Table 3. Participation of Dairy Cows in DHI Mastitis Screening as of
January 1, 2003, by State.

State Herds Cows Percentage of DHI cows
Alabama 34 6,050 81
Alaska 0 0 0
Arizona 44 61,285 72
Arkansas 60 8,046 96
California 1,034 877,998 96
Colorado 57 35,829 80
Connecticut 93 10,705 88
Delaware 34 3,865 89
Florida 33 27,935 44
Georgia 151 30,545 57
Hawaii 1 548 27
Idaho 191 127,551 99
Illinois 576 54,104 99
Indiana 437 40,979 89
Iowa 1,108 103,652 99
Kansas 272 46,637 95
Kentucky 240 23,006 94
Louisiana 87 11,566 75
Maine 122 10,549 76
Maryland 391 40,500 98
Massachusetts 100 9,740 91
Michigan 831 134,234 93
Minnesota 2,900 258,284 98
Mississippi 61 9,028 85
Missouri 446 40,503 99
Montana 55 8,357 100
Nebraska 207 29,732 98
Nevada 17 9,889 100
New Hampshire 97 9,380 94
New Jersey 64 6,336 95
New Mexico 31 56,706 99
New York 2,265 283,383 87
North Carolina 203 31,822 86
North Dakota 58 6,423 100
Ohio 991 100,229 92
Oklahoma 94 15,342 96
Oregon 258 71,284 100
Pennsylvania 4,418 318,032 94
Puerto Rico 151 36,669 88
Rhode Island 5 334 82
South Carolina 71 13,730 92
South Dakota 200 24,702 96
Tennessee 222 26,611 87
Texas 203 101,182 85
Utah 192 40,917 99
Vermont 414 49,994 86
Virgin Islands 0 0 0
Virginia 484 67,323 95
Washington 235 70,666 98
West Virginia 56 6,447 97
Wisconsin 6,472 573,914 99
Wyoming 3 770 100
United States 26,769 3,933,313 93 

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