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Water Hardness in Missouri

Average: 219 PPMHard903 cities1,431 water systems
State data profile

How to read the Missouri 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
757 of 997
76% use treated-water records or USGS monitoring.
Estimated ZIP values
240 ZIPs
24% 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
219 PPM
Hard
Coverage
903 cities
1,431 water systems in the state rollup.

Data Source Coverage

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

997 ZIPs covered
Verified treated water
Utility, CCR, or state treated-water records
35%
346 ZIPs
High-confidence USGS
Environmental monitoring matched to local systems
41%
411 ZIPs
Estimated
Nearby, county, or state-level fallback values
24%
240 ZIPs

In Missouri, 35% of ZIPs use verified treated-water records, 41% use high-confidence USGS monitoring, and 24% use estimates that should be confirmed locally for treatment decisions.

What the Data Shows in Missouri

Hard water is common but not universal in Missouri: 59% of classified ZIPs are hard or very hard.

Missouri 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

Soft0% (4)
Slightly Hard4% (39)
Moderately Hard37% (368)
Hard22% (215)
Very Hard37% (371)

Treatment Takeaway

For many homes in Missouri, 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 Missouri, so these pages are useful for comparing local patterns before confirming your home's exact hardness.

Useful Missouri City Pages

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

Cities With More Local Data

Kansas City
41 ZIPs · 20 systems
Very Hard (260 PPM)
Saint Louis
19 ZIPs · 7 systems
Moderately Hard (120 PPM)
Springfield
7 ZIPs · 13 systems
Moderately Hard (120 PPM)
Independence
7 ZIPs · 11 systems
Very Hard (260 PPM)
Saint Joseph
6 ZIPs · 3 systems
Hard (200 PPM)
Lees Summit
4 ZIPs · 12 systems
Very Hard (260 PPM)

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

#CityHardness
1BelgradeVery Hard (746 PPM)
2CentervilleVery Hard (746 PPM)
3ViburnumVery Hard (746 PPM)
4BlackwellVery Hard (668 PPM)
5Doe RunVery Hard (668 PPM)
6French VillageVery Hard (668 PPM)
7GatewoodVery Hard (668 PPM)
8LeadwoodVery Hard (668 PPM)
9Middle BrookVery Hard (668 PPM)
10Valles MinesVery Hard (668 PPM)

Top 10 Softest Water Cities

#CityHardness
1LiberalSoft (35 PPM)
2MindenminesSoft (35 PPM)
3BernieSoft (39 PPM)
4GideonSoft (39 PPM)
5AnnapolisSlightly Hard (69 PPM)
6Iron MountainSlightly Hard (69 PPM)
7LestervilleSlightly Hard (69 PPM)
8AdvanceSlightly Hard (83 PPM)
9BloomfieldSlightly Hard (83 PPM)
10CubaSlightly Hard (98 PPM)

