How hard is the water in Box Elder County, UT?
25.2 grains per gallon
A softener will pay its way here.
The median hardness measured in Box Elder County, UT is 431 mg/L as calcium carbonate, which is 25.2 gpg. That is very hard on the USGS scale. It comes from 300 samples at 63 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 15.9 and 36 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 25.2 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 0.5 to 158.3 gpg
The softest single sample on record in Box Elder County was 8.6 mg/L and the hardest 2,710 mg/L, a 315-fold gap. The top quarter of sites read above 36 gpg and the bottom quarter below 15.9 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 25.2 gpg, rivers and lakes 16.5 gpg
300 groundwater samples from 63 wells put the median at 431 mg/L. 2,242 surface samples from 101 sites put it at 282.8 mg/L. In Box Elder County the wells come out 8.7 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 32,000-grain unit covers a week between regenerations. Expect about 550 lb of salt a year (14 bags of 40 lb, about $99), 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 $199 a year.
Sizing at 25.2 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,512 | 24,000 | 184 lb |
| 2 | 3,024 | 24,000 | 368 lb |
| 4 | 6,048 | 48,000 | 736 lb |
| 6 | 9,072 | 64,000 | 1,104 lb |
Box Elder County against the rest of Utah
Among the 29 Utah counties with data, Box Elder County is number 5 of 29 counting from the hardest. Across the whole country it is harder than 92% of counties.
Softest in Utah: Davis County at 9 gpg. Hardest: Emery County at 151.3 gpg. Closest to Box Elder County: Salt Lake County (25.9), Uintah County (27.9), Juab County (28.5).