Table 3. Participation of dairy cows in DHI mastitis screening as of January 1, 1999, by state.

State	Herds	Cows	Percentage of DHI cows
Alabama	60	10,027	84
Alaska	0	0	0
Arizona	50	62,708	84
Arkansas	86	7,740	89
California	1,072	755,827	92
Colorado	78	30,973	83
Connecticut	109	11,765	76
Delaware	33	4,268	98
Florida	22	12,942	22
Georgia	162	32,265	60
Hawaii	2	1,046	42
Idaho	234	72,533	99
Illinois	739	57,279	99
Indiana	482	38,798	81
Iowa	1,494	113,030	99
Kansas	365	31,618	91
Kentucky	297	25,135	93
Louisiana	122	16,365	76
Maine	142	10,969	69
Maryland	458	39,575	99
Massachusetts	121	10,055	85
Michigan	1,070	132,102	92
Minnesota	3,906	293,561	97
Mississippi	76	12,831	89
Missouri	568	50,286	99
Montana	60	7,206	100
Nebraska	281	32,720	97
Nevada	19	9,296	100
New Hampshire	108	9,968	92
New Jersey	80	7,068	88
New Mexico	23	32,140	87
New York	2,563	261,069	80
North Carolina	220	32,918	80
North Dakota	89	8,699	93
Ohio	1,206	99,504	95
Oklahoma	149	20,017	96
Oregon	277	50,573	100
Pennsylvania	4,720	316,236	98
Puerto Rico	143	34,373	82
Rhode Island	7	478	95
South Carolina	74	14,468	84
South Dakota	308	27,156	91
Tennessee	261	30,122	86
Texas	263	104,728	81
Utah	253	44,707	97
Vermont	488	47,089	84
Virginia	544	69,577	96
Washington	256	66,546	90
West Virginia	74	7,619	98
Wisconsin	8,758	624,260	97
Wyoming	4	666	100
United States	32,976	3,792,901	91