How hard is the water in Antrim County, MI?
9.6 grains per gallon
A softener is worth it here.
The median hardness measured in Antrim County, MI is 165 mg/L as calcium carbonate, which is 9.6 gpg. That is hard on the USGS scale. It comes from 15 samples at 14 sites between 2003 and 2023, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 8.9 and 10.1 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 9.6 gpg a softener is worth getting, mainly to protect the water heater and cut soap use. Get at least two quotes, ask each installer what grain capacity they are fitting, and check it against the sizing table below.
More on sizing a softener for your household.
From 8.2 to 11.7 gpg
The softest single sample on record in Antrim County was 140 mg/L and the hardest 200 mg/L, a 1-fold gap. The top quarter of sites read above 10.1 gpg and the bottom quarter below 8.9 gpg.
Wells 10.2 gpg, rivers and lakes 9.3 gpg
2 groundwater samples from 1 wells put the median at 174 mg/L. 13 surface samples from 13 sites put it at 160 mg/L. In Antrim County the wells come out 0.9 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. 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 211 lb of salt a year (6 bags of 40 lb, about $38), 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 $138 a year.
Sizing at 9.6 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 576 | 24,000 | 70 lb |
| 2 | 1,152 | 24,000 | 140 lb |
| 4 | 2,304 | 24,000 | 280 lb |
| 6 | 3,456 | 32,000 | 420 lb |
Antrim County against the rest of Michigan
Among the 82 Michigan counties with data, Antrim County is number 39 of 82 counting from the hardest. Across the whole country it is harder than 50% of counties.
Softest in Michigan: Luce County at 1.9 gpg. Hardest: Wayne County at 47.4 gpg. Closest to Antrim County: Cheboygan County (9.3), Gladwin County (9.3), Manistee County (9.3).