DHI Participation as of January 1, 2020
DHI Report K-1

DHI Participation 2019  
Table 1. Dairy cow enrollment in DHI as of January 1, 2020, by test plan

Plan code Plan tag Herds Cows Percentage of DHI cows
00 DHI 262 130,265 3.2
02 DHI-APCS 717 1,003,358 24.3
20 DHIR 208 46,342 1.1
22 DHIR-APCS 201 137,369 3.3
23 DHIR-AP 1,594 319,056 7.7
31 DHI-AP 5,706 1,975,213 47.9
33 DHI-MO 13 19,772 0.5
34 DHI-MO-AP 9 5,502 0.1
40 DHI-OS 365 34,446 0.8
41 DHI-OS-AP 2,485 205,757 5.0
42 DHI-OS-APCS 207 36,964 0.9
43 DHI-OS-MO 23 18,540 0.4
44 DHI-OS-MO-AP 7 2,348 0.1
45 DHI-OS-AC 4 2,276 0.1
70 DHI-SS 14 8,158 0.2
71 DHI-SS-AP 449 136,567 3.3
72 DHI-SS-APCS 49 38,832 0.9
73 DHI-SS-MO 3 430 0.0
74 DHI-SS-MO-AP 8 3,838 0.1
  All Plans 12,324 4,125,033 100.0 

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DHI Participation 2019  
Table 3. Participation of dairy cows in DHI mastitis screening as of January 1, 2020, by State

State Herds Cows Percentage of DHI cows
Alabama 6 944 100
Arizona 12 29,548 79
Arkansas 12 2,043 95
California 555 868,143 100
Colorado 33 66,144 97
Connecticut 45 7,690 61
Delaware 16 2,762 100
Florida 17 26,092 63
Georgia 47 17,647 91
Idaho 99 225,236 99
Illinois 230 40,521 100
Indiana 209 45,499 74
Iowa 411 112,113 99
Kansas 97 22,588 89
Kentucky 193 25,392 99
Louisiana 23 3,851 96
Maine 83 13,817 92
Maryland 188 27,769 99
Massachusetts 47 3,518 92
Michigan 387 181,520 97
Minnesota 1,054 208,762 100
Mississippi 25 4,749 100
Missouri 169 19,592 100
Montana 13 2,450 74
Nebraska 55 27,427 95
Nevada 6 6,169 89
New Hampshire 57 7,292 100
New Jersey 29 2,832 93
New Mexico 15 70,981 100
New York 1,123 338,148 95
North Carolina 76 22,494 99
North Dakota 16 8,174 100
Ohio 510 91,130 88
Oklahoma 39 5,442 94
Oregon 91 39,088 99
Pennsylvania 2,817 290,616 97
Rhode Island 4 212 100
South Carolina 20 4,796 100
South Dakota 48 39,869 99
Tennessee 49 6,763 100
Texas 82 201,702 90
Utah 64 26,015 88
Vermont 226 47,725 96
Virginia 188 39,277 95
Washington 90 73,095 96
West Virginia 16 1,736 100
Wisconsin 2,535 667,963 99
United States 12,127 3,977,336 96 

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DHI Participation 2019  
Table 4. Dairy cow enrollment in DHI as of January 1, 2020, by State and test-plan category