All Cities in Missouri

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

AdrianHardAdvanceSlightly HardAfftonModerately HardAgencyHardAlbaHardAlbanySlightly HardAldrichHardAlexandriaModerately HardAlmaModerately HardAltamontSlightly HardAmazoniaHardAmityHardAmoretHardAmsterdamHardAnabelVery HardAndersonModerately HardAnnadaModerately HardAnnapolisSlightly HardAnnistonHardAntoniaVery HardAppleton CityModerately HardArbelaModerately HardArbyrdHardArcadiaSlightly HardArchieVery HardArcolaHardArgyleVery HardArmstrongModerately HardArnoldVery HardArrow RockModerately HardAsburyHardAsh GroveModerately HardAshburnModerately HardAshlandModerately HardAtlantaVery HardAugustaModerately HardAuxvasseVery HardAvaHardAvillaHardBakersfieldHardBallwinModerately HardBaringModerately HardBarnardHardBarnettVery HardBarnhartVery HardBates CityVery HardBayVery HardBeaufortModerately HardBelgradeVery HardBell CitySlightly HardBelleVery HardBelleviewModerately HardBellflowerVery HardBeltonVery HardBentonSlightly HardBenton CityVery HardBergerModerately HardBerkeleyModerately HardBernieSoftBerrymanModerately HardBertrandVery HardBethanyModerately HardBethelModerately HardBeulahVery HardBevierVery HardBigelowVery HardBillingsModerately HardBirch TreeVery HardBixbyModerately HardBlackModerately HardBlackburnModerately HardBlackwaterModerately HardBlackwellVery HardBlairstownHardBlandVery HardBlodgettSlightly HardBloomfieldSlightly HardBloomsdaleVery HardBlue EyeModerately HardBlue SpringsVery HardBlythedaleHardBogardHardBois D ArcModerately HardBolckowHardBolivarHardBonne TerreVery HardBonnots MillVery HardBoonvilleVery HardBossModerately HardBosworthHardBourbonModerately HardBowling GreenModerately HardBradleyvilleModerately HardBragg CityHardBraggadocioHardBranson WestModerately HardBrashearModerately HardBraymerVery HardBreckenridgeSlightly HardBrentwoodModerately HardBridgetonModerately HardBrightonHardBrinktownVery HardBrixeyModerately HardBronaughVery HardBrookfieldHardBrookline StatioModerately HardBroseleyModerately HardBrowningModerately HardBrownwoodHardBrumleyModerately HardBrunerModerately HardBrunswickModerately HardBucklinModerately HardBucknerVery HardBucyrusModerately HardBuffaloHardBuncetonVery HardBunkerHardBurfordvilleVery HardBurlington JunctHardButlerModerately HardButterfieldModerately HardCaboolHardCadetModerately HardCainsvilleModerately HardCairoVery HardCaledoniaHardCalhounHardCaliforniaVery HardCallaoVery HardCamdenHardCamden PointVery HardCamdentonVery HardCameronVery HardCampbellModerately HardCanalouHardCantonHardCape FairModerately HardCape GirardeauVery HardCardwellHardCarl JunctionVery HardCarrolltonHardCartervilleHardCarthageHardCaruthersvilleModerately HardCassvilleModerately HardCatawissaModerately HardCatronHardCaulfieldHardCedar HillVery HardCedarcreekModerately HardCenterModerately HardCentertownModerately HardCenterviewVery HardCentervilleVery HardCentraliaModerately HardChadwickModerately HardChaffeeModerately HardChamoisVery HardCharlestonVery HardCherryvilleModerately HardChesterfieldModerately HardChestnutridgeModerately HardChilhoweeVery HardChillicotheSlightly HardChulaSlightly HardClarenceVery HardClarkVery HardClarksburgVery HardClarksdaleHardClarksvilleVery HardClarktonHardClaytonModerately HardClearmontHardClevelandVery HardCleverModerately HardClifton HillVery HardClimax SpringsVery HardClubbModerately HardClydeHardCoatsvilleModerately HardCoffeySlightly HardCole CampVery HardCollinsVery HardColumbiaModerately HardCommerceSlightly HardConceptionHardConception JunctHardConcordiaModerately HardConwayHardCook StationModerately HardCooterHardCorderVery HardCosbyHardCouchVery HardCowgillVery HardCraneHardCreightonVery HardCrescentModerately HardCreve CoeurModerately HardCrockerVery HardCross TimbersVery HardCrystal CityVery HardCubaSlightly HardCurryvilleVery HardDadevilleHardDaisyVery HardDaltonModerately HardDarlingtonVery HardDavisvilleModerately HardDawnSlightly HardDe KalbHardDe SotoVery HardDe WittVery HardDearbornVery HardDeepwaterHardDeerfieldVery HardDefianceModerately HardDenverVery HardDes ArcModerately HardDes PeresModerately HardDeslogeVery HardDevils ElbowVery HardDexterHardDiamondModerately