How hard is the water in Beadle County, SD?
10.5 grains per gallon
A softener will pay its way here.
The median hardness measured in Beadle County, SD is 180 mg/L as calcium carbonate, which is 10.5 gpg. That is hard on the USGS scale. It comes from 909 samples at 42 sites between 1990 and 2014, 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 9 and 13.4 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 10.5 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 Beadle 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 4.8 to 132.6 gpg
The softest single sample on record in Beadle County was 82.4 mg/L and the hardest 2,270 mg/L, a 28-fold gap. The top quarter of sites read above 13.4 gpg and the bottom quarter below 9 gpg.
Wells 10.5 gpg, rivers and lakes 26.9 gpg
909 groundwater samples from 42 wells put the median at 179.8 mg/L. 137 surface samples from 15 sites put it at 461 mg/L. In Beadle County the rivers and lakes come out 16.4 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. A utility here that draws from the aquifer 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 229 lb of salt a year (6 bags of 40 lb, about $41), 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 $141 a year.
Sizing at 10.5 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 630 | 24,000 | 77 lb |
| 2 | 1,260 | 24,000 | 153 lb |
| 4 | 2,520 | 24,000 | 307 lb |
| 6 | 3,780 | 32,000 | 460 lb |
Beadle County against the rest of South Dakota
Among the 55 South Dakota counties with data, Beadle County is number 47 of 55 counting from the hardest. Across the whole country it is harder than 53% of counties.
Softest in South Dakota: Dewey County at 0.5 gpg. Hardest: Hanson County at 84.7 gpg. Closest to Beadle County: Brule County (10.8), Tripp County (9.9), Gregory County (11.1).