Skip to content
TapBuff
ZIP

Utah water hardness, by utility.

177 Utah utilities serving 2.5 million people as they report it, from the state’s own results. Hardness is the calcium and magnesium in water; EPA sets no limit for it.

The short answer

29 utilities serving 1.4 million people have water in more than one band. Among those in one band, very hard water reaches the most people: 121 utilities serving 843,800.

The largest, Salt Lake City Water System, is hard to very hard depending on the source, 158 to 568 mg/L (9.3 to 33.2 grains per gallon).

Very hard

Above 180 mg/L (10.5 grains per gallon). 121 utilities serving 843,800 people; the 25 largest are here.

Utah utilities: very hard water
UtilityBased inServesHardness, mg/LGrains per gallon
West Jordan City Water SystemWest Jordan117,02518310.7
Orem City Water SystemOrem98,12919511.4
Saratoga Springs CitySaratoga Springs68,00028216.5
Herriman City Municipal Water DepartmentHerriman60,00075844.3
Spanish Fork CitySpanish Fork47,16940723.8
Bountiful City Water SystemBountiful37,50056132.8
Springville CitySpringville35,51624414.2
Hill Air Force BaseElwood25,62519111.2
South Salt Lake City Water SystemCoalville23,60030818
Clinton City Water SystemClinton23,00022713.3
Brigham City Water SystemWest Haven20,54021612.6
Payson City Water SystemPayson19,00023813.9
Santaquin CitySantaquin17,53223513.7
Woods Cross City Water SystemFarmington13,11025214.7
Lindon CitySpanish Fork11,90026715.6
Salem CitySantaquin11,28132018.7
Smithfield CitySmithfield10,22327316
Alpine CitySpanish Fork10,20022213
Price Municipal CorporationPrice9,96028516.7
Stansbury Park Improvement DistrictStansbury Park9,83938122.3
Providence City Water SystemHyrum9,69029617.3
Nibley City WaterWellsville9,20031918.7
Park City Water SystemPark City8,87537321.8
North Logan CitySmithfield8,50020712.1
Richfield CityRichfield8,36020111.8
All 121 with very hard water

Hard

121 to 180 mg/L (7.1 to 10.5 grains per gallon). 18 utilities serving 173,290 people, largest first.

Utah utilities: hard water
UtilityBased inServesHardness, mg/LGrains per gallon
Granger - Hunter Improvement DistrictSalt Lake City121,08317610.3
Highland CityHighland22,0001549
Taylor - West Weber WidOgden9,9001458.5
Moab CityMoab9,0001327.7
Perry CityPerry6,5701347.8
Moroni CityMorni1,6001559.1
Kane County Wcd - Johnson CanyonKanab9001569.1
San Juan Spanish Valley SsdMoab5501549
Glendale Town Water SystemGlendale4111549
Marysvale Town Water SystemMarysvale3801317.7
Utah State HospitalProvo3501669.7
Antimony Town Water SystemHarrisville1351458.5
Bear River Wcd - Collinston Water SystemCorinne1021207
Hidden Hollow Water CompanyMorgan991458.5
East Grouse Creek Pipeline CoEast Grouse Creek731619.4
Cove WaterworksCove601518.8
Cole Canyon Water CompanyLiberty391488.7
Webster Estates HOAKamas381569.1

Moderately hard

61 to 120 mg/L (3.6 to 7 grains per gallon). 8 utilities serving 78,438 people, largest first.

Utah utilities: moderately hard water
UtilityBased inServesHardness, mg/LGrains per gallon
Cedar City WaterworksCedar City39,670965.6
Farmington City Water SystemOgden27,860975.7
West Bountiful City Water SystemWoods Cross5,6001086.3
Oakley Town Water SystemOakley1,8001056.1
Panguitch City Water SystemPanguitch1,8001146.7
Milford City Water SystemMilford1,4351026
Woodland South Hills IrrigationWoodland1981156.7
Bumblebee Water SystemCedar City751056.1

Soft

Up to 60 mg/L (3.5 grains per gallon). 1 utility serving 430 people, largest first.

Utah utilities: soft water
UtilityBased inServesHardness, mg/LGrains per gallon
Bluff Water Works Service DistrictBluff4307.50.4

Varies

Water in more than one band, depending on where or when it was sampled: each is given as its range, softest to hardest, and its report says more. 29 utilities serving 1.4 million people; the 25 largest are here.

Utah utilities: varies water
UtilityBased inServesHardness, mg/LGrains per gallon
Salt Lake City Water SystemSalt Lake City383,612158 to 5689.3 to 33.2
Provo CityProvo116,288130 to 2997.6 to 17.5
St George City Water SystemSt George City105,24046 to 3702.7 to 21.6
Sandy City Water SystemLehi99,750133 to 1817.8 to 10.6
Jordan Valley WcdWest Jordan99,335100 to 3545.8 to 20.7
Lehi CityLehi93,446126 to 2487.4 to 14.5
Ogden City Water SystemBrigham City87,267141 to 3158.2 to 18.4
Taylorsville - Bennion IDRiverton67,098155 to 4439 to 25.9
Eagle Mountain CityEagle Mountain61,266169 to 5939.9 to 34.7
Washington CityHurricane45,865137 to 2008 to 11.7
Tooele City Water SystemTooele41,770158 to 3359.2 to 19.6
Pleasant Grove CityOrem40,000126 to 2617.3 to 15.2
Murray City Water SystemWest Jordan38,723169 to 1959.9 to 11.4
Hurricane CityHurricane25,555105 to 2876.1 to 16.8
North Ogden CityNorth Ogden22,000102 to 2076 to 12.1
Grantsville CityGrantsville16,284144 to 2168.4 to 12.6
Mountain Regional Water SsdPark City8,245162 to 2299.5 to 13.4
Enoch City Water SystemCedar City6,500128 to 2887.5 to 16.8
Beaver City Water SystemBeaver3,50050 to 1102.9 to 6.4
Richmond City Water SystemPreston2,96786 to 2815 to 16.4
Jordanelle SsdPayson2,34577 to 4384.5 to 25.6
Wolf Creek Water and Sewer IDEden1,34549 to 2502.9 to 14.6
Highlands Water Company IncMountain Green1,20018 to 2651.1 to 15.5
Summit County Service Area #3Park City1,14030 to 2731.7 to 16
Mountain Springs Water CoNew Harmony660112 to 2166.6 to 12.6
All 29 whose water varies

Source: Utah Department of Environmental Quality, Division of Drinking Water, 175 utilities, results from Jan. 12, 2015 to Sept. 18, 2026, read Oct. 10, 2026. Each sampling point is taken at its median; a figure is typical where every point falls in one band.

Also: 2 utilities’ own water quality reports, read by hand, each named on the utility’s page.

Bands are the U.S. Geological Survey’s, at 17.1 mg/L to the grain. People served is what each utility reports; where one sells water to another, the same people can be counted twice. How hardness is measured here.

Where to go next