How hard is the water in Sharp County, AR?
16 grains per gallon
A softener will pay its way here.
The median hardness measured in Sharp County, AR is 274 mg/L as calcium carbonate, which is 16 gpg. That is very hard on the USGS scale. It comes from 82 samples at 31 sites between 1991 and 2026, 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 11.9 and 18.5 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 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 2.0 to 25.6 gpg
The softest single sample on record in Sharp County was 34.2 mg/L and the hardest 438 mg/L, a 13-fold gap. The top quarter of sites read above 18.5 gpg and the bottom quarter below 11.9 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 16 gpg, rivers and lakes 11.8 gpg
82 groundwater samples from 31 wells put the median at 273.5 mg/L. 498 surface samples from 22 sites put it at 202 mg/L. In Sharp County the wells come out 4.2 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 349 lb of salt a year (9 bags of 40 lb, about $63), 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 $163 a year.
Sizing at 16 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 960 | 24,000 | 117 lb |
| 2 | 1,920 | 24,000 | 234 lb |
| 4 | 3,840 | 32,000 | 467 lb |
| 6 | 5,760 | 48,000 | 701 lb |
Sharp County against the rest of Arkansas
Among the 75 Arkansas counties with data, Sharp County is number 10 of 75 counting from the hardest. Across the whole country it is harder than 72% of counties.
Softest in Arkansas: Hempstead County at 0.1 gpg. Hardest: Prairie County at 23.9 gpg. Closest to Sharp County: Cross County (16.9), Lonoke County (14.8), Marion County (14.8).