How hard is the water in Ionia County, MI?

15.2 grains per gallon

A softener will pay its way here.

The median hardness measured in Ionia County, MI is 260 mg/L as calcium carbonate, which is 15.2 gpg. That is very hard on the USGS scale. It comes from 94 samples at 11 sites between 2000 and 2013, drawn from every sampling site in the county, wells and surface water together.

How much it varies here

Half the sites came in between 12 and 17.5 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 15.2 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 5.1 to 21.4 gpg

The softest single sample on record in Ionia County was 87 mg/L and the hardest 366 mg/L, a 4-fold gap. The top quarter of sites read above 17.5 gpg and the bottom quarter below 12 gpg.

What a softener would cost to run

For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 332 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 15.2 gpg

Ionia County against the rest of Michigan

Among the 82 Michigan counties with data, Ionia County is number 19 of 82 counting from the hardest. Across the whole country it is harder than 70% of counties.

Softest in Michigan: Luce County at 1.9 gpg. Hardest: Wayne County at 47.4 gpg. Closest to Ionia County: Menominee County (15.2), Berrien County (15.3), Sanilac County (15).