Why does water hardness vary across Kansas?

Water hardness varies across Kansas because utilities can use different groundwater wells, reservoirs, treatment plants, blends, and distribution zones. Private wells can also differ from nearby municipal water.

What city in Kansas has the hardest water?

Antonino has the hardest water among higher-confidence Kansas city pages at 712 PPM. Check the city page for local systems and ZIP codes before making treatment decisions.

Does this include municipal water, well water, or both?

The state report combines public water system records, utility reports, and USGS monitoring where available. Municipal treated-water records are preferred when present. Private well hardness can vary at the address level and should be confirmed with a local test.

How many water systems are in Kansas?

Kansas has 856 active community water systems serving 623 cities.

Water Hardness in Kansas

Average: 318 PPMVery Hard623 cities856 water systems

State report

Is Kansas Water Hard or Soft?

Kansas water is very hard on average at 318 PPM (18.6 GPG). Local readings can vary by utility, aquifer, treatment plant, and private well use.

State average

318 PPM

Very Hard

Local coverage

623 cities

856 water systems

Source profile

287 ZIPs

direct or USGS-backed

58% of covered ZIPs use nearby, county, or state estimates, so confirm local readings before sizing treatment equipment.

Methodology Data sources Search by ZIP code

State data profile

How to read the Kansas 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

287 of 685

42% use treated-water records or USGS monitoring.

Estimated ZIP values

398 ZIPs

58% 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

318 PPM

Very Hard

Coverage

623 cities

856 water systems in the state rollup.

Data Source Coverage

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

685 ZIPs covered

Verified treated water

Utility, CCR, or state treated-water records

22%

153 ZIPs

High-confidence USGS

Environmental monitoring matched to local systems

20%

134 ZIPs

Estimated

Nearby, county, or state-level fallback values

58%

398 ZIPs

In Kansas, 22% of ZIPs use verified treated-water records, 20% use high-confidence USGS monitoring, and 58% use estimates that should be confirmed locally for treatment decisions.

What the Data Shows in Kansas

Hard or very hard water is widespread in Kansas, covering 89% of classified ZIPs.

Kansas relies heavily on nearby, county, or state estimates: 58% of ZIPs use fallback values, so local testing matters more here than in states with stronger direct coverage.

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% (0)

Slightly Hard4% (30)

Moderately Hard6% (43)

Hard42% (290)

Very Hard47% (322)

Treatment Takeaway

For many homes in Kansas, 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

Because estimated ZIP values are common in Kansas, use this page for screening and compare against a utility report or home test before buying equipment.

Source-Backed Water Systems in Kansas

Large systems with treated-water reports or USGS monitoring behind the state rollup.

Review source labels

Water system	Hardness	Source label	Population
Water District 1 Of Johnson Co KS2009110 - Johnson County	200 PPM Hard	Annual Water Quality Report Verified - Annual Water Quality Report	482,000
Wichita, City Of KS2017308 - Sedgwick County	210 PPM Hard	Annual Water Quality Report Verified - Annual Water Quality Report	395,699
Kansas City Board Of Public Utilities KS2020906 - Wyandotte County	200 PPM Hard	Annual Water Quality Report Verified - Annual Water Quality Report	152,960
Olathe, City Of KS2009115 - Johnson County	200 PPM Hard	Annual Water Quality Report Verified - Annual Water Quality Report	143,014
Topeka, City Of KS2017701 - Shawnee County	200 PPM Hard	Annual Water Quality Report Verified - Annual Water Quality Report	125,963
Lawrence, City Of KS2004503 - Douglas County	160 PPM Moderately Hard	Annual Water Quality Report Verified - Annual Water Quality Report	95,256
Manhattan, City Of KS2016112 - Riley County	150 PPM Moderately Hard	Annual Water Quality Report Verified - Annual Water Quality Report	54,763
Salina, City Of KS2016914 - Saline County	250 PPM Very Hard	Annual Water Quality Report Verified - Annual Water Quality Report	46,481

Useful Kansas City Pages

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

Cities With More Local Data

Moderately Hard (160 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	Antonino	Very Hard (712 PPM)
2	Dodge City	Very Hard (696 PPM)
3	Tonganoxie	Very Hard (315 PPM)
4	Basehor	Very Hard (315 PPM)
5	Milford	Very Hard (311 PPM)
6	Junction City	Very Hard (303 PPM)
7	Girard	Very Hard (261 PPM)
8	Assaria	Very Hard (254 PPM)
9	Louisburg	Hard (232 PPM)
10	Goddard	Hard (212 PPM)

