Table 3. Participation of dairy cows in DHI mastitis screening as of January 1, 2011, by State

State Herds Cows Percentage of DHI cows
Alabama 23 4,208 99
Arizona 22 51,810 95
Arkansas 23 3,247 98
California 802 970,219 100
Colorado 34 32,290 81
Connecticut 73 11,078 92
Delaware 28 3,259 97
Florida 20 20,499 41
Georgia 92 22,597 55
Idaho 160 212,581 97
Illinois 382 46,530 99
Indiana 331 46,879 85
Iowa 751 125,536 99
Kansas 170 19,915 92
Kentucky 211 25,175 95
Louisiana 34 5,544 75
Maine 115 11,759 84
Maryland 277 31,989 98
Massachusetts 68 5,808 95
Michigan 612 152,270 90
Minnesota 2,002 249,656 100
Mississippi 30 5,824 100
Missouri 285 32,599 99
Montana 23 4,536 81
Nebraska 106 22,220 87
Nevada 10 7,077 100
New Hampshire 79 10,268 100
New Jersey 42 3,607 94
New Mexico 20 64,274 91
New York 1,679 309,758 91
North Carolina 122 23,607 84
North Dakota 31 5,584 82
Ohio 756 111,553 96
Oklahoma 63 9,585 94
Oregon 181 50,986 100
Pennsylvania 3,983 330,121 95
Puerto Rico 110 23,493 94
Rhode Island 9 520 100
South Carolina 49 10,570 96
South Dakota 115 35,675 99
Tennessee 125 16,265 92
Texas 115 102,109 85
Utah 118 36,036 87
Vermont 317 46,135 90
Virginia 345 54,801 92
Washington 176 78,752 95
West Virginia 31 3,370 95
Wisconsin 4,632 642,187 98
Wyoming 2 738 100
United States 19,784 4,095,099 95 

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