How hard is the water in Idaho?

The average water hardness across Idaho is 157 PPM (9.2 GPG), classified as moderately hard. Hardness varies by city - the hardest water is in Bancroft (418 PPM) and the softest is in Dixie (11 PPM).

What city in Idaho has the hardest water?

Bancroft has the hardest water in Idaho at 418 PPM. A water softener is recommended for residents.

How many water systems are in Idaho?

Idaho has 764 active community water systems serving 252 cities.

Water Hardness in Idaho

Average: 157 PPMModerately Hard252 cities764 water systems

Top 10 Hardest Water Cities

#	City	Hardness
1	Bancroft	Very Hard (418 PPM)
2	Weston	Very Hard (411 PPM)
3	Montpelier	Very Hard (372 PPM)
4	Rockland	Very Hard (345 PPM)
5	Grace	Very Hard (344 PPM)
6	Malad City	Very Hard (337 PPM)
7	Grand View	Very Hard (331 PPM)
8	Preston	Very Hard (327 PPM)
9	Challis	Very Hard (322 PPM)
10	Moyie Springs	Very Hard (316 PPM)

Top 10 Softest Water Cities

#	City	Hardness
1	Dixie	Soft (11 PPM)
2	Pierce	Soft (19 PPM)
3	Horseshoe Bend	Soft (22 PPM)
4	Clayton	Soft (25 PPM)
5	Hammett	Soft (25 PPM)
6	Mountain Home	Soft (25 PPM)
7	Stanley	Soft (25 PPM)
8	Donnelly	Soft (25 PPM)
9	King Hill	Soft (26 PPM)
10	Garden Valley	Soft (31 PPM)

All Cities in Idaho

AcequiaHard AhsahkaModerately Hard AlbionVery Hard AlmoVery Hard American FallsHard AmmonHard ArbonHard ArcoModerately Hard ArimoHard AshtonHard AtholModerately Hard Atomic CityHard AverySoft BancroftVery Hard BanksSlightly Hard BasaltHard BayviewModerately Hard BellevueModerately Hard BernHard BlackfootHard BlanchardSlightly Hard BlissVery Hard BloomingtonHard BoiseSlightly Hard Bonners FerrySlightly Hard BovillSlightly Hard BuhlHard BurleyVery Hard CalderSoft CaldwellModerately Hard CambridgeSlightly Hard CareyHard CareywoodSlightly Hard CarmenHard CastlefordHard CataldoModerately Hard ChallisVery Hard ChesterHard ChubbuckHard Clark ForkSlightly Hard ClarkiaSlightly Hard ClaytonSoft ClearwaterSoft CliftonHard CocolallaSlightly Hard Coeur D AleneModerately Hard CoolinSlightly Hard CorralSlightly Hard CottonwoodSoft CouncilSlightly Hard CraigmontModerately Hard CuldesacSlightly Hard DaytonHard DearySlightly Hard DecloVery Hard DesmetSlightly Hard DietrichHard DixieSoft DonnellySoft DowneyHard DriggsHard DuboisModerately Hard EagleSlightly Hard EastportSlightly Hard EdenHard Elk HornHard Elk RiverSoft EllisHard FairfieldSoft FeltHard FerdinandModerately Hard FernwoodSlightly Hard FilerHard FirthHard Fish HavenHard Fort HallHard FranklinHard FruitlandSlightly Hard Garden CitySlightly Hard Garden ValleySoft GeneseeSlightly Hard GenevaHard GeorgetownVery Hard GibbonsvilleHard Glenns FerrySoft GoodingVery Hard GraceVery Hard Grand ViewVery Hard GrangevilleSlightly Hard GrasmereModerately Hard GreencreekSlightly Hard GreenleafModerately Hard HagermanModerately Hard HaileyHard HamerHard HammettSoft HansenHard HarrisonModerately Hard HarvardSlightly Hard Hayden LakeSlightly Hard HazeltonHard HeyburnVery Hard Hill CitySlightly Hard HolbrookHard HomedaleVery Hard HopeSlightly Hard Horseshoe BendSoft HoweHard Idaho CitySoft Idaho FallsHard Indian ValleySlightly Hard InkomHard IonaHard IrwinHard Island ParkHard JeromeHard JuliaettaSlightly Hard KamiahSlightly Hard KelloggSoft KendrickSlightly Hard KimberlyHard King HillSoft KingstonSlightly Hard KunaSlightly Hard LacledeSlightly Hard LapwaiSlightly Hard Lava Hot SpringsHard LeadoreHard LemhiHard LenoreSlightly Hard LewisvilleHard LowmanSlightly Hard LucileSlightly Hard MackayModerately Hard Macks InnHard Malad CityVery Hard MarsingVery Hard Mc CallSoft Mc CammonHard MedimontModerately Hard MelbaModerately Hard MenanHard MeridianSlightly Hard MesaSlightly Hard MiddletonModerately Hard MidvaleSlightly Hard MonteviewVery Hard MontourModerately Hard MontpelierVery Hard MooreHard MoscowSlightly Hard Mountain HomeSoft Mountain Home ASlightly Hard Moyie SpringsVery Hard MullanSlightly Hard MurraySoft MurtaughHard NafVery Hard NampaModerately Hard NaplesSlightly Hard New MeadowsSoft New PlymouthModerately Hard NewdaleModerately Hard NezperceModerately Hard NordmanSlightly Hard North ForkHard NotusModerately Hard OakleyVery Hard ObsidianModerately Hard OlaSlightly Hard Old TownSlightly Hard OreanaSlightly Hard OrofinoModerately Hard OsburnSlightly Hard ParisHard ParmaModerately Hard PattersonHard PaulVery Hard PayetteModerately Hard PeckSlightly Hard PicaboModerately Hard PierceSoft PinehurstSlightly Hard PingreeHard PlacervilleSlightly Hard PlummerSlightly Hard PocatelloHard PollockSlightly Hard PonderaySlightly Hard Post FallsModerately Hard PotlatchSlightly Hard PrestonVery Hard Priest RiverSlightly Hard PrincetonSlightly Hard RathdrumModerately Hard ReubensModerately Hard RexburgHard RichfieldModerately Hard RigbyHard RigginsVery Hard RirieHard RobertsHard RocklandVery Hard RogersonHard SagleSlightly Hard Saint AnthonySlightly Hard Saint CharlesHard Saint MariesSlightly Hard SalmonHard SandpointSlightly Hard SantaSlightly Hard ShelleyVery Hard ShoshoneHard ShoupSoft SilvertonSlightly Hard SmeltervilleSlightly Hard Soda SpringsVery Hard South Gate PlazaSlightly Hard SpencerHard Spirit LakeModerately Hard SpringfieldHard StanleySoft StarSlightly Hard SterlingHard StitesSlightly Hard Sugar CityHard Sun ValleyModerately Hard Swan ValleyHard SwanlakeHard SweetSlightly Hard TendoyHard TensedSlightly Hard TerretonHard TetonHard TetoniaHard ThatcherHard TroySlightly Hard Twin FallsHard VictorHard ViolaSlightly Hard WallaceSoft WayanHard WeippeSlightly Hard WeiserSlightly Hard WendellModerately Hard West MountainSoft WestonVery Hard White BirdSoft WilderModerately Hard WinchesterSlightly Hard WorleyModerately Hard Yellow PineSoft