Table 3. Participation of dairy cows in DHI mastitis screening as of January 1, 2012, by State

State Herds Cows Percentage of DHI cows
Alabama 22 4,773 100
Arizona 22 52,797 82
Arkansas 24 3,399 100
California 782 976,215 100
Colorado 34 38,818 83
Connecticut 73 10,824 92
Delaware 27 3,599 100
Florida 21 23,346 44
Georgia 98 26,288 60
Idaho 155 207,873 96
Illinois 367 47,006 100
Indiana 298 49,171 86
Iowa 711 124,599 98
Kansas 158 18,997 81
Kentucky 229 27,764 93
Louisiana 31 5,441 86
Maine 125 12,554 85
Maryland 270 31,661 97
Massachusetts 60 5,086 96
Michigan 615 159,319 89
Minnesota 1,901 247,544 100
Mississippi 28 5,832 100
Missouri 281 32,676 100
Montana 23 4,605 81
Nebraska 103 24,786 97
Nevada 11 7,908 90
New Hampshire 75 9,707 100
New Jersey 39 3,346 93
New Mexico 19 67,886 90
New York 1,648 312,295 91
North Carolina 120 26,448 88
North Dakota 29 6,420 84
Ohio 748 110,402 97
Oklahoma 61 8,473 84
Oregon 170 50,616 100
Pennsylvania 3,871 320,479 95
Puerto Rico 84 18,679 92
Rhode Island 7 461 99
South Carolina 45 10,358 94
South Dakota 107 35,770 99
Tennessee 120 15,743 91
Texas 113 98,941 83
Utah 113 34,202 87
Vermont 327 48,318 92
Virginia 343 57,736 92
Washington 171 83,236 98
West Virginia 32 3,424 97
Wisconsin 4,456 656,950 99
Wyoming 3 879 100
United States 19,170 4,133,650 95 

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