Table 2. Participation of dairy cows in DHI mastitis screening as of January 1, 2022, by State

State Herds Cows Percentage of DHI cows
Alabama 4 558 100
Arizona 11 46,901 94
Arkansas 7 1,261 91
California 492 868,751 100
Colorado 23 48,201 95
Connecticut 40 9,680 98
Delaware 9 1,288 100
Florida 10 17,988 64
Georgia 25 10,243 83
Idaho 88 187,742 100
Illinois 213 38,151 100
Indiana 191 44,084 74
Iowa 341 110,752 98
Kansas 84 21,577 78
Kentucky 159 22,559 99
Louisiana 15 2,673 100
Maine 73 12,443 93
Maryland 165 25,579 99
Massachusetts 50 3,658 97
Michigan 335 174,739 97
Minnesota 907 213,454 99
Mississippi 18 2,877 100
Missouri 152 17,333 100
Montana 13 2,136 72
Nebraska 45 24,318 91
Nevada 6 12,844 94
New Hampshire 49 6,142 92
New Jersey 30 2,690 100
New Mexico 11 44,472 100
New York 1,008 338,035 99
North Carolina 67 22,744 99
North Dakota 14 6,631 82
Ohio 469 91,165 91
Oklahoma 30 4,149 89
Oregon 78 37,081 99
Pennsylvania 2,531 271,313 97
Rhode Island 3 177 100
South Carolina 17 4,319 91
South Dakota 45 43,494 100
Tennessee 34 5,313 88
Texas 65 228,658 98
Utah 60 24,358 80
Vermont 202 45,590 97
Virginia 158 33,176 96
Washington 61 68,372 93
West Virginia 9 786 70
Wisconsin 2,307 673,928 99
United States 10,724 3,874,383 97 

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