Minnesota water hardness

Understanding Minnesota

Why local comparisons matter here

Minnesota's water landscape includes major rivers and lakes, glacial aquifers, and deeper bedrock sources from the Twin Cities to prairie and northern forest regions.

In this index, very hard is the largest category, covering 300 of 319 profiles with hardness data. The state median is 318 PPM, but the full indexed range is 46.1–716 PPM.