How hard is the water in Wasatch County, UT?
15.6 grains per gallon
A softener will pay its way here.
The median hardness measured in Wasatch County, UT is 266 mg/L as calcium carbonate, which is 15.6 gpg. That is very hard on the USGS scale. It comes from 300 samples at 37 sites between 1990 and 2023, 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 11.8 and 19.9 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 15.6 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 5.5 to 135.6 gpg
The softest single sample on record in Wasatch County was 94.3 mg/L and the hardest 2,320.7 mg/L, a 25-fold gap. The top quarter of sites read above 19.9 gpg and the bottom quarter below 11.8 gpg.
Wells 15.6 gpg, rivers and lakes 10.3 gpg
300 groundwater samples from 37 wells put the median at 266.2 mg/L. 5,788 surface samples from 153 sites put it at 175.7 mg/L. In Wasatch County the wells come out 5.3 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. A utility here that draws from the river can deliver noticeably different water from a private well next door.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 340 lb of salt a year (9 bags of 40 lb, about $61), 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 $161 a year.
Sizing at 15.6 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 936 | 24,000 | 114 lb |
| 2 | 1,872 | 24,000 | 228 lb |
| 4 | 3,744 | 32,000 | 456 lb |
| 6 | 5,616 | 40,000 | 683 lb |
Wasatch County against the rest of Utah
Among the 29 Utah counties with data, Wasatch County is number 16 of 29 counting from the hardest. Across the whole country it is harder than 71% of counties.
Softest in Utah: Davis County at 9 gpg. Hardest: Emery County at 151.3 gpg. Closest to Wasatch County: Cache County (15.5), Iron County (15.4), Washington County (15.1).