breed=ALL

  Official Management All Plans  
State Herds Cows Herds Cows Herds Cows Percentage of cow population in DHI
Alabama 2 436 4 508 6 944 24
Arizona 12 29,548 1 8,088 13 37,636 20
Arkansas 9 1,496 4 660 13 2,156 43
California 540 852,237 16 16,673 556 868,910 50
Colorado 33 67,235 2 1,048 35 68,283 36
Connecticut 47 12,534 1 46 48 12,580 65
Delaware 13 2,668 3 94 16 2,762 73
Florida 14 22,965 12 18,512 26 41,477 35
Georgia 39 9,521 14 9,803 53 19,324 24
Idaho 97 222,221 4 4,230 101 226,451 36
Illinois 203 38,733 28 1,902 231 40,635 50
Indiana 135 51,721 80 9,976 215 61,697 35
Iowa 342 99,149 73 14,291 415 113,440 53
Kansas 78 22,787 22 2,474 100 25,261 15
Kentucky 37 8,952 158 16,625 195 25,577 52
Louisiana 7 1,194 18 2,837 25 4,031 40
Maine 84 14,537 3 520 87 15,057 54
Maryland 152 24,055 37 3,900 189 27,955 67
Massachusetts 40 3,237 10 586 50 3,823 38
Michigan 351 173,414 44 14,615 395 188,029 44
Minnesota 896 189,021 161 20,543 1,057 209,564 47
Mississippi 14 2,946 11 1,803 25 4,749 59
Missouri 100 12,327 69 7,265 169 19,592 25
Montana 13 3,167 2 148 15 3,315 28
Nebraska 42 25,214 16 3,559 58 28,773 50
Nevada 7 6,922 0 0 7 6,922 22
New Hampshire 53 6,993 5 314 58 7,307 66
New Jersey 29 2,832 1 201 30 3,033 65
New Mexico 15 70,981 0 0 15 70,981 22
New York 932 332,396 213 22,133 1,145 354,529 57
North Carolina 59 17,556 19 5,241 78 22,797 56
North Dakota 10 4,203 6 3,971 16 8,174 56
Ohio 358 71,889 175 31,880 533 103,769 41
Oklahoma 18 2,289 22 3,493 40 5,782 14
Oregon 88 38,484 4 854 92 39,338 31
Pennsylvania 1,476 206,864 1,360 93,216 2,836 300,080 62
Rhode Island 4 212 0 0 4 212 35
South Carolina 19 3,795 1 1,001 20 4,796 44
South Dakota 31 25,997 18 14,139 49 40,136 32
Tennessee 46 5,884 3 879 49 6,763 22
Texas 73 195,045 26 28,399 99 223,444 39
Utah 59 27,585 11 2,023 70 29,608 31
Vermont 177 42,619 56 7,278 233 49,897 40
Virginia 138 33,294 57 7,955 195 41,249 57
Washington 88 72,797 5 3,448 93 76,245 27
West Virginia 15 1,588 1 148 16 1,736 29
Wisconsin 1,715 575,337 838 100,877 2,553 676,214 53
United States 8,710 3,636,877 3,614 488,156 12,324 4,125,033 44 

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DHI Participation 2019  
Table 5. Testing characteristics for cow herds tested between October and December 2019 by State

  Cow Test Days
State Herds Cows Test days/
herd-year		 Supervised
(%)		 Sampled
(%)		 All milkings weighed
(%)		 All milkings sampled
(%)		 >1 Day recorded
(%)		 3X Milking
(%)
Alabama 8 1,432 10.8 63.9 94.0 16.0 0.0 2.6 0.0
Arizona 13 36,949 12.7 100.0 100.0 51.1 5.7 0.0 76.1
Arkansas 13 2,259 10.4 99.0 99.5 0.0 0.0 0.0 0.0
California 576 847,285 11.7 99.4 99.8 28.8 4.1 6.5 24.5
Colorado 35 58,008 10.7 99.3 97.7 48.5 8.7 30.3 94.0
Connecticut 51 12,429 11.1 99.7 71.5 46.5 0.7 43.6 61.6
Delaware 17 2,754 10.0 97.3 98.6 6.4 0.0 33.7 21.5
Florida 30 31,600 11.7 88.0 74.3 50.1 0.0 39.3 51.0
Georgia 56 20,526 9.9 98.4 88.9 36.6 0.0 25.9 51.5
Idaho 106 187,889 11.6 97.9 100.0 71.8 12.1 8.0 67.6
Illinois 245 43,855 9.4 95.0 97.3 21.6 2.8 14.2 39.5
Indiana 223 48,164 9.4 91.9 88.6 42.6 3.9 35.8 61.9
Iowa 437 116,543 9.8 89.5 94.1 30.0 0.5 17.4 58.4
Kansas 109 27,198 10.3 92.4 92.5 15.6 1.9 13.2 61.3
Kentucky 200 26,606 8.8 79.8 98.6 46.7 5.8 40.4 40.9
Louisiana 26 3,956 9.0 100.0 97.6 22.0 0.0 21.1 0.0
Maine 90 15,509 11.4 95.9 97.0 43.4 3.1 19.1 40.3
Maryland 186 28,536 10.8 93.3 94.2 35.0 8.0 30.0 22.9
Massachusetts 52 4,308 10.2 96.1 100.0 10.7 8.8 1.5 10.3
Michigan 424 175,550 10.3 98.3 90.9 21.2 1.2 25.7 61.0
Minnesota 1,123 218,054 10.7 89.6 98.2 19.4 1.7 15.7 48.2
Mississippi 25 4,596 10.4 96.7 100.0 5.7 0.0 4.5 13.7
Missouri 181 22,048 9.3 85.6 99.8 19.6 0.6 15.9 14.5
Montana 17 3,559 8.4 91.3 98.0 70.8 41.9 57.3 39.9
Nebraska 63 29,774 10.2 88.7 88.4 13.7 0.0 17.1 69.8
Nevada 8 10,830 8.5 100.0 100.0 14.8 4.6 5.4 35.2
New Hampshire 58 7,274 10.0 99.4 99.1 15.1 1.5 12.3 13.2
New Jersey 30 3,106 10.0 89.5 88.8 27.6 4.0 23.6 15.3
New Mexico 16 58,504 10.7 99.9 99.1 34.1 11.8 0.0 48.0
New York 1,183 356,002 10.9 94.5 97.2 28.3 1.2 19.0 72.1
North Carolina 80 22,229 10.9 88.0 98.6 43.8 0.0 39.1 57.4
North Dakota 17 8,336 9.2 62.4 100.0 22.5 0.0 22.8 80.0
Ohio 545 102,348 9.4 85.9 94.6 26.8 8.3 15.8 49.3
Oklahoma 44 6,541 8.1 95.9 100.0 8.6 0.8 2.0 3.9
Oregon 95 38,471 10.2 99.7 99.7 32.8 20.0 6.5 19.6
Pennsylvania 2,863 306,058 11.1 70.8 96.6 22.2 1.8 20.1 26.4
Rhode Island 4 214 5.1 100.0 100.0 45.8 0.0 45.8 0.0
South Carolina 20 4,997 11.2 100.0 96.2 21.0 0.0 22.7 5.6
South Dakota 58 41,221 11.2 94.6 99.0 27.1 1.9 17.7 80.8
Tennessee 53 7,979 8.9 89.5 99.3 26.5 0.2 19.3 22.8
Texas 99 113,235 10.2 97.5 84.3 57.9 0.0 2.3 25.6
Utah 80 29,902 9.3 96.4 100.0 79.7 66.1 32.9 50.6
Vermont 242 52,153 10.6 93.9 95.0 26.4 5.8 13.2 53.4
Virginia 202 43,378 9.3 90.4 92.9 33.1 1.1 28.6 35.6
Washington 96 67,077 10.0 100.0 100.0 64.8 16.9 14.5 58.6
West Virginia 18 1,888 9.4 93.7 98.5 39.7 5.2 23.4 20.3
Wisconsin 2,576 674,375 11.1 87.6 98.1 29.1 2.9 19.7 65.2
United States 12,693 3,925,501 10.9 92.4 97.0 32.2 4.3 15.5 48.3 

