How hard is the water in Kenosha County, WI?
15.3 grains per gallon
A softener will pay its way here.
The median hardness measured in Kenosha County, WI is 262 mg/L as calcium carbonate, which is 15.3 gpg. That is very hard on the USGS scale. It comes from 159 samples at 24 sites between 1990 and 2024, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 13.8 and 21.2 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 7.0 to 28.6 gpg
The softest single sample on record in Kenosha County was 120 mg/L and the hardest 490 mg/L, a 4-fold gap. The top quarter of sites read above 21.2 gpg and the bottom quarter below 13.8 gpg.
Wells 26.7 gpg, rivers and lakes 14.8 gpg
3 groundwater samples from 3 wells put the median at 457 mg/L. 156 surface samples from 21 sites put it at 253 mg/L. In Kenosha County the wells come out 11.9 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 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 |
Kenosha County against the rest of Wisconsin
Among the 72 Wisconsin counties with data, Kenosha County is number 26 of 72 counting from the hardest. Across the whole country it is harder than 70% of counties.
Softest in Wisconsin: Vilas County at 1.4 gpg. Hardest: Calumet County at 28.4 gpg. Closest to Kenosha County: Vernon County (15.2), Shawano County (15), Oconto County (15.5).