Top 10 Softest Water Cities

#	City	Hardness
1	Manhattan	Moderately Hard (150 PPM)
2	Lawrence	Moderately Hard (160 PPM)
3	Tribune	Hard (180 PPM)
4	Kansas City	Hard (200 PPM)
5	Leawood	Hard (200 PPM)
6	Lenexa	Hard (200 PPM)
7	Olathe	Hard (200 PPM)
8	Overland Park	Hard (200 PPM)
9	Shawnee	Hard (200 PPM)
10	Stanley	Hard (200 PPM)

All Cities in Kansas

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

AbbyvilleVery Hard AbileneSlightly Hard AdmireHard AgendaVery Hard AgraVery Hard AlamotaVery Hard AlbertVery Hard AldenHard AlexanderVery Hard AlmaVery Hard AlmenaVery Hard Alta VistaVery Hard AltamontVery Hard AltonVery Hard AltoonaHard AmericusHard AndaleHard AndoverHard AntelopeHard AnthonyVery Hard AntoninoVery Hard ArcadiaVery Hard ArgoniaVery Hard Arkansas CityHard ArlingtonVery Hard ArmaVery Hard ArnoldVery Hard AshlandVery Hard AssariaVery Hard AtchisonVery Hard AtholVery Hard AtlantaHard AtticaHard AtwoodModerately Hard AuburnHard AugustaHard AuroraVery Hard AxtellVery Hard BaileyvilleHard Baldwin CityModerately Hard BarnardSlightly Hard BarnesVery Hard BartlettHard BasehorVery Hard Baxter SpringsHard BazineVery Hard BeattieVery Hard BeaumontHard BeelerVery Hard Bel AireHard BellaireVery Hard Belle PlaineVery Hard BellevilleVery Hard BelmontVery Hard BelpreHard BelvueVery Hard BendenaHard BenedictHard BenningtonVery Hard BentleyHard BentonHard BernVery Hard BerrytonHard BeverlyVery Hard Bird CityModerately Hard BisonVery Hard BlaineVery Hard BloomVery Hard Blue MoundHard Blue RapidsVery Hard Bluff CityVery Hard BogueVery Hard BremenHard BrewsterModerately Hard BronsonHard BrookvilleHard BrownellVery Hard BucklinVery Hard BucyrusHard BuffaloHard BuhlerVery Hard Bunker HillVery Hard BurdenHard BurdettVery Hard BurdickHard BurlingameHard BurnsHard Burr OakVery Hard BurrtonHard BushongHard BushtonVery Hard ByersVery Hard CaldwellVery Hard CambridgeHard CaneySlightly Hard CantonVery Hard CarbondaleHard CarlyleHard CaronaVery Hard CassodayHard Cawker CityVery Hard CedarVery Hard Cedar ValeSlightly Hard CentervilleHard CentraliaVery Hard ChanuteHard ChapmanVery Hard ChaseVery Hard ChautauquaSlightly Hard CheneyHard CherokeeVery Hard CherryvaleVery Hard ChetopaModerately Hard CimarronVery Hard CirclevilleVery Hard ClaflinVery Hard Clay CenterVery Hard ClaytonVery Hard ClearwaterHard ClementsVery Hard CliftonVery Hard ClimaxHard ClydeVery Hard CoatsVery Hard CoffeyvilleModerately Hard ColbyModerately Hard ColdwaterVery Hard CollyerVery Hard ColonyHard ColwichHard ConwayVery Hard Conway SpringsVery Hard CoolidgeVery Hard CopelandVery Hard CorningVery Hard Cottonwood FallsVery Hard CountrysideHard CourtlandVery Hard CubaVery Hard CulverVery Hard CummingsVery Hard DamarVery Hard DanvilleHard De SotoHard DearingModerately Hard DeerfieldVery Hard DelavanVery Hard DeliaVery Hard DelphosVery Hard DenisonVery Hard DennisHard DensmoreVery Hard DentonVery Hard DerbyHard DexterHard Dodge CityVery Hard DorranceSlightly Hard DouglassHard DownsVery Hard DresdenVery Hard DuluthVery Hard DunlapVery Hard DurhamHard DwightVery Hard EastboroughHard EastonVery Hard EdgertonHard EdnaModerately Hard EdsonVery Hard EffinghamVery Hard El DoradoHard ElbingHard Elk CitySlightly Hard Elk FallsHard ElkhartHard EllinwoodVery Hard EllisVery Hard EllsworthSlightly Hard ElmdaleVery Hard ElsmoreHard ElwoodVery Hard EmmettVery Hard EmporiaHard EnglewoodVery Hard EnsignVery Hard EnterpriseVery Hard ErieHard EsbonVery Hard EskridgeHard EudoraModerately Hard EurekaHard EverestHard FairviewVery