Table 3. Participation of Dairy Cows in DHI Mastitis Screening
as of January 1, 2006 By State

State Herds Cows Percentage of DHI cows
Alabama 31 5,023 86
Arizona 43 80,636 90
Arkansas 37 5,406 99
California 955 909,255 96
Colorado 42 27,905 73
Connecticut 82 9,854 90
Delaware 24 2,868 83
Florida 26 31,064 54
Georgia 126 22,261 52
Idaho 186 162,857 96
Illinois 486 51,032 98
Indiana 393 46,514 98
Iowa 968 112,657 98
Kansas 218 26,081 75
Kentucky 205 20,574 96
Louisiana 62 9,243 82
Maine 111 10,575 83
Maryland 346 35,416 98
Massachusetts 82 8,685 95
Michigan 735 133,482 91
Minnesota 2,459 243,036 99
Mississippi 42 7,657 92
Missouri 388 36,973 99
Montana 41 5,990 81
Nebraska 168 27,585 99
Nevada 16 10,317 100
New Hampshire 88 9,399 100
New Jersey 58 5,831 94
New Mexico 28 60,172 96
New York 2,031 280,941 87
North Carolina 173 27,540 92
North Dakota 44 5,374 87
Ohio 860 101,158 95
Oklahoma 85 14,489 95
Oregon 226 49,605 96
Pennsylvania 4,007 307,169 95
Puerto Rico 124 28,265 87
Rhode Island 5 338 100
South Carolina 56 11,706 91
South Dakota 156 27,854 97
Tennessee 175 22,401 92
Texas 177 86,933 80
Utah 172 42,625 99
Vermont 392 50,428 90
Virginia 413 60,040 96
Washington 215 70,566 98
West Virginia 44 4,572 88
Wisconsin 5,702 568,044 97
Wyoming 4 725 100
United States 23,507 3,879,121 93 

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