Water Hardness in Arkansas
Average: 94 PPMSlightly Hard557 cities665 water systems
State report
Is Arkansas Water Hard or Soft?
Arkansas water is slightly hard on average at 94 PPM (5.5 GPG). Local readings can vary by utility, aquifer, treatment plant, and private well use.
State average
94 PPM
Slightly Hard
Local coverage
557 cities
665 water systems
Source profile
429 ZIPs
direct or USGS-backed
Arkansas has mixed source coverage across treated-water records, USGS monitoring, and estimated fallback values.
State data profile
How to read the Arkansas 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
429 of 582
74% use treated-water records or USGS monitoring.
Estimated ZIP values
153 ZIPs
26% 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
94 PPM
Slightly Hard
Coverage
557 cities
665 water systems in the state rollup.
Data Source Coverage
ZIP-level source mix for Arkansas; higher direct and USGS coverage means less reliance on regional estimates.
582 ZIPs covered
Verified treated water
Utility, CCR, or state treated-water records
35%
204 ZIPs
High-confidence USGS
Environmental monitoring matched to local systems
39%
225 ZIPs
Estimated
Nearby, county, or state-level fallback values
26%
153 ZIPs
In Arkansas, 35% of ZIPs use verified treated-water records, 39% use high-confidence USGS monitoring, and 26% use estimates that should be confirmed locally for treatment decisions.
What the Data Shows in Arkansas
Most classified ZIPs in Arkansas are below the hard-water threshold, though local systems can still vary.
Arkansas uses a mixed data profile across treated-water records, USGS monitoring, and estimated fallback values.
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
Soft68% (395)
Slightly Hard7% (42)
Moderately Hard4% (24)
Hard9% (54)
Very Hard12% (67)
Treatment Takeaway
Hardness treatment is less likely to be needed statewide, but local water systems can still differ from the state pattern. Test first if you see scale or spotting.
How to Use This Data
Use the source coverage above to decide how much local confirmation you need for a specific city or ZIP code.
Source-Backed Water Systems in Arkansas
Large systems with treated-water reports or USGS monitoring behind the state rollup.
| Water system | Hardness | Source label | Population |
|---|---|---|---|
| Central Arkansas Water AR0000465 - Pulaski County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 368,455 |
| Fayetteville Waterworks AR0000569 - Washington County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 116,398 |
| Springdale Water Utilities AR0000575 - Benton County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 98,948 |
| Fort Smith Water Utilities AR0000507 - Sebastian County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 86,209 |
| Rogers Water Utilities AR0000055 - Benton County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 81,443 |
| Jonesboro Water System AR0000124 - Greene County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 79,889 |
| Conway Water System AR0000189 - Faulkner County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 64,008 |
| Bentonville Water Utilities AR0000041 - Benton County | 30 PPM Soft | Annual Water Quality Report Verified - Annual Water Quality Report | 51,250 |
Useful Arkansas City Pages
Shortcuts to city pages backed by more ZIP-code or water-system data.
Cities With More Local Data
Prioritize cities with multiple ZIPs and systems, then use the local source badges to compare high-confidence USGS readings against estimated areas.
Top 10 Hardest Water Cities
| # | City | Hardness |
|---|---|---|
| 1 | Alma | Very Hard (379 PPM) |
| 2 | Mountain Home | Very Hard (321 PPM) |
| 3 | Harrison | Hard (195 PPM) |
| 4 | Lead Hill | Hard (193 PPM) |
| 5 | Crawfordsville | Hard (189 PPM) |
| 6 | Dermott | Hard (182 PPM) |
| 7 | Eureka Springs | Slightly Hard (92 PPM) |
| 8 | Osceola | Slightly Hard (78 PPM) |
| 9 | Humnoke | Slightly Hard (67 PPM) |
| 10 | Cabot | Soft (58 PPM) |
All Cities in Arkansas
City pages marked Estimated use fallback values and should be confirmed with local testing or utility data.