Hard Fall RiverHard FalunHard FarlingtonVery Hard FlorenceHard FontanaHard FordVery Hard FormosoVery Hard Fort LeavenworthVery Hard Fort RileyHard FowlerModerately Hard FranklinVery Hard FreeportVery Hard FriendVery Hard FrontenacVery Hard FultonHard GalatiaVery Hard GalenaVery Hard GalesburgHard GalvaVery Hard Garden CityVery Hard Garden PlainHard GardnerHard GarfieldVery Hard GarlandHard GarnettHard GaylordVery Hard GemModerately Hard GeneseoVery Hard Geuda SpringsVery Hard GirardVery Hard GladeVery Hard GlascoVery Hard Glen ElderHard GoddardHard GoesselHard GoffVery Hard GoodlandModerately Hard GorhamHard GoveVery Hard GrainfieldVery Hard GrantvilleVery Hard GreeleyHard GreenVery Hard GreenleafVery Hard GreensburgVery Hard GrenolaSlightly Hard GridleyHard GrinnellVery Hard GypsumVery Hard HaddamVery Hard HallowellVery Hard HalsteadHard HamiltonHard HanoverVery Hard HanstonVery Hard HardtnerVery Hard HarperVery Hard HartfordHard HarveyvilleHard HavanaSlightly Hard HavenVery Hard HavensvilleVery Hard HavilandVery Hard HaysvilleHard HazeltonHard HealyVery Hard HeizerVery Hard HeplerVery Hard HerndonModerately Hard HesstonHard HiattvilleHard HighlandVery Hard Hill CityVery Hard HillsboroHard HolcombVery Hard HollenbergModerately Hard HoltonVery Hard HolyroodVery Hard HomeVery Hard HopeSlightly Hard HortonHard HowardSlightly Hard HoxieVery Hard HoytVery Hard HudsonHard HugotonHard HumboldtHard HunterSlightly Hard HuronVery Hard HutchinsonVery Hard IndependenceVery Hard IngallsVery Hard InmanVery Hard IoniaSlightly Hard IsabelHard IukaHard JamestownVery Hard JenningsVery Hard JetmoreVery Hard JohnsonVery Hard Junction CityVery Hard KanopolisVery Hard KanoradoModerately Hard Kansas CityHard KechiHard KellyVery Hard KendallHard KensingtonVery Hard KinsleyHard KiowaHard KirwinVery Hard KismetHard La CrosseVery Hard La CygneHard La HarpeHard LafontaineSlightly Hard Lake CityVery Hard Lake Of The ForeHard Lake QuiviraHard LakinHard LaneHard LangdonVery Hard LansingVery Hard LathamHard LawrenceModerately Hard LawtonVery Hard Le RoyHard LeavenworthVery Hard LeawoodHard LeboHard LecomptonModerately Hard LehighHard LenexaHard LeonHard LeonaHard LeonardvilleModerately Hard LeotiModerately Hard LevantVery Hard LewisHard LiberalHard LibertyHard LiebenthalVery Hard LindsborgVery Hard LinnModerately Hard LinwoodVery Hard Little RiverVery Hard LoganVery Hard Long IslandVery Hard LongfordVery Hard LongtonSlightly Hard LorraineVery Hard Lost SpringsHard LouisburgHard LucasVery Hard LudellModerately Hard LuraySlightly Hard LyndonHard LyonsVery Hard MacksvilleHard MadisonHard MahaskaVery Hard MaizeHard ManhattanModerately Hard MankatoVery Hard ManterVery Hard Maple CityHard Maple HillVery Hard MapletonHard MarionHard MarquetteVery Hard MarysvilleVery Hard Matfield GreenVery Hard MayettaVery Hard MayfieldSlightly Hard Mc CrackenVery Hard Mc CuneVery Hard Mc DonaldModerately Hard Mc FarlandVery Hard Mc LouthVery Hard MeadeModerately Hard Medicine LodgeHard MedoraVery Hard MelvernHard MenloModerately Hard MeridenVery Hard MilanHard MildredHard MilfordVery Hard MiltonHard MiltonvaleVery Hard MinneapolisVery Hard MissionHard ModocVery Hard MolineSlightly Hard MontezumaModerately Hard MonumentVery Hard MoranHard MorganvilleVery Hard MorlandVery Hard MorrillVery Hard MorrowvilleVery Hard MoscowHard Mound CityHard Mound ValleyVery Hard MoundridgeVery Hard Mount HopeHard MulberryVery Hard MullinvilleHard MulvaneHard MundenVery Hard MurdockVery Hard MuscotahVery Hard NarkaVery