HardDittmerVery HardDixonVery HardDoe RunVery HardDoraModerately HardDoverVery HardDowningModerately HardDrexelVery HardDruryModerately HardDudleyVery HardDuenwegHardDukeVery HardDunneganHardDurhamModerately HardEagle RockModerately HardEaglevilleSlightly HardEast LynneVery HardEast PrairieHardEastonHardEdgar SpringsVery HardEdgertonVery HardEdinaModerately HardEdwardsModerately HardEl Dorado SpringModerately HardEldonVery HardEldridgeHardElk CreekModerately HardElklandModerately HardEllingtonHardEllsinoreHardElmerVery HardElmoHardElsberryVery HardEmdenModerately HardEminenceVery HardEmmaModerately HardEoliaModerately HardEssexHardEthelVery HardEugeneModerately HardEuniceModerately HardEvertonModerately HardEwingModerately HardExcelloVery HardExcelsior SpringVery HardExeterModerately HardFair GroveModerately HardFair PlayHardFairdealingHardFairfaxHardFairviewModerately HardFalconHardFarberVery HardFarmingtonVery HardFaucettHardFayetteVery HardFentonModerately HardFergusonModerately HardFerrelviewVery HardFestusVery HardFillmoreHardFiskSlightly HardFlemingtonVery HardFletcherModerately HardFlorenceVery HardFlorissantModerately HardFoleyVery HardFordlandHardForest CityModerately HardForistellModerately HardForsythModerately HardFort Leonard WooVery HardFortunaVery HardFosterModerately HardFour SeasonsVery HardFrankfordVery HardFranklinVery HardFreeburgVery HardFreemanVery HardFremontHardFrench VillageVery HardFriedheimVery HardFrohnaVery HardFultonVery HardGainesvilleHardGalenaModerately HardGallatinSlightly HardGaltHardGarden CityVery HardGarrisonModerately HardGatewoodVery HardGentryHardGeraldModerately HardGibbsModerately HardGibsonHardGideonSoftGilliamModerately HardGilman CityHardGipsyModerately HardGladstoneVery HardGlasgowVery HardGlenallenModerately HardGlencoeModerately HardGlenwoodModerately HardGoblerHardGoldenModerately HardGolden CityHardGoodmanModerately HardGorinModerately HardGowerVery HardGraffModerately HardGrahamHardGrain ValleyVery HardGranbyModerately HardGrand PassModerately HardGrandinHardGrandviewVery HardGrant CityHardGravois MillsVery HardGray SummitModerately HardGrayridgeHardGreen CastleModerately HardGreen CityModerately HardGreen RidgeVery HardGreenfieldHardGreentopModerately HardGreenvilleVery HardGroverModerately HardGrovespringHardGrubvilleModerately HardGuilfordHardHaleHardHalf WayHardHallsvilleModerately HardHalltownVery HardHamiltonHardHannibalVery HardHardinVery HardHarrisVery HardHarrisburgModerately HardHarrisonvilleVery HardHartsburgModerately HardHartshornVery HardHartvilleHardHarviellSlightly HardHarwoodVery HardHatfieldVery HardHawk PointVery HardHayti HeightsModerately HardHazelwoodModerately HardHelenaHardHempleHardHenleyModerately HardHenriettaHardHerculaneumVery HardHermitageVery HardHigbeeVery HardHigginsvilleHardHigh HillVery HardHigh RidgeVery HardHighlandvilleModerately HardHillsboroVery HardHolcombHardHoldenVery HardHollandModerately HardHollidayModerately HardHollisterHardHoltVery HardHolts SummitVery HardHomestownModerately HardHopkinsHardHornersvilleHardHouse SpringsVery HardHoustonHardHoustoniaVery HardHugginsModerately HardHughesvilleVery HardHumansvilleHardHumphreysVery HardHunnewellModerately HardHuntsvilleVery HardHurdlandModerately HardHurleyHardIanthaModerately HardIberiaVery HardIndependenceVery HardIoniaVery HardIron MountainSlightly HardIrondaleHardIsabellaModerately HardJacksonVery HardJacksonvilleVery HardJadwinVery HardJamesonSlightly HardJamesportSlightly HardJamestownVery HardJaneModerately HardJasperHardJefferson CityModerately HardJenkinsHardJenningsModerately HardJerico SpringsModerately HardJeromeVery HardJonesburgVery HardJoplinHardKahokaModerately HardKaiserModerately HardKansas CityVery HardKearneyVery HardKelsoSlightly HardKennettHardKewaneeHardKeytesvilleModerately HardKidderHardKimberling CityModerately HardKing CityVery HardKingdom CityVery HardKingstonVery HardKingsvilleVery HardKirbyvilleModerately HardKirksvilleModerately HardKirkwoodModerately HardKissee MillsModerately HardKnob NosterVery HardKnox CityModerately HardKoeltztownModerately HardKoshkonongHardLa BelleModerately HardLa GrangeHardLa MonteVery HardLa PlataVery HardLa RussellModerately