Table 3. Participation of Dairy Cows in DHI Mastitis Screening
as of January 1, 2005 By State

State Herds Cows Percentage of DHI cows
Alabama 25 4,329 70
Arizona 43 79,563 84
Arkansas 44 5,556 99
California 971 885,842 95
Colorado 51 34,909 88
Connecticut 79 9,743 86
Delaware 33 3,972 92
Florida 32 29,854 49
Georgia 128 22,999 50
Idaho 179 125,834 96
Illinois 509 52,381 99
Indiana 394 41,446 97
Iowa 1,012 110,927 99
Kansas 242 28,436 74
Kentucky 214 19,997 94
Louisiana 67 9,418 78
Maine 111 9,391 73
Maryland 351 36,160 100
Massachusetts 80 8,332 92
Michigan 743 130,962 89
Minnesota 2,565 245,202 98
Mississippi 56 9,207 96
Missouri 393 37,140 99
Montana 43 6,652 96
Nebraska 177 28,534 99
Nevada 16 10,014 100
New Hampshire 87 8,848 96
New Jersey 55 4,968 89
New Mexico 33 61,267 99
New York 2,057 277,775 86
North Carolina 177 27,584 86
North Dakota 47 5,453 85
Ohio 921 107,538 97
Oklahoma 89 14,618 95
Oregon 235 53,602 96
Pennsylvania 4,058 309,196 95
Puerto Rico 126 28,693 80
Rhode Island 6 413 100
South Carolina 57 11,648 88
South Dakota 174 27,088 97
Tennessee 188 22,874 91
Texas 177 78,550 78
Utah 179 40,101 99
Vermont 396 49,793 89
Virginia 439 62,486 97
Washington 213 69,119 97
West Virginia 49 5,383 97
Wisconsin 5,868 563,290 98
Wyoming 5 1,240 100
United States 24,194 3,818,327 93 

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