Water Quality in Wisconsin
Water hardness and contaminant data for 9 cities across Wisconsin. Find your city below to see a detailed water quality profile.
9
Cities
213
Avg Hardness (PPM)
312
Hardest City (PPM)
Wisconsin Cities by Water Hardness
| City | Hardness (PPM) | Level | PFAS (ppt) | Source |
|---|---|---|---|---|
| Madison | 312 | Extremely Hard | 5 | Deep groundwater wells |
| Appleton | 304 | Extremely Hard | 3 | Lake Winnebago |
| Eau Claire | 265 | Extremely Hard | 4 | Eau Claire River wells |
| Oshkosh | 256 | Extremely Hard | 5 | Lake Winnebago |
| Waukesha | 196 | Very Hard | 6 | Lake Michigan (new pipeline) |
| Green Bay | 166 | Hard | 7 | Lake Michigan, Fox River |
| Kenosha | 143 | Hard | 5 | Lake Michigan |
| Milwaukee | 140 | Hard | 5 | Lake Michigan |
| Racine | 139 | Hard | 7 | Lake Michigan |