How hard is the water in Keith County, NE?
18.9 grains per gallon
A softener will pay its way here.
The median hardness measured in Keith County, NE is 324 mg/L as calcium carbonate, which is 18.9 gpg. That is very hard on the USGS scale. It comes from 25 samples at 8 sites between 1994 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 7.9 and 61 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: medium (how it is measured).
What to do next
At 18.9 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 Keith 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 7.5 to 92.9 gpg
The softest single sample on record in Keith County was 129 mg/L and the hardest 1,590 mg/L, a 12-fold gap. The top quarter of sites read above 61 gpg and the bottom quarter below 7.9 gpg.
Wells 18.9 gpg, rivers and lakes 19.5 gpg
25 groundwater samples from 8 wells put the median at 323.5 mg/L. 8 surface samples from 3 sites put it at 333 mg/L. In Keith County the rivers and lakes come out 0.6 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. The two sources are close, so the county figure should hold whichever one your tap is on.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 413 lb of salt a year (11 bags of 40 lb, about $74), 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 $174 a year.
Sizing at 18.9 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,134 | 24,000 | 138 lb |
| 2 | 2,268 | 24,000 | 276 lb |
| 4 | 4,536 | 32,000 | 552 lb |
| 6 | 6,804 | 48,000 | 828 lb |
Keith County against the rest of Nebraska
Among the 89 Nebraska counties with data, Keith County is number 17 of 89 counting from the hardest. Across the whole country it is harder than 81% of counties.
Softest in Nebraska: Blaine County at 2.1 gpg. Hardest: Cedar County at 36.5 gpg. Closest to Keith County: Greeley County (19), Platte County (18.8), Scotts Bluff County (18.8).