Water Hardness in Minnesota

87 counties — Average 278.3 PPM (Very Hard)

5
9
8
65
Soft (5.7%) Moderate (10.3%) Hard (9.2%) Very Hard (74.7%)

Minnesota Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Anoka185 PPM
Becker214.5 PPM
Beltrami187 PPM
Big Stone430 PPM
Blue Earth360 PPM
Brown480 PPM
Carver400 PPM
Chippewa410 PPM
Clay350 PPM
Cottonwood370 PPM
Dakota256 PPM
Dodge300 PPM
+53 more
Minnesota

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All 87 Counties — By Water Hardness

CountyClassificationHardness
Aitkin Moderate 110 PPM
Anoka Very Hard 185 PPM
Becker Very Hard 214.5 PPM
Beltrami Very Hard 187 PPM
Benton Hard 146 PPM
Big Stone Very Hard 430 PPM
Blue Earth Very Hard 360 PPM
Brown Very Hard 480 PPM
Carlton Soft 59.4 PPM
Carver Very Hard 400 PPM
Cass Hard 135 PPM
Chippewa Very Hard 410 PPM
Chisago Hard 160 PPM
Clay Very Hard 350 PPM
Clearwater Hard 170 PPM
Cook Soft 19 PPM
Cottonwood Very Hard 370 PPM
Crow Wing Moderate 106 PPM
Dakota Very Hard 256 PPM
Dodge Very Hard 300 PPM
Douglas Very Hard 210 PPM
Faribault Very Hard 364 PPM
Fillmore Very Hard 293 PPM
Freeborn Very Hard 280 PPM
Goodhue Very Hard 240 PPM
Grant Very Hard 540 PPM
Hennepin Very Hard 213 PPM
Houston Very Hard 280 PPM
Hubbard Moderate 102 PPM
Isanti Hard 150 PPM
Itasca Moderate 120 PPM
Jackson Very Hard 420 PPM
Kanabec Moderate 78 PPM
Kandiyohi Very Hard 250 PPM
Kittson Very Hard 260 PPM
Koochiching Soft 43 PPM
Lac qui Parle Very Hard 540 PPM
Lake Soft 21 PPM
Lake of the Woods Soft 48 PPM
Le Sueur Very Hard 380 PPM
Lincoln Very Hard 501 PPM
Lyon Very Hard 568 PPM
Mahnomen Very Hard 240 PPM
Marshall Very Hard 280 PPM
Martin Very Hard 352 PPM
McLeod Very Hard 410 PPM
Meeker Very Hard 320 PPM
Mille Lacs Moderate 100 PPM
Morrison Hard 149.5 PPM
Mower Very Hard 268 PPM
Murray Very Hard 405 PPM
Nicollet Very Hard 440 PPM
Nobles Very Hard 501 PPM
Norman Very Hard 300 PPM
Olmsted Very Hard 304 PPM
Otter Tail Very Hard 233 PPM
Pennington Very Hard 228.5 PPM
Pine Moderate 64 PPM
Pipestone Very Hard 375 PPM
Polk Very Hard 241 PPM
Pope Very Hard 313 PPM
Ramsey Hard 123 PPM
Red Lake Very Hard 287 PPM
Redwood Very Hard 559.5 PPM
Renville Very Hard 490 PPM
Rice Very Hard 326 PPM
Rock Very Hard 350.5 PPM
Roseau Very Hard 230 PPM
Scott Very Hard 360 PPM
Sherburne Hard 170 PPM
Sibley Very Hard 390 PPM
St. Louis Moderate 62 PPM
Stearns Very Hard 250 PPM
Steele Very Hard 340 PPM
Stevens Very Hard 420 PPM
Swift Very Hard 430 PPM
Todd Very Hard 215 PPM
Traverse Very Hard 435 PPM
Wabasha Very Hard 270 PPM
Wadena Very Hard 250 PPM
Waseca Very Hard 335 PPM
Washington Moderate 104 PPM
Watonwan Very Hard 330 PPM
Wilkin Very Hard 240 PPM
Winona Very Hard 230 PPM
Wright Very Hard 240 PPM
Yellow Medicine Very Hard 500 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in Minnesota?

Minnesota has an average water hardness of 278.3 PPM, classified as very hard. Out of 87 counties, 5 have soft water, 9 moderately hard, 8 hard, and 65 very hard.

Which Minnesota counties have the hardest water?

Minnesota has 65 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 Minnesota address?

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