Water Hardness in South Dakota

66 counties — Average 445.5 PPM (Very Hard)

2
6
58
Soft (0.0%) Moderate (3.0%) Hard (9.1%) Very Hard (87.9%)

South Dakota Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Aurora210 PPM
Beadle320 PPM
Bon Homme600 PPM
Brookings460 PPM
Brown350 PPM
Brule1300 PPM
Buffalo604 PPM
Butte710 PPM
Campbell480 PPM
Charles Mix635 PPM
Clark700 PPM
Clay820 PPM
+46 more
South Dakota

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All 66 Counties — By Water Hardness

CountyClassificationHardness
Aurora Very Hard 210 PPM
Beadle Very Hard 320 PPM
Bennett Hard 137 PPM
Bon Homme Very Hard 600 PPM
Brookings Very Hard 460 PPM
Brown Very Hard 350 PPM
Brule Very Hard 1300 PPM
Buffalo Very Hard 604 PPM
Butte Very Hard 710 PPM
Campbell Very Hard 480 PPM
Charles Mix Very Hard 635 PPM
Clark Very Hard 700 PPM
Clay Very Hard 820 PPM
Codington Very Hard 425 PPM
Corson Very Hard 220 PPM
Custer Very Hard 230 PPM
Davison Very Hard 412.8 PPM
Day Very Hard 580 PPM
Deuel Very Hard 460 PPM
Dewey Very Hard 282.9 PPM
Douglas Very Hard 245 PPM
Edmunds Very Hard 310 PPM
Fall River Very Hard 780 PPM
Faulk Hard 155 PPM
Grant Very Hard 510.4 PPM
Gregory Very Hard 260 PPM
Haakon Very Hard 640 PPM
Hamlin Very Hard 460 PPM
Hand Very Hard 430 PPM
Hanson Very Hard 600 PPM
Harding Moderate 101 PPM
Hughes Very Hard 260 PPM
Hutchinson Very Hard 708 PPM
Hyde Very Hard 360 PPM
Jackson Moderate 120 PPM
Jerauld Very Hard 580 PPM
Jones Very Hard 210 PPM
Kingsbury Very Hard 531 PPM
Lake Very Hard 920 PPM
Lawrence Very Hard 273.9 PPM
Lincoln Very Hard 520 PPM
Lyman Very Hard 228 PPM
Marshall Very Hard 512.5 PPM
McCook Very Hard 700 PPM
McPherson Very Hard 340 PPM
Meade Very Hard 830 PPM
Mellette Hard 140 PPM
Miner Very Hard 620 PPM
Minnehaha Very Hard 433.1 PPM
Moody Very Hard 510 PPM
Oglala Lakota Very Hard 200 PPM
Pennington Very Hard 250 PPM
Perkins Hard 140 PPM
Potter Very Hard 380 PPM
Roberts Very Hard 580.1 PPM
Sanborn Very Hard 360 PPM
Spink Very Hard 415.5 PPM
Stanley Very Hard 516.8 PPM
Sully Very Hard 340 PPM
Todd Hard 140 PPM
Tripp Hard 174 PPM
Turner Very Hard 773.8 PPM
Union Very Hard 490 PPM
Walworth Very Hard 430 PPM
Yankton Very Hard 240 PPM
Ziebach Very Hard 747.7 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in South Dakota?

South Dakota has an average water hardness of 445.5 PPM, classified as very hard. Out of 66 counties, 0 have soft water, 2 moderately hard, 6 hard, and 58 very hard.

Which South Dakota counties have the hardest water?

South Dakota has 58 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 South Dakota address?

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