How hard is the water in Brown County, WI?
14.8 grains per gallon
A softener will pay its way here.
The median hardness measured in Brown County, WI is 253 mg/L as calcium carbonate, which is 14.8 gpg. That is very hard on the USGS scale. It comes from 20 samples at 16 sites between 1990 and 2020, 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 8.8 and 21.3 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 14.8 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 Brown 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 1.5 to 61.3 gpg
The softest single sample on record in Brown County was 25.7 mg/L and the hardest 1,050 mg/L, a 41-fold gap. The top quarter of sites read above 21.3 gpg and the bottom quarter below 8.8 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 14.8 gpg, rivers and lakes 17.2 gpg
20 groundwater samples from 16 wells put the median at 253 mg/L. 570 surface samples from 43 sites put it at 295 mg/L. In Brown County the rivers and lakes come out 2.4 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. 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 323 lb of salt a year (9 bags of 40 lb, about $58), 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 $158 a year.
Sizing at 14.8 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 888 | 24,000 | 108 lb |
| 2 | 1,776 | 24,000 | 216 lb |
| 4 | 3,552 | 32,000 | 432 lb |
| 6 | 5,328 | 40,000 | 648 lb |
Brown County against the rest of Wisconsin
Among the 72 Wisconsin counties with data, Brown County is number 31 of 72 counting from the hardest. Across the whole country it is harder than 68% of counties.
Softest in Wisconsin: Vilas County at 1.4 gpg. Hardest: Calumet County at 28.4 gpg. Closest to Brown County: Richland County (14.9), Green Lake County (15), Shawano County (15).