How hard is the water in Colorado?

The average water hardness across Colorado is 299 PPM (17.5 GPG), classified as very hard. Hardness varies by city - the hardest water is in Arriba (2276 PPM) and the softest is in Black Hawk (7 PPM).

What city in Colorado has the hardest water?

Arriba has the hardest water in Colorado at 2276 PPM. A water softener is recommended for residents.

How many water systems are in Colorado?

Colorado has 1,048 active community water systems serving 386 cities.

Water Hardness in Colorado

Average: 299 PPMVery Hard386 cities1,048 water systems

Top 10 Hardest Water Cities

#	City	Hardness
1	Arriba	Very Hard (2276 PPM)
2	Limon	Very Hard (2276 PPM)
3	Karval	Very Hard (2141 PPM)
4	Genoa	Very Hard (2061 PPM)
5	Agate	Very Hard (1800 PPM)
6	Hugo	Very Hard (1449 PPM)
7	Amherst	Very Hard (1240 PPM)
8	Anton	Very Hard (1240 PPM)
9	Atwood	Very Hard (1240 PPM)
10	Cope	Very Hard (1240 PPM)

Top 10 Softest Water Cities

#	City	Hardness
1	Black Hawk	Soft (7 PPM)
2	Central City	Soft (7 PPM)
3	Rollinsville	Soft (7 PPM)
4	Silverton	Soft (8 PPM)
5	Cuchara	Soft (14 PPM)
6	Alamosa	Soft (19 PPM)
7	Blanca	Soft (19 PPM)
8	Fort Garland	Soft (19 PPM)
9	Hooper	Soft (19 PPM)
10	Mesita	Soft (19 PPM)

