How hard is the water in Emmet County, IA?
31.8 grains per gallon
A softener will pay its way here.
The median hardness measured in Emmet County, IA is 545 mg/L as calcium carbonate, which is 31.8 gpg. That is very hard on the USGS scale. It comes from 26 samples at 6 sites between 1990 and 2018, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 17.5 and 38.3 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 31.8 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.
More on sizing a softener for your household.
From 10.5 to 50.5 gpg
The softest single sample on record in Emmet County was 180 mg/L and the hardest 865 mg/L, a 5-fold gap. The top quarter of sites read above 38.3 gpg and the bottom quarter below 17.5 gpg.
Wells 36.2 gpg, rivers and lakes 11.7 gpg
22 groundwater samples from 4 wells put the median at 620 mg/L. 4 surface samples from 2 sites put it at 200 mg/L. In Emmet County the wells come out 24.5 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 48,000-grain unit covers a week between regenerations. Expect about 695 lb of salt a year (18 bags of 40 lb, about $125), 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 $225 a year.
Sizing at 31.8 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,908 | 24,000 | 232 lb |
| 2 | 3,816 | 32,000 | 464 lb |
| 4 | 7,632 | 64,000 | 929 lb |
| 6 | 11,448 | twin tank | 1,393 lb |
Emmet County against the rest of Iowa
Among the 93 Iowa counties with data, Emmet County is number 6 of 93 counting from the hardest. Across the whole country it is harder than 95% of counties.
Softest in Iowa: Taylor County at 8.2 gpg. Hardest: Pocahontas County at 45.3 gpg. Closest to Emmet County: Plymouth County (31.5), Palo Alto County (32.4), Lyon County (31.2).