How hard is the water in Douglas County, NE?
15.3 grains per gallon
A softener will pay its way here.
The median hardness measured in Douglas County, NE is 262 mg/L as calcium carbonate, which is 15.3 gpg. That is very hard on the USGS scale. It comes from 86 samples at 21 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 12.6 and 19.2 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 15.3 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 10.6 to 39.2 gpg
The softest single sample on record in Douglas County was 182 mg/L and the hardest 670.5 mg/L, a 4-fold gap. The top quarter of sites read above 19.2 gpg and the bottom quarter below 12.6 gpg.
Wells 15.3 gpg, rivers and lakes 16.4 gpg
86 groundwater samples from 21 wells put the median at 262 mg/L. 955 surface samples from 23 sites put it at 280 mg/L. In Douglas County the rivers and lakes come out 1.1 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 334 lb of salt a year (9 bags of 40 lb, about $60), 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 $160 a year.
Sizing at 15.3 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 918 | 24,000 | 112 lb |
| 2 | 1,836 | 24,000 | 223 lb |
| 4 | 3,672 | 32,000 | 447 lb |
| 6 | 5,508 | 40,000 | 670 lb |
Douglas County against the rest of Nebraska
Among the 89 Nebraska counties with data, Douglas County is number 42 of 89 counting from the hardest. Across the whole country it is harder than 70% of counties.
Softest in Nebraska: Blaine County at 2.1 gpg. Hardest: Cedar County at 36.5 gpg. Closest to Douglas County: Pawnee County (15.4), Otoe County (15.2), Sarpy County (15.2).