HardLabadieModerately HardLacledeHardLaddoniaVery HardLadueModerately HardLake Forest EstaVery HardLake LotawanaVery HardLake Saint LouisModerately HardLake SherwoodVery HardLake TapawingoVery HardLake WaukomisVery HardLake WinnebagoVery HardLampeModerately HardLanaganModerately HardLancasterModerately HardLaqueyVery HardLaredoModerately HardLathamModerately HardLathropVery HardLawsonVery HardLeadwoodVery HardLeasburgModerately HardLebanonHardLees SummitVery HardLeetonVery HardLemayModerately HardLenoxModerately HardLentnerModerately HardLeonardModerately HardLeopoldHardLeslieModerately HardLestervilleSlightly HardLevasyVery HardLewistownModerately HardLexingtonVery HardLiberalSoftLickingHardLilbournModerately HardLincolnVery HardLinnVery HardLinn CreekVery HardLinneusModerately HardLivoniaModerately HardLockwoodVery HardLohmanModerately HardLone JackVery HardLonedellModerately HardLong LaneModerately HardLoose CreekVery HardLouisburgHardLouisianaModerately HardLowndesHardLowry CityVery HardLucerneModerately HardLudlowModerately HardLuebberingModerately HardLurayModerately HardLynchburgHardMacks CreekVery HardMacombModerately HardMaconVery HardMadisonVery HardMaitlandHardMaldenModerately HardManchesterModerately HardMansfieldHardMaplewoodModerately HardMarcelineModerately HardMarionvilleHardMarquandVery HardMarshfieldHardMarstonHardMartin CityVery HardMartinsburgVery HardMartinsvilleVery HardMarvel Cave ParkModerately HardMaryland HeightsModerately HardMaryvilleHardMatthewsModerately HardMaysvilleHardMayviewVery HardMaywoodVery HardMc FallVery HardMc GeeHardMeadvilleHardMemphisModerately HardMendonModerately HardMercerHardMetaVery HardMexicoVery HardMiamiModerately HardMiddle BrookVery HardMiddletownVery HardMilanModerately HardMill SpringHardMillcreekVery HardMillerModerately HardMillersvilleVery HardMiloHardMindenminesSoftMineral PointVery HardMissouri CityVery HardMoberlyVery HardMokaneVery HardMonettModerately HardMonroe CityVery HardMontgomery CityVery HardMonticelloModerately HardMontrealVery HardMontroseHardMoodyHardMooresvilleSlightly HardMoraVery HardMorehouseHardMorleySlightly HardMorrisonVery HardMorrisvilleHardMoscow MillsVery HardMound CityVery HardMoundvilleVery HardMount SterlingModerately HardMount VernonHardMountain GroveHardMountain ViewHardMyrtleModerately HardNapoleonVery HardNaptonModerately HardNaylorModerately HardNeck CityHardNeelyvilleSlightly HardNelsonModerately HardNeoshoModerately HardNevadaHardNew BloomfieldVery HardNew BostonModerately HardNew CambriaVery HardNew FlorenceVery HardNew FranklinVery HardNew HamptonSlightly HardNew HavenModerately HardNew LondonVery HardNew MadridHardNew WellsModerately HardNewarkModerately HardNewburgVery HardNewtownHardNianguaHardNixaModerately HardNobleModerately HardNoelHardNorborneHardNormandyModerately HardNorth CountyModerately HardNorth Kansas CitVery HardNorwoodHardNottinghillModerately HardNoveltyModerately HardNovingerModerately HardO FallonModerately HardOak GroveVery HardOak RidgeVery HardOdessaVery HardOld AppletonVery HardOld MonroeVery HardOldfieldModerately HardOleanModerately HardOlivetteModerately HardOranSlightly HardOregonVery HardOronogoHardOrrickVery HardOsage BeachVery HardOsbornHardOsceolaVery HardOttervilleVery HardOverlandModerately HardOwensvilleVery HardOxlyHardOzarkModerately HardPacificHardPalmyraVery HardParisModerately HardParkvilleVery HardParmaModerately HardParnellHardPattersonModerately HardPattonModerately HardPattonsburgSlightly HardPeace ValleyHardPeculiarVery HardPerkinsSlightly HardPerryModerately HardPerryvilleHardPevelyVery HardPhiladelphiaHardPhillipsburgHardPickeringHardPiedmontModerately HardPierce CityModerately HardPilot GroveVery HardPilot KnobHardPittsburgHardPlatoModerately HardPlatte CityVery HardPlattsburgVery HardPleasant HillVery HardPleasant HopeHardPleasant ValleyVery HardPolkHardPollockModerately HardPoloVery HardPomonaHardPonce De LeonModerately HardPontiacModerately HardPoplar BluffSlightly HardPortage Des SiouModerately HardPortagevilleModerately HardPortlandVery HardPotosiHardPottersvilleHardPowellModerately HardPowersiteModerately HardPowersvilleModerately HardPoynorModerately HardPrairie HomeVery HardPrestonVery