Hard NashvilleHard NatomaVery Hard NealHard NekomaVery Hard NeodeshaVery Hard Neosho FallsHard Neosho RapidsHard Ness CityVery Hard NetawakaVery Hard New CambriaVery Hard NewtonHard NickersonVery Hard NiotazeHard NorcaturModerately Hard North NewtonHard NortonVery Hard NortonvilleVery Hard NorwichVery Hard OakleyModerately Hard OberlinModerately Hard OfferleHard OgallahVery Hard OgdenModerately Hard OketoVery Hard OlatheHard OlpeHard OlsburgVery Hard OneidaVery Hard OpolisVery Hard Osage CityHard OsawatomieHard OsborneVery Hard OskaloosaVery Hard OswegoVery Hard OttawaHard OverbrookVery Hard Overland ParkHard OxfordSlightly Hard OzawkieHard PalcoVery Hard PalmerVery Hard PaolaHard ParadiseSlightly Hard ParkVery Hard Park CityHard ParkerHard ParsonsHard PartridgeVery Hard PaulineHard Pawnee RockVery Hard PaxicoVery Hard PeabodyHard PeckHard PenalosaHard PenokeeVery Hard PerryVery Hard PeruSlightly Hard PfeiferVery Hard PhillipsburgVery Hard PiedmontHard PiercevilleVery Hard PiquaHard PlainsHard PlainvilleVery Hard PleasantonHard PlevnaVery Hard PomonaHard PortisVery Hard PotwinHard PowhattanVery Hard Prairie ViewVery Hard Prairie VillageHard PrattHard PrescottHard Pretty PrairieVery Hard PrincetonHard ProtectionVery Hard QuenemoHard QuinterVery Hard RadiumHard RadleyVery Hard RamonaHard RandallSlightly Hard RandolphModerately Hard RansomVery Hard RantoulHard RaymondVery Hard ReadingHard RedfieldHard RepublicVery Hard ReserveHard RiceVery Hard RichfieldVery Hard RichmondHard RileyModerately Hard RivertonHard RockHard RollaVery Hard RosaliaHard Rose HillHard RosedaleHard RossvilleHard RozelVery Hard Rush CenterVery Hard RussellSlightly Hard SabethaVery Hard Saint GeorgeVery Hard Saint JohnHard Saint MarysVery Hard Saint PaulHard SalinaVery Hard SatantaVery Hard SavonburgHard SawyerHard ScandiaVery Hard SchoenchenVery Hard ScottsvilleSlightly Hard ScrantonHard SedanSlightly Hard SedgwickHard SeldenModerately Hard SeveranceVery Hard SharonHard Sharon SpringsModerately Hard ShawneeHard Shawnee MissionHard Silver LakeHard SimpsonVery Hard Smith CenterVery Hard SoldierVery Hard SolomonVery Hard South HavenVery Hard South HutchinsonVery Hard SpearvilleVery Hard SpiveyVery Hard Spring HillHard StaffordHard StanleyHard StarkHard SterlingVery Hard StilwellHard StocktonVery Hard StrawnHard Strong CityVery Hard SubletteVery Hard SummerfieldVery Hard Sun CityVery Hard SusankVery Hard SycamoreVery Hard Sylvan GroveVery Hard SylviaVery Hard SyracuseHard TalmageVery Hard TampaHard TecumsehHard ThayerHard TiptonSlightly Hard TonganoxieVery Hard TopekaHard TorontoSlightly Hard TowandaHard TreeceVery Hard TribuneHard TyroHard UdallHard UlyssesVery Hard UniontownHard UticaVery Hard Valley CenterHard Valley FallsHard VassarHard VictoriaVery Hard ViolaHard VirgilHard VlietsVery Hard Wa KeeneyVery Hard WakarusaHard WakefieldVery Hard WaldoSlightly Hard WaldronHard WalkerVery Hard WallaceModerately Hard WalnutVery Hard WaltonHard WamegoVery Hard WashingtonVery Hard WatervilleVery Hard WathenaVery Hard WaverlyHard WebberVery Hard WeldaHard WellingtonSlightly Hard WellsvilleHard WeskanModerately Hard West MineralHard WestfallVery Hard WestphaliaHard WetmoreVery Hard WheelerModerately Hard White CityVery Hard White CloudVery Hard WhitewaterHard WhitingVery Hard WichitaHard WilliamsburgHard WilmoreVery Hard WilsonVery Hard WinchesterVery Hard WindomVery Hard WinfieldHard WinifredVery Hard WinonaVery Hard WoodbineVery Hard WoodstonVery Hard WrightVery Hard Yates CenterHard ZendaHard