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Home > Protecting Our Lands & Waters > Water Protection > Testing Private Well Water for Nitrate > nitrateclinicresults

Summary of Results from Nitrate Clinics held in 2011


County Number
of Samples
Minimum Maximum Median Percentage of Nitrate
Samples Over 10 mg/L
Aitkin NA NA NA NA NA
Becker 11 0 27.0 0.5 9.1
Benton 45 0 42.6 0.4 8.9
Carver 30 0 1.7 0.2 0.0
Chippewa 10 0 11.7 1.1 10.0
Chisago 39 0 12.3 0.0 2.6
Clearwater 18 0 9.0 0.0 0.0
Cook 75 0 2.6 0.0 0.0
Crow Wing 203 0 15.5 0.1 1.1
Dakota 309 0 36.0 0.4 14.9
Douglas 75 0 13.7 0.2 1.3
Freeborn 16 0 6.0 0.2 0.0
Grant 41 0 6.7 0.1 0.0
Isanti 75 0 13.2 0.0 1.3
Itasca 51 0 2.0 0.0 0.0
Kanabec 67 0 20.9 0.0 7.5
Kandiyohi 42 0 18.0 0.0 4.8
Kittson 7 0 6.9 0.2 0.0
Koochiching 75 0 6.9 0.0 0.0
Lac Qui Parle 53 0 13.7 0.0 11.3
Lyon 7 0 1.7 0.0 0.0
Mahnomen 6 0 0.6 0.0 0.0
Mille Lacs 54 0 10.4 0.0 1.9
Morrison 46 0 21.0 1.2 16.0
Murray 40 0 25.6 0.0 12.5
Nicollet 75 0 25.9 0.1 4.0
Nobles 25 0 72.0 5.1 48.0
Otter Tail 70 0 28.0 0.0 10.0
Pipestone 44 0 10.4 3.7 27.3
Ramsey 4 0 4.4 1.0 0.0
Red Lake 17 0 0.1 0.1 0.0
Rice 70 0 12.6 0.1 2.9
Rock 12 0.9 20.0 7.3 30.0
Roseau 17 0 1.7 0.0 0.0
Scott 36 0 15.2 0.0 5.6
Sibley 12 0 0.0 0.0 0.0
Stearns 74 0 31.4 0.7 12.2
Traverse 31 0 11.5 0.2 6.5
Wadena 20 0 22.7 1.0 10.0
Waseca 50 0 8.0 0.0 0.0
Washington 141 0 15.7 2.8 3.5
Overall 2093 0.00 72 0.7 6.6