Utah utilities whose water varies in hardness.

Water in more than one band, depending on where or when it was sampled: each is given as its range, softest to hardest. 29 utilities serving 1.4 million people as they report it, largest first.

All 29, by people served

Utah utilities whose water varies in hardness, 1 to 29
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Salt Lake City Water System	Salt Lake City	383,612	158 to 568	9.3 to 33.2
Provo City	Provo	116,288	130 to 299	7.6 to 17.5
St George City Water System	St George City	105,240	46 to 370	2.7 to 21.6
Sandy City Water System	Lehi	99,750	133 to 181	7.8 to 10.6
Jordan Valley Wcd	West Jordan	99,335	100 to 354	5.8 to 20.7
Lehi City	Lehi	93,446	126 to 248	7.4 to 14.5
Ogden City Water System	Brigham City	87,267	141 to 315	8.2 to 18.4
Taylorsville - Bennion ID	Riverton	67,098	155 to 443	9 to 25.9
Eagle Mountain City	Eagle Mountain	61,266	169 to 593	9.9 to 34.7
Washington City	Hurricane	45,865	137 to 200	8 to 11.7
Tooele City Water System	Tooele	41,770	158 to 335	9.2 to 19.6
Pleasant Grove City	Orem	40,000	126 to 261	7.3 to 15.2
Murray City Water System	West Jordan	38,723	169 to 195	9.9 to 11.4
Hurricane City	Hurricane	25,555	105 to 287	6.1 to 16.8
North Ogden City	North Ogden	22,000	102 to 207	6 to 12.1
Grantsville City	Grantsville	16,284	144 to 216	8.4 to 12.6
Mountain Regional Water Ssd	Park City	8,245	162 to 229	9.5 to 13.4
Enoch City Water System	Cedar City	6,500	128 to 288	7.5 to 16.8
Beaver City Water System	Beaver	3,500	50 to 110	2.9 to 6.4
Richmond City Water System	Preston	2,967	86 to 281	5 to 16.4
Jordanelle Ssd	Payson	2,345	77 to 438	4.5 to 25.6
Wolf Creek Water and Sewer ID	Eden	1,345	49 to 250	2.9 to 14.6
Highlands Water Company Inc	Mountain Green	1,200	18 to 265	1.1 to 15.5
Summit County Service Area #3	Park City	1,140	30 to 273	1.7 to 16
Mountain Springs Water Co	New Harmony	660	112 to 216	6.6 to 12.6
Torrey Town Water System	Torrey	550	58 to 83	3.4 to 4.9
Washington County Wcd - Sand Hollow	St George	425	172 to 375	10.1 to 21.9
Washington County Wcd - Cottam	St George	130	167 to 187	9.8 to 10.9
Canyon Meadows Mutual Water Company	Provo	85	42 to 213	2.4 to 12.5

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.

All 29, by people served

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