AdonaSoftAgnosHardAlexanderSoftAliciaSoftAlleeneSlightly HardAlmaVery HardAlmyraVery HardAlpenaModerately HardAltheimerSoftAltusSoftAmagonSoftAmitySoftAntoineSoftArkadelphiaSoftArkansas CityVery HardAshdownSlightly HardAtkinsSoftAubreySoftAugustaHardAustinSlightly HardBald KnobSoftBanksSlightly HardBarlingSoftBatesvilleHardBauxiteSoftBaySoftBeardenSoftBee BranchSoftBeebeSoftBeech GroveSoftBeedevilleVery HardBella VistaSoftBellevilleSoftBen LomondSoftBentonSoftBentonvilleSoftBerryvilleSlightly HardBethel HeightsSoftBexarSoftBig FlatVery HardBigelowSoftBiggersVery HardBiscoeVery HardBismarckSoftBlack OakSoftBlack RockVery HardBlevinsSoftBlue MountainSoftBluff CitySlightly HardBlufftonSoftBlytheville A FSoftBolesSoftBonnerdaleSoftBonoSoftBoonevilleSoftBradfordSoftBradleySoftBranchModerately HardBrickeysSoftBriggsvilleSoftBrinkleySlightly HardBrockwellSoftBrooklandSoftBryantSoftBucknerSlightly HardBuckvilleSoftBull ShoalsVery HardByronHardCabotSoftCaddo GapSoftCalamineVery HardCaldwellSlightly HardCalionSoftCampSoftCamp Joseph T RoSoftCanehillSoftCarawaySoftCarlisleSlightly HardCarthageSoftCasaSoftCashSoftCasscoeVery HardCave CityHardCave SpringsSoftCecilSoftCedarvilleVery HardCenter RidgeSoftCentertonSoftCentervilleSoftCentral CitySoftCharlestonModerately HardCharlotteHardCherokee VillageVery HardCherry ValleyHardChesterVery HardClarendonSlightly HardClarkridgeVery HardClarksvilleSoftClevelandSoftClintonSoftCoal HillSoftCollege CityVery HardCollege StationSoftColtSoftCombsSoftComptonSoftConcordSoftConwaySoftCordHardCorningSoftCotterVery HardCotton PlantSlightly HardCoveSoftCrawfordsvilleHardCrocketts BluffVery HardCrumrodSoftCushmanHardDanvilleSoftDardanelleSoftDattoSoftDe QueenSoftDe Valls BluffVery HardDe WittVery HardDecaturSoftDeerSoftDelaplaineSoftDelawareSoftDelightSoftDellSoftDennardSoftDermottHardDes ArcModerately HardDeshaHardDiamond CityHardDierksSoftDoddridgeHardDogpatchSoftDollarwaySoftDolphSoftDonaldsonSoftDoverSoftDrascoSoftDriverSoftDumasModerately HardDyerVery HardDyessSoftEarleHardEast CamdenSoftEdgemontSoftEdmondsonHardEgyptSoftEl DoradoSoftEl PasoSoftElaineModerately HardElizabethSoftElkinsSoftEmersonSoftEmmetSoftEnglandSlightly HardEnolaSoftEthelVery HardEtowahSoftEudoraVery HardEureka SpringsSlightly HardEvansvilleSoftEvening ShadeHardEvertonHardFairfield BaySoftFarmingtonSoftFayettevilleSoftFifty SixModerately HardFisherSoftFlippinVery HardFloralHardFordyceSlightly HardForemanSoftForrest CitySoftFort SmithSoftFoukeHardFountain HillModerately HardFoxModerately HardFranklinHardFrenchmans BayouSoftFultonSoftGamalielVery HardGarfieldSoftGarland CityHardGassvilleVery HardGentrySoftGeorgetownSoftGeppSoftGillettVery HardGillhamSoftGilmoreHardGlencoeSoftGlenwoodSoftGoodwinSoftGouldSoftGrannisSoftGrapevineSoftGravel RidgeSoftGravellySoftGravetteSoftGreen ForestSlightly HardGreenbrierSoftGreenwaySoftGreenwoodSoftGreers FerrySoftGriffithvilleSoftGrubbsVery HardGuionSoftGurdonSoftGuySoftHackettSoftHagarvilleSoftHamburgModerately HardHamptonSoftHanoverModerately HardHardyVery HardHarrellSoftHarrietSoftHarrisburgSoftHarrisonHardHartfordSoftHartmanSoftHarveySoftHastySoftHatfieldSoftHattievilleSoftHaynesSoftHazenVery HardHeber SpringsSoftHectorSoftHelenaSlightly HardHendersonVery HardHensleySoftHethSoftHickory RidgeVery HardHigginsonSoftHindsvilleSoftHiwasseSoftHolly GroveSlightly HardHoratioSoftHorseshoe BendHardHot Springs VillSoftHoustonSoftHoxieVery HardHughesSoftHumnokeSlightly HardHumphreyVery HardHunterSoftHuntingtonSoftHuntsvilleSoftHuttigSoftImbodenVery HardIngallsModerately HardJacksonportSlightly HardJacksonvilleSoftJasperSoftJeffersonSoftJerseySlightly HardJerusalemSoftJessievilleSoftJoinerSoftJonesboroSoftJordanModerately HardJudsoniaSoftJunction CitySoftKeiserSoftKensettSoftKeoSlightly HardKingslandSlightly