All Cities in Colorado

AgateVery Hard AguilarVery Hard AkronModerately Hard AlamosaSoft AllensparkSlightly Hard AlmaModerately Hard AlmontHard AmherstVery Hard AntonVery Hard AntonitoSoft ArapahoeHard ArbolesSoft ArlingtonSlightly Hard ArribaVery Hard ArvadaSlightly Hard AspenSoft AtwoodVery Hard AultSlightly Hard AuroraSlightly Hard AustinVery Hard AvonHard BaileySlightly Hard BasaltHard Battlement MesaVery Hard BayfieldSlightly Hard BedrockVery Hard BellvueSlightly Hard BennettSlightly Hard BerthoudSlightly Hard BethuneModerately Hard BeulahModerately Hard Black HawkSoft BlancaSoft BoncarboVery Hard BondHard BooneModerately Hard BoulderSlightly Hard Bow MarSlightly Hard BransonVery Hard BreckenridgeSlightly Hard BriggsdaleSlightly Hard BroomfieldSlightly Hard BrushVery Hard Buena VistaSlightly Hard Buffalo CreekSlightly Hard BurlingtonModerately Hard BurnsHard ByersSlightly Hard CaddoaVery Hard CahoneVery Hard CalhanSlightly Hard CampoVery Hard Canon CityVery Hard CapulinSoft CarrSlightly Hard Castle RockHard CedaredgeSlightly Hard CentennialModerately Hard CenterHard Central CitySoft ChamaModerately Hard CherawVery Hard Cherry Hills VilSlightly Hard Cheyenne WellsHard ChivingtonVery Hard ChromoSoft CimarronSlightly Hard ClarkSlightly Hard CliftonVery Hard Coal CreekVery Hard CoaldaleVery Hard CoalmontSlightly Hard CollbranVery Hard Colorado SpringsSlightly Hard Commerce CitySlightly Hard ComoSlightly Hard ConiferSlightly Hard CopeVery Hard Copper MountainSlightly Hard CortezVery Hard CotopaxiVery Hard CowdreySlightly Hard CraigModerately Hard CrawfordVery Hard CreedeVery Hard Crested ButteSlightly Hard CrestoneModerately Hard Cripple CreekSlightly Hard CrookVery Hard CrowleySlightly Hard CucharaSoft DaconoSlightly Hard De BequeVery Hard DeckersHard Deer TrailSlightly Hard DelhiVery Hard DeltaVery Hard DenverSlightly Hard DeoraVery Hard DinosaurVery Hard DivideSlightly Hard DoloresModerately Hard Dove CreekVery Hard DrakeSlightly Hard DumontSoft DupontSlightly Hard DurangoSlightly Hard EagleHard EatonSlightly Hard EckleyModerately Hard EdgewaterSlightly Hard EdwardsHard EgnarVery Hard ElbertSlightly Hard Eldorado SpringsSlightly Hard ElizabethSoft EmpireSoft EnglewoodSlightly Hard ErieSlightly Hard Estes ParkSlightly Hard EvansSlightly Hard EvergreenSlightly Hard FairplayModerately Hard FarisitaSlightly Hard FaristaVery Hard Federal HeightsSlightly Hard FirestoneSlightly Hard First InterstateSlightly Hard FlaglerHard FlemingVery Hard FlorenceVery Hard FlorissantSlightly Hard Fort CarsonSlightly Hard Fort CollinsSlightly Hard Fort GarlandSoft Fort MorganVery Hard FountainSlightly Hard FowlerVery Hard FranktownHard FraserSoft FrederickSlightly Hard FruitaVery Hard FruitvaleVery Hard Garden CitySlightly Hard GatewayVery Hard GenoaVery Hard GeorgetownSoft GilcrestSlightly Hard GillSlightly Hard GilmanHard Glade ParkVery Hard Glen HavenSlightly Hard GlendaleSlightly Hard Glenwood SpringsVery Hard GoldenSlightly Hard GranadaHard GranbySoft Grand JunctionVery Hard Grand LakeSoft GrantSlightly Hard GreeleySlightly Hard Green Mountain FSlightly Hard Greenwood VillagSlightly Hard GroverSlightly Hard GuffeySlightly Hard GunnisonModerately Hard GypsumHard HaleVery Hard HamiltonVery Hard HartmanVery Hard HartselSlightly Hard HaswellVery Hard HaxtunVery Hard HaydenSlightly Hard HendersonSlightly Hard HesperusSlightly Hard Highlands RanchHard HillroseVery Hard HollyHard HolyokeVery Hard HooperSoft Hot Sulphur SpriSoft HotchkissSlightly Hard HowardVery Hard HoytVery Hard HudsonSlightly Hard HugoVery Hard Idaho SpringsSoft IgnacioSlightly Hard IliffVery Hard Indian HillsSlightly Hard JamestownSlightly Hard JansenVery Hard JeffersonSlightly Hard JoesVery Hard JohnstownSlightly Hard JulesburgVery Hard KarvalVery Hard KeenesburgSlightly Hard KerseySlightly Hard KeystoneSlightly Hard KiowaSoft KirkVery Hard Kit CarsonVery Hard KittredgeSlightly Hard KremmlingVery Hard La GaritaModerately Hard La JaraSoft La SalleSlightly Hard LafayetteSlightly Hard LairdModerately Hard Lake CityVery Hard Lake GeorgeModerately Hard LakewoodSlightly Hard LamarHard LaporteSlightly Hard LarkspurHard Last ChanceSlightly Hard LeadvilleSlightly Hard LewisModerately Hard LimonVery Hard Lincoln Center BSlightly Hard LindonSlightly Hard LittletonModerately Hard LochbuiSlightly Hard Log Lane VillageVery Hard LomaVery Hard LongmontSlightly Hard LouisvilleSlightly Hard LovelandSlightly Hard Lowry AfbSlightly Hard LycanHard LyonsSlightly Hard MackVery Hard ManassaSoft MancosModerately Hard Manitou SpringsSlightly Hard ManzanolaVery Hard MarbleVery Hard MathesonSlightly Hard MaybellVery Hard Mc ClaveVery Hard Mc CoyHard MeadSlightly Hard MeekerHard MeredithSoft MesaVery Hard Mesa Verde NatioModerately Hard MesitaSoft MillikenSlightly Hard MoffatSlightly Hard MolinaVery Hard Monte VistaSlightly Hard MontroseVery Hard MonumentSlightly Hard MorrisonSlightly Hard MoscaSoft Mountain ViewSlightly Hard NathropModerately Hard NaturitaVery Hard NederlandSlightly Hard New CastleVery Hard New RaymerSlightly Hard North AvondaleModerately Hard North PoleSlightly Hard NorthglennSlightly Hard NorwoodVery Hard NuclaVery Hard NunnSlightly Hard Oak CreekSlightly Hard OlatheVery Hard Olney SpringsVery Hard OphirModerately Hard OrchardVery Hard OrdwayVery Hard OtisModerately Hard OurayVery Hard OvidVery Hard PadroniVery Hard Pagosa SpringsSoft PalisadeVery Hard Palmer LakeSlightly Hard PaoniaSoft ParkerHard ParlinVery Hard ParshallSlightly Hard PeetzVery Hard PenroseVery Hard PeytonSlightly Hard PhippsburgSlightly Hard PierceSlightly Hard PineSlightly Hard PitkinVery Hard PlacervilleVery Hard PlattevilleSlightly Hard Pleasant ViewModerately Hard PowderhornSlightly Hard PuebloModerately Hard Pueblo WestModerately Hard RamahSlightly Hard RandSlightly Hard RangelyVery Hard Red CliffHard Red Feather LakeSlightly Hard RedvaleVery Hard RicoVery Hard RidgwayVery Hard RifleVery Hard RockvaleVery Hard Rocky FordVery Hard RoggenSlightly Hard RollinsvilleSoft RomeoSoft RushSlightly Hard RyeModerately Hard SaguacheModerately Hard SalidaSlightly Hard SanfordSoft SargentsVery Hard SedgwickVery Hard SeibertHard SiltVery Hard Silver PlumeSoft SilverthorneSlightly Hard SilvertonSoft SimlaVery Hard SlaterSlightly Hard SnowmassSoft Snowmass VillageSlightly Hard SnyderVery Hard SomersetSoft South ForkSlightly Hard SpringfieldVery Hard Steamboat SpringSlightly Hard SterlingVery Hard StonehamSlightly Hard StrasburgSlightly Hard StrattonModerately Hard Sugar CityVery Hard SwinkVery Hard TabernashSlightly Hard TellurideHard ThorntonSlightly Hard TimnathSlightly Hard TimpasVery Hard ToponasSlightly Hard TowaocModerately Hard TownerVery Hard TrincheraVery Hard Twin LakesSlightly Hard Two United BankSlightly Hard United States AiSlightly Hard UtleyvilleVery Hard VailHard VernonVery Hard VictorSlightly Hard VilasVery Hard Villa GroveSlightly Hard VillegreenVery Hard Virginia DaleSlightly Hard VonaVery Hard WaldenSlightly Hard WalshVery Hard WardSlightly Hard WatkinsSlightly Hard WattenburgSlightly Hard WeldonaVery Hard WellingtonSlightly Hard WestcliffeModerately Hard WestminsterSlightly Hard WestonVery Hard WetmoreHard Wheat RidgeSlightly Hard WhitewaterVery Hard Wild HorseSlightly Hard WileyVery Hard WillardVery Hard WindsorSlightly Hard Winter ParkSoft WolcottHard Woodland ParkSlightly Hard Woody CreekSoft YampaSlightly Hard Yellow JacketModerately Hard YoderSlightly Hard YumaModerately Hard