HardPrincetonHardPurcellHardPurdinModerately HardPurdyModerately HardPuxicoVery HardQueen CityModerately HardQuincyVery HardQulinModerately HardRacineModerately HardRandolphVery HardRavenwoodHardRaymondvilleHardRaymoreVery HardRaytownVery HardRayvilleVery HardReaHardRedfordModerately HardReedsHardRenickVery HardRepublicModerately HardRevereModerately HardRhinelandVery HardRich HillModerately HardRichardsVery HardRichlandVery HardRichmondHardRichmond HeightsModerately HardRichwoodsModerately HardRidgedaleModerately HardRidgewaySlightly HardRiscoModerately HardRivertonModerately HardRoachVery HardRobertsvilleModerately HardRobyModerately HardRocheportModerately HardRock PortVery HardRockaway BeachModerately HardRockvilleVery HardRocky ComfortModerately HardRocky MountVery HardRogersvilleModerately HardRollaVery HardRoscoeVery HardRosebudVery HardRosendaleHardRothvilleModerately HardRueterModerately HardRush HillVery HardRushvilleHardRussellvilleModerately HardRutledgeModerately HardSaint AnnModerately HardSaint CharlesModerately HardSaint ClairModerately HardSaint ElizabethVery HardSaint JamesVery HardSaint JosephHardSaint LouisModerately HardSaint MaryVery HardSaint PetersModerately HardSaint RobertVery HardSaint ThomasModerately HardSalemHardSalisburyModerately HardSanta FeModerately HardSappingtonModerately HardSarcoxieHardSavannahHardSchell CityVery HardScopusHardScott CityModerately HardSedaliaVery HardSedgewickvilleVery HardSeligmanSlightly HardSenathHardSenecaModerately HardSeymourHardShelbinaModerately HardShelbyvilleModerately HardSheldonHardShell KnobModerately HardSheridanHardSibleyVery HardSikestonSlightly HardSilexVery HardSilvaModerately HardSkidmoreHardSlaterModerately HardSmithtonVery HardSmithvilleVery HardSoloModerately HardSouderModerately HardSouth CountyModerately HardSouth GreenfieldModerately HardSouth West CityModerately HardSpartaModerately HardSpickardHardSpokaneModerately HardSpringfieldModerately HardSquiresModerately HardStanberryHardStark CityModerately HardSteedmanVery HardSteeleModerately HardStellaModerately HardStocktonHardStotesburyModerately HardStotts CityModerately HardStoutlandVery HardStoutsvilleModerately HardStoverVery HardStraffordModerately HardStrasburgVery HardSturdivantHardSturgeonModerately HardSuccessHardSugar CreekVery HardSullivanModerately HardSummersvilleHardSumnerVery HardSunrise BeachVery HardSweet SpringsModerately HardSyracuseVery HardTallapoosaHardTaneyvilleModerately HardTarkioVery HardTaylorVery HardTebbettsVery HardTecumsehHardThayerVery HardThompsonVery HardTiffModerately HardTightwadHardTinaHardTiptonVery HardTown And CountryModerately HardTrentonModerately HardTrimbleVery HardTriplettVery HardTroyVery HardTruxtonVery HardTunasModerately HardTurneyVery HardTuscumbiaVery HardUdallModerately HardUlmanModerately HardUnionModerately HardUnion StarHardUniontownModerately HardUnionvilleModerately HardUniversity CityModerately HardUrbanaHardUrichHardUticaSlightly HardValles MinesVery HardValley ParkModerately HardVan BurenModerately HardVandaliaVery HardVanduserSlightly HardVanzantModerately HardVeronaHardVersaillesHardViburnumVery HardVichyModerately HardViennaVery HardVilla RidgeModerately HardVulcanModerately HardWalkerModerately HardWalnut GroveModerately HardWalnut ShadeModerately HardWappapelloVery HardWarrensburgVery HardWarrentonVery HardWarsawVery HardWashburnSlightly HardWashingtonModerately HardWatsonVery HardWaverlyHardWaylandHardWeatherbyHardWeaubleauVery HardWebb CityHardWebster GrovesModerately HardWellingtonVery HardWellsvilleHardWentworthModerately HardWentzvilleModerately HardWest AltonModerately HardWest CountyModerately HardWest PlainsHardWestboroVery HardWestonVery HardWestphaliaVery HardWheatlandVery HardWheatonModerately HardWheelingModerately HardWhiteman AfbVery HardWhiteoakHardWhitesideVery HardWhitewaterVery HardWillardModerately HardWilliamsburgVery HardWilliamstownHardWilliamsvilleVery HardWillow SpringsHardWindsorHardWindyvilleModerately HardWinfieldVery HardWiniganModerately HardWinonaHardWinstonVery HardWooldridgeVery HardWorthVery HardWorthingtonModerately HardWright CityVery HardWyacondaHardWyattVery HardYukonModerately HardZalmaHardZanoniModerately Hard