Utah utilities with very hard water.
Above 180 mg/L (10.5 grains per gallon). 121 utilities serving 843,800 people as they report it, largest first.
All 121, by people served
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
- Utah hardnessEvery band in the state, with the largest utilities in each.Utah water hardness
- Softeners comparedCertified softeners and what each costs over five years, salt included, at your water’s hardness.Softeners, salt included
- Hardness across the USEvery state with hardness results, and the hardest and softest large utilities.US water hardness