How hard is the water in Utah County, UT?
16.8 grains per gallon
A softener will pay its way here.
The median hardness measured in Utah County, UT is 287 mg/L as calcium carbonate, which is 16.8 gpg. That is very hard on the USGS scale. It comes from 430 samples at 142 sites between 1990 and 2021, drawn from groundwater wells, which is what most taps and private wells in the county draw on.
How much it varies here
Half the sites came in between 12.7 and 21.6 gpg. The whole middle of that range gives the same answer, so a test of your own tap is unlikely to change it. Confidence in the county figure: high (how it is measured).
What to do next
At 16.8 gpg a softener pays its way here. Before you buy, check the quoted unit's grain capacity against the sizing table below, and ask whether it regenerates on demand, which uses less salt than a timer. Call your utility for its own report if you are on city water.
More on sizing a softener for your household.
From 4.9 to 183.3 gpg
The softest single sample on record in Utah County was 84.6 mg/L and the hardest 3,138.2 mg/L, a 37-fold gap. The top quarter of sites read above 21.6 gpg and the bottom quarter below 12.7 gpg.
Wells 16.8 gpg, rivers and lakes 15.2 gpg
430 groundwater samples from 142 wells put the median at 287.1 mg/L. 6,295 surface samples from 226 sites put it at 260.4 mg/L. In Utah County the wells come out 1.6 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. The two sources are close, so the county figure should hold whichever one your tap is on.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 366 lb of salt a year (10 bags of 40 lb, about $66), and roughly 2,346 gallons of regeneration water. Installed, most units run $1,000 to $4,500; spread over 15 years with salt, that is about $166 a year.
Sizing at 16.8 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,008 | 24,000 | 123 lb |
| 2 | 2,016 | 24,000 | 245 lb |
| 4 | 4,032 | 32,000 | 491 lb |
| 6 | 6,048 | 48,000 | 736 lb |
Utah County against the rest of Utah
Among the 29 Utah counties with data, Utah County is number 14 of 29 counting from the hardest. Across the whole country it is harder than 75% of counties.
Softest in Utah: Davis County at 9 gpg. Hardest: Emery County at 151.3 gpg. Closest to Utah County: Sevier County (16.6), Grand County (17.5), Morgan County (17.9).