Table 3. Participation of dairy cows in DHI mastitis screening as of January 1, 2013, by State

State Herds Cows Percentage of DHI cows
Alabama 22 4,579 100
Arizona 22 44,558 86
Arkansas 20 3,215 98
California 744 945,217 100
Colorado 33 45,354 98
Connecticut 70 12,294 100
Delaware 27 3,685 100
Florida 31 29,883 64
Georgia 98 26,005 61
Idaho 148 221,725 97
Illinois 358 48,995 100
Indiana 295 47,434 86
Iowa 660 122,121 99
Kansas 151 17,973 82
Kentucky 223 26,175 93
Louisiana 35 4,913 76
Maine 122 12,789 81
Maryland 270 32,737 99
Massachusetts 66 5,770 96
Michigan 595 162,984 87
Minnesota 1,793 246,227 99
Mississippi 30 5,859 100
Missouri 273 34,059 100
Montana 23 4,836 78
Nebraska 94 23,486 93
Nevada 10 7,130 100
New Hampshire 73 9,478 100
New Jersey 42 3,070 89
New Mexico 16 52,790 87
New York 1,635 318,476 93
North Carolina 114 23,198 91
North Dakota 22 5,608 85
Ohio 732 112,521 96
Oklahoma 51 6,981 79
Oregon 162 50,418 100
Pennsylvania 3,761 316,516 95
Puerto Rico 83 16,706 96
Rhode Island 8 462 100
South Carolina 43 10,191 94
South Dakota 99 37,544 99
Tennessee 107 14,540 94
Texas 105 105,003 89
Utah 110 35,910 87
Vermont 326 49,842 95
Virginia 338 58,249 93
Washington 173 85,047 98
West Virginia 33 3,530 100
Wisconsin 4,331 676,226 99
Wyoming 2 831 100
United States 18,579 4,133,140 95 

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