How hard is the water in Sevier County, UT?
16.6 grains per gallon
A softener will pay its way here.
The median hardness measured in Sevier County, UT is 284 mg/L as calcium carbonate, which is 16.6 gpg. That is very hard on the USGS scale. It comes from 82 samples at 15 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 5.2 and 24.5 gpg. That spread crosses a decision line, so some homes here land on a different answer. A $10 test strip on your own tap settles it. Confidence in the county figure: high (how it is measured).
What to do next
At 16.6 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. Because Sevier County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on sizing a softener for your household.
From 2.3 to 86.0 gpg
The softest single sample on record in Sevier County was 39.8 mg/L and the hardest 1,472.1 mg/L, a 37-fold gap. The top quarter of sites read above 24.5 gpg and the bottom quarter below 5.2 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 16.6 gpg, rivers and lakes 6.1 gpg
82 groundwater samples from 15 wells put the median at 284 mg/L. 1,636 surface samples from 80 sites put it at 104.2 mg/L. In Sevier County the wells come out 10.5 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 362 lb of salt a year (10 bags of 40 lb, about $65), 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 $165 a year.
Sizing at 16.6 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 996 | 24,000 | 121 lb |
| 2 | 1,992 | 24,000 | 242 lb |
| 4 | 3,984 | 32,000 | 485 lb |
| 6 | 5,976 | 48,000 | 727 lb |
Sevier County against the rest of Utah
Among the 29 Utah counties with data, Sevier County is number 15 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 Sevier County: Utah County (16.8), Grand County (17.5), Cache County (15.5).