Table 3. Participation of dairy cows in DHI mastitis screening as of January 1, 2010, by State

State Herds Cows Percentage of DHI cows
Alabama 22 3,623 88
Arizona 22 47,885 97
Arkansas 23 3,910 98
California 830 960,802 100
Colorado 35 34,755 83
Connecticut 70 9,982 91
Delaware 27 3,370 95
Florida 17 18,078 37
Georgia 90 21,202 52
Idaho 156 192,462 96
Illinois 395 46,632 99
Indiana 333 40,616 89
Iowa 761 127,250 98
Kansas 175 22,879 93
Kentucky 198 24,097 97
Louisiana 37 6,118 76
Maine 116 12,043 85
Maryland 289 33,509 99
Massachusetts 74 6,447 96
Michigan 629 144,221 87
Minnesota 2,051 250,179 99
Mississippi 31 6,007 92
Missouri 301 36,609 100
Montana 26 5,506 96
Nebraska 119 23,822 87
Nevada 14 9,658 100
New Hampshire 79 9,934 98
New Jersey 45 3,882 91
New Mexico 23 70,993 89
New York 1,673 293,168 90
North Carolina 125 23,045 89
North Dakota 33 5,919 81
Ohio 754 111,580 97
Oklahoma 58 7,907 93
Oregon 186 51,703 83
Pennsylvania 3,988 323,274 95
Puerto Rico 105 22,962 96
Rhode Island 9 530 100
South Carolina 46 10,395 92
South Dakota 119 34,832 94
Tennessee 122 15,633 88
Texas 124 82,845 73
Utah 116 41,591 100
Vermont 321 45,589 91
Virginia 348 54,586 92
Washington 176 64,396 96
West Virginia 33 3,878 96
Wisconsin 4,726 623,408 97
Wyoming 2 725 100
United States 20,052 3,994,437 94 

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