Table 3. Participation of dairy cows in DHI mastitis screening as of January 1, 2001, by state.

State Herds Cows Percentage of DHI cows
Alabama 50 8,845 93
Alaska 0 0 0
Arizona 48 67,290 79
Arkansas 73 7,308 96
California 1,068 819,774 92
Colorado 64 38,919 79
Connecticut 101 11,653 86
Delaware 28 3,956 100
Florida 20 18,790 27
Georgia 143 32,966 60
Hawaii 1 436 16
Idaho 217 91,794 94
Illinois 658 56,738 99
Indiana 491 42,004 92
Iowa 1,294 110,986 99
Kansas 306 37,850 99
Kentucky 267 24,702 90
Louisiana 109 14,826 78
Maine 130 10,731 68
Maryland 404 37,755 98
Massachusetts 105 8,746 79
Michigan 947 135,745 89
Minnesota 3,427 287,754 97
Mississippi 68 11,240 91
Missouri 516 47,681 99
Montana 53 7,327 92
Nebraska 257 32,383 96
Nevada 19 9,059 100
New Hampshire 101 9,959 94
New Jersey 76 7,206 96
New Mexico 25 40,415 94
New York 2,404 271,864 84
North Carolina 210 33,915 87
North Dakota 75 7,665 98
Ohio 1,053 95,733 93
Oklahoma 119 14,446 84
Oregon 274 55,749 100
Pennsylvania 4,573 318,234 97
Puerto Rico 146 35,143 87
Rhode Island 6 423 100
South Carolina 75 14,636 92
South Dakota 263 28,369 93
Tennessee 257 31,187 90
Texas 249 110,117 85
Utah 224 46,151 96
Vermont 453 49,769 87
Virgin Islands 0 0 0
Virginia 512 68,009 95
Washington 257 73,256 97
West Virginia 60 6,268 97
Wisconsin 7,543 613,141 98
Wyoming 7 1,328 100
United States 29,826 3,910,241 91