard Pembroke PinesHard Penney FarmsHard PensacolaSoft PerrineHard PerryHard PiersonModerately Hard Pine CastleModerately Hard Pine HillsModerately Hard PinettaModerately Hard PlacidaSlightly Hard Plant CityHard PlantationHard PoincianaHard Polk CityModerately Hard Pomona ParkModerately Hard Pompano BeachHard Ponce De LeonHard Ponte Vedra BeacVery Hard Port CharlotteSlightly Hard Port OrangeModerately Hard Port RicheySlightly Hard Port Saint JoeSlightly Hard Port Saint JohnModerately Hard Port Saint LucieHard PrincetonHard Punta GordaModerately Hard Quail HeightsHard QuincySlightly Hard RaifordModerately Hard ReddickModerately Hard Ridge ManorSlightly Hard Ridge Manor EstaHard Ridge Manor WestModerately Hard RiverviewHard Riviera BeachHard RockledgeModerately Hard Royal Palm BeachHard RuskinHard Safety HarborModerately Hard Saint AugustineVery Hard Saint CloudModerately Hard Saint George IslHard Saint James CitySlightly Hard Saint MarksSoft Saint PetersburgModerately Hard SalemModerately Hard Salt SpringsModerately Hard San AntonioSlightly Hard San MateoSlightly Hard Sand LakeModerately Hard SandersonModerately Hard SandestinSoft SanfordModerately Hard SanibelSlightly Hard Santa FeModerately Hard Santa Rosa BeachHard SarasotaHard Sarasota SquareHard SatsumaSlightly Hard ScottsmoorModerately Hard SebastianVery Hard SebringModerately Hard SeffnerHard SevilleModerately Hard Shady HillsSlightly Hard ShalimarSoft Silver SpringsModerately Hard SneadsModerately Hard SopchoppySoft SorrentoModerately Hard South BayHard South MiamiHard South TrailHard South VeniceHard SouthportSlightly Hard SouthsideHard Spring HillHard Springs PlazaModerately Hard StarkeModerately Hard SteinhatcheeHard StuartVery Hard SummerfieldModerately Hard SumtervilleHard Sun City CenterHard SunriseHard SuwanneeModerately Hard TallahasseeModerately Hard TamaracHard TampaHard Tarpon SpringsModerately Hard TavaresModerately Hard TavernierHard TelogiaModerately Hard TequestaHard Terra CeiaSlightly Hard ThonotosassaHard TiceSlightly Hard Tierra VerdeModerately Hard TitusvilleModerately Hard TrentonHard Union ParkModerately Hard ValparaisoSoft ValricoHard VeniceHard VenturaModerately Hard VenusModerately Hard VernonModerately Hard Vero BeachVery Hard Village Of GolfHard WabassoVery Hard WacissaModerately Hard WaldoModerately Hard Walnut HillSoft WauchulaVery Hard WausauModerately Hard WaverlyHard WeirsdaleModerately Hard WelakaSlightly Hard WellbornHard Wesley ChapelSlightly Hard West Palm BeachHard WestgateSlightly Hard WestvilleSlightly Hard WewahitchkaModerately Hard White SpringsModerately Hard Whitney BeachHard WildwoodHard WillistonHard WimaumaHard WindermereModerately Hard Winter GardenModerately Hard Winter HavenHard Winter ParkModerately Hard Winter SpringsModerately Hard Worthington SpriVery Hard YalahaModerately Hard YankeetownModerately Hard YoungstownSlightly Hard YuleeVery Hard ZellwoodModerately Hard ZephyrhillsSlightly Hard Zolfo SpringsModerately Hard