Water Hardness in Wisconsin

72 counties — Average 172.3 PPM (Hard)

15
16
9
32
Soft (20.8%) Moderate (22.2%) Hard (12.5%) Very Hard (44.4%)

Wisconsin Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Brown199 PPM
Calumet375 PPM
Columbia280 PPM
Crawford270 PPM
Dodge330 PPM
Door300 PPM
Fond du Lac330 PPM
Grant300 PPM
Green310 PPM
Green Lake222 PPM
Iowa390 PPM
Jefferson310 PPM
+20 more
Wisconsin

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All 72 Counties — By Water Hardness

CountyClassificationHardness
Adams Hard 160 PPM
Ashland Moderate 62 PPM
Barron Moderate 72 PPM
Bayfield Soft 23.6 PPM
Brown Very Hard 199 PPM
Buffalo Hard 180 PPM
Burnett Moderate 68 PPM
Calumet Very Hard 375 PPM
Chippewa Soft 46 PPM
Clark Moderate 74 PPM
Columbia Very Hard 280 PPM
Crawford Very Hard 270 PPM
Dane Soft 58.9 PPM
Dodge Very Hard 330 PPM
Door Very Hard 300 PPM
Douglas Soft 18.7 PPM
Dunn Moderate 110 PPM
Eau Claire Soft 57 PPM
Florence Moderate 92.3 PPM
Fond du Lac Very Hard 330 PPM
Forest Moderate 110 PPM
Grant Very Hard 300 PPM
Green Very Hard 310 PPM
Green Lake Very Hard 222 PPM
Iowa Very Hard 390 PPM
Iron Soft 56 PPM
Jackson Soft 40 PPM
Jefferson Very Hard 310 PPM
Juneau Soft 60 PPM
Kenosha Very Hard 241.5 PPM
Kewaunee Very Hard 340 PPM
La Crosse Hard 150 PPM
Lafayette Very Hard 350 PPM
Langlade Moderate 110 PPM
Lincoln Soft 13.6 PPM
Manitowoc Very Hard 310 PPM
Marathon Soft 51 PPM
Marinette Hard 122.5 PPM
Marquette Very Hard 193 PPM
Menominee Hard 140 PPM
Milwaukee Very Hard 220 PPM
Monroe Moderate 110 PPM
Oconto Hard 160 PPM
Oneida Soft 35 PPM
Outagamie Very Hard 243 PPM
Ozaukee Very Hard 340 PPM
Pepin Moderate 63 PPM
Pierce Very Hard 230 PPM
Polk Moderate 95 PPM
Portage Moderate 120 PPM
Price Soft 45.5 PPM
Racine Very Hard 275 PPM
Richland Very Hard 260 PPM
Rock Very Hard 316 PPM
Rusk Soft 46 PPM
Sauk Very Hard 185 PPM
Sawyer Soft 54 PPM
Shawano Hard 143 PPM
Sheboygan Very Hard 319 PPM
St. Croix Hard 178 PPM
Taylor Moderate 85 PPM
Trempealeau Moderate 68 PPM
Vernon Very Hard 250 PPM
Vilas Soft 39.3 PPM
Walworth Very Hard 257 PPM
Washburn Moderate 75 PPM
Washington Very Hard 320 PPM
Waukesha Very Hard 277 PPM
Waupaca Very Hard 218.5 PPM
Waushara Hard 180 PPM
Winnebago Very Hard 190 PPM
Wood Moderate 79 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in Wisconsin?

Wisconsin has an average water hardness of 172.3 PPM, classified as hard. Out of 72 counties, 15 have soft water, 16 moderately hard, 9 hard, and 32 very hard.

Which Wisconsin counties have the hardest water?

Wisconsin has 32 counties with very hard water (above 180 mg/L). See the county table above for a complete breakdown by hardness level.

How do I check water hardness for my Wisconsin address?

Enter your ZIP code in the search box above to see your area's estimated water hardness, classification, and water utility information.