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DHI Participation 2019  
Table 6. Dairy goat enrollment in DHI as of January 1, 2020, by State and test-plan category

  Official Management All Plans
State Herds Does Herds Does Herds Does
Alabama 6 51 1 5 7 56
Arizona 6 78 11 137 17 215
Arkansas 5 57 0 0 5 57
California 50 4,016 14 1,664 64 5,680
Colorado 7 126 2 24 9 150
Connecticut 6 48 0 0 6 48
Delaware 0 0 2 8 2 8
Florida 13 112 13 141 26 253
Georgia 5 39 7 113 12 152
Idaho 14 170 6 120 20 290
Illinois 4 67 5 261 9 328
Indiana 6 106 8 63 14 169
Iowa 9 331 4 612 13 943
Kansas 9 107 5 53 14 160
Kentucky 7 152 2 13 9 165
Louisiana 2 41 1 15 3 56
Maine 10 125 5 32 15 157
Maryland 7 468 8 80 15 548
Massachusetts 5 79 1 67 6 146
Michigan 11 101 13 87 24 188
Minnesota 17 1,402 6 68 23 1,470
Mississippi 5 33 2 10 7 43
Missouri 8 87 4 28 12 115
Montana 1 6 6 40 7 46
Nebraska 1 5 0 0 1 5
New Hampshire 3 28 0 0 3 28
New Jersey 1 4 1 6 2 10
New Mexico 6 33 2 21 8 54
New York 11 179 7 102 18 281
North Carolina 5 51 8 95 13 146
Ohio 24 250 8 93 32 343
Oklahoma 8 71 4 46 12 117
Oregon 34 415 22 223 56 638
Pennsylvania 16 525 11 439 27 964
South Carolina 0 0 1 11 1 11
Tennessee 11 125 5 56 16 181
Texas 17 223 24 345 41 568
Utah 8 249 0 0 8 249
Vermont 6 343 3 564 9 907
Virginia 10 175 12 102 22 277
Washington 31 320 33 255 64 575
West Virginia 0 0 2 16 2 16
Wisconsin 21 1,835 15 958 36 2,793
Wyoming 4 39 10 70 14 109
United States 430 12,672 294 7,043 724 19,715 

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We wish to acknowledge the contribution of the dairy producers who supplied data for this report through their participation in the DHI program and the Dairy Records Processing Centers that processed and relayed the information on to the Council on Dairy Cattle Breeding (CDCB).