How hard is the water in Winneshiek County, IA?
18.1 grains per gallon
A softener will pay its way here.
The median hardness measured in Winneshiek County, IA is 310 mg/L as calcium carbonate, which is 18.1 gpg. That is very hard on the USGS scale. It comes from 23 samples at 9 sites between 1990 and 2013, 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 17.5 and 20.4 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: medium (how it is measured).
What to do next
At 18.1 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 14.6 to 23.4 gpg
The softest single sample on record in Winneshiek County was 250 mg/L and the hardest 400 mg/L, a 2-fold gap. The top quarter of sites read above 20.4 gpg and the bottom quarter below 17.5 gpg.
Wells 18.1 gpg, rivers and lakes 16.9 gpg
23 groundwater samples from 9 wells put the median at 310 mg/L. 1 surface samples from 1 sites put it at 290 mg/L. In Winneshiek County the wells come out 1.2 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. 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 396 lb of salt a year (10 bags of 40 lb, about $71), 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 $171 a year.
Sizing at 18.1 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,086 | 24,000 | 132 lb |
| 2 | 2,172 | 24,000 | 264 lb |
| 4 | 4,344 | 32,000 | 529 lb |
| 6 | 6,516 | 48,000 | 793 lb |
Winneshiek County against the rest of Iowa
Among the 93 Iowa counties with data, Winneshiek County is number 61 of 93 counting from the hardest. Across the whole country it is harder than 79% of counties.
Softest in Iowa: Taylor County at 8.2 gpg. Hardest: Pocahontas County at 45.3 gpg. Closest to Winneshiek County: Guthrie County (18.1), Jefferson County (18.4), Benton County (18.6).