HardKingstonSoftKirbySoftKnobelSoftKnoxvilleSoftLafeSoftLake CatherineSoftLake CitySoftLake HamiltonSoftLake VillageSoftLakeviewVery HardLamarSoftLambrookSoftLangleySoftLeachvilleSoftLead HillHardLeolaSoftLepantoSoftLeslieModerately HardLetonaSoftLewisvilleSoftLexaSoftLincolnSoftLittle RockSoftLockesburgSoftLocust GroveHardLondonSoftLonokeSlightly HardLonsdaleSoftLouannSoftLowellSoftLuxoraSoftLynnVery HardMadisonSoftMagazineModerately HardMagnessHardMagnoliaSoftMalvernSoftMammoth SpringVery HardManningSoftMansfieldSoftMarcellaModerately HardMariannaSlightly HardMarionHardMarked TreeSoftMarmadukeSoftMarshallSoftMarvellSlightly HardMaumelleSoftMayflowerSoftMaynardVery HardMaysvilleSoftMc CaskillSoftMc CroryHardMc DougalSoftMc GeheeVery HardMc NeilSoftMc RaeSoftMellwoodSoftMenaSoftMenifeeSoftMidlandSoftMidwayVery HardMineral SpringsSoftMinturnSoftMonetteSoftMonroeSoftMonticelloSoftMontroseVery HardMoroSlightly HardMorriltonSoftMorrowSoftMoscowSoftMount HollySoftMount IdaSoftMount JudeaSoftMount PleasantHardMount VernonSoftMountain HomeVery HardMountainburgVery HardMulberryVery HardMurfreesboroSoftNashvilleSoftNatural DamVery HardNew BlaineSoftNew EdinburgSlightly HardNewarkHardNewhopeSoftNewnataModerately HardNewportSlightly HardNorforkVery HardNormanSoftNorphletSoftNorthSoftNorth CedarSoftNorth Little RocSoftO KeanSoftOak GroveSlightly HardOaklandHardOarkSoftOdenSoftOgdenHardOil TroughHardOkolonaSoftOlaSoftOmahaHardOneidaSoftOniaModerately HardOsceolaSlightly HardOxfordModerately HardOzanSoftOzarkSlightly HardOzoneSoftPalestineSoftPangburnSoftParagouldSoftParisSoftParkdaleSoftParkinSoftParksSoftParonSoftParthenonSoftPattersonHardPaynewaySoftPea RidgeSoftPeach OrchardSoftPearcySoftPeelSoftPelsorSoftPencil BluffSoftPerrySoftPerrytownSoftPerryvilleSoftPettigrewSoftPiggottSoftPindallSoftPine BluffSoftPinevilleSoftPlainviewSoftPleasant GroveModerately HardPleasant PlainsHardPlumervilleSoftPocahontasVery HardPollardSoftPoplar GroveSlightly HardPortiaVery HardPortlandVery HardPottsvilleSoftPoughkeepsieSoftPowhatanSoftPoyenSoftPrairie GroveSoftPrattsvilleSoftPrescottSoftPrimSoftProctorHardPyattHardQuitmanSoftRatcliffModerately HardRavendenVery HardRavenden SpringsVery HardReaderSoftRectorSoftRedfieldSoftReedModerately HardReydellSoftReynoVery HardRisonSoftRivervaleSoftRoeSoftRogersSoftRohwerVery HardRolandSoftRomanceSoftRose BudSoftRoselandSoftRosieHardRosstonSoftRoverSoftRoyalSoftRudyVery HardRussellSoftRussellvilleSoftSaffellSoftSageSoftSaint CharlesVery HardSaint FrancisSoftSaint JoeHardSaint PaulSoftSaratogaSlightly HardScotlandSoftScottSlightly HardScrantonSoftShannon HillsSoftSheridanSoftSherrillSoftSherwoodSoftShirleySoftSidneyHardSiloam SpringsSoftSimsSoftSmackoverSoftSmithvilleSoftSnow LakeSoftSolgohachiaSoftSpringdaleSoftSpringfieldSoftStampsSlightly HardStar CitySoftState UniversitySoftStephensSoftStorySoftStrongSoftSturkieSoftStuttgartVery HardSubiacoSoftSuccessSoftSulphur RockHardSulphur SpringsSoftSummersSoftSummitHardSwiftonVery HardTamoVery HardTaylorSoftThidaHardThorntonSlightly HardTichnorVery HardTillySoftTraskwoodSoftTuckerSoftTuckermanSlightly HardTumbling ShoalsSoftTupeloSoftTurnerSoftTurrellHardTwin GrovesSoftTyronzaSoftUlmVery HardUmpireSoftUniontownVery HardValley SpringsHardVan BurenVery HardVandervoortSoftVanndaleSoftVendorHardViloniaSoftViolaHardViolet HillSoftWabashSoftWabbasekaSoftWaldoSoftWaldronSoftWardSlightly HardWarm SpringsSoftWarrenSoftWashingtonSoftWatsonVery HardWavelandSoftWeinerSoftWesleySoftWest ForkSoftWest HelenaSoftWest MemphisHardWestern GroveHardWheatleySoftWickesSoftWidemanSoftWidenerSlightly HardWilburnSoftWillifordVery HardWilmarSoftWilmotVery HardWilsonSoftWiltonSlightly HardWinchesterModerately HardWinslowSoftWinthropSoftWisemanSoftWitterSoftWitts SpringsSoftWoodsonSoftWoosterSoftWrightsvilleSoftWynneVery HardYellvilleHardZionModerately Hard