Table 3. Participation of Dairy Cows in DHI Mastitis Screening
as of January 1, 2004 By State

State Herds Cows Percentage of DHI cows
Alabama 29 5,121 79
Alaska 0 0 0
Arizona 42 58,987 69
Arkansas 46 6,408 99
California 993 878,132 97
Colorado 51 30,326 78
Connecticut 93 10,692 89
Delaware 33 3,873 92
Florida 34 28,083 46
Georgia 138 25,234 53
Hawaii 1 444 100
Idaho 191 127,852 99
Illinois 542 54,008 98
Indiana 401 42,378 97
Iowa 1,053 105,375 98
Kansas 258 29,412 75
Kentucky 209 20,429 94
Louisiana 72 9,899 71
Maine 111 8,910 69
Maryland 363 37,016 99
Massachusetts 93 9,146 95
Michigan 777 133,626 93
Minnesota 2,705 243,130 98
Mississippi 62 9,148 94
Missouri 420 37,923 99
Montana 46 7,123 100
Nebraska 185 28,346 98
Nevada 18 10,184 100
New Hampshire 90 9,164 95
New Jersey 58 5,721 97
New Mexico 28 52,518 99
New York 2,136 267,602 85
North Carolina 190 28,775 88
North Dakota 53 5,246 86
Ohio 965 103,736 96
Oklahoma 89 14,987 96
Oregon 246 54,181 100
Pennsylvania 4,234 312,444 96
Puerto Rico 143 32,927 87
Rhode Island 6 410 100
South Carolina 64 12,959 93
South Dakota 184 23,674 97
Tennessee 210 24,631 91
Texas 185 91,173 84
Utah 176 38,764 99
Vermont 399 47,937 88
Virgin Islands 0 0 0
Virginia 456 61,837 96
Washington 218 65,877 98
West Virginia 52 5,486 100
Wisconsin 6,104 555,857 97
Wyoming 3 723 100
United States 25,255 3,777,834 93 

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