Michigan vs Wisconsin: Whose Tap Water Is Harder?
Water Hardness in Michigan (140 PPM) vs Wisconsin (140 PPM) — a 0% gap between neighbors, explained with July 2026 data.
Michigan and Wisconsin share a border, but for water hardness they don't share much else: Michigan averages 140 PPM (rank #32 of 51) and Wisconsin averages 140 PPM (rank #33) as of July 2026 — a 0% gap between neighbors.
| Michigan | Wisconsin | U.S. benchmark | |
|---|---|---|---|
| Average hardness | 140 PPM | 140 PPM | 120 PPM |
Michigan in context
Michigan averages 140 PPM — "hard" on the USGS scale and 17% harder than the national average of 120 PPM (rank #32 of 51, 1 = softest). Expect visible scale and spotting; a softener starts paying for itself in appliance life at this level.
Wisconsin in context
Wisconsin averages 140 PPM — "hard" on the USGS scale and 17% harder than the national average of 120 PPM (rank #33 of 51, 1 = softest). Expect visible scale and spotting; a softener starts paying for itself in appliance life at this level.
Full local breakdowns: Michigan · Wisconsin · all states ranked.
State averages hide huge local swings. A certified home water test kit tells you your exact hardness and what's dissolved in your water — before you spend a dollar on treatment.
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