County | Reported* | Tested | Positive | % Tested Positive |
Alameda | 706 | 60 | - | - |
Alpine | 3 | - | - | - |
Amador | 110 | 8 | - | - |
Butte | 751 | 38 | 1 | 3% |
Calaveras | 129 | 14 | - | - |
Colusa | 46 | - | - | - |
Contra Costa | 2227 | 108 | 1 | 1% |
Del Norte | 27 | - | - | - |
El Dorado | 543 | 34 | 1 | 3% |
Fresno | 1232 | 77 | - | - |
Glenn | 92 | 4 | - | - |
Humboldt | 78 | 2 | - | - |
Imperial | 35 | - | - | - |
Inyo | 35 | 3 | - | - |
Kern | 1590 | 138 | 1 | 1% |
Kings | 133 | 6 | - | - |
Lake | 94 | 1 | - | - |
Lassen | 23 | - | - | - |
Los Angeles | 5535 | 232 | 31 | 13% |
Madera | 121 | 14 | - | - |
Marin | 219 | 17 | - | - |
Mariposa | 18 | 2 | - | - |
Mendocino | 79 | 7 | - | - |
Merced | 207 | 15 | - | - |
Modoc | 17 | - | - | - |
Mono | 11 | - | - | - |
Monterey | 272 | 11 | - | - |
Napa | 88 | - | - | - |
Nevada | 305 | 24 | 1 | 4% |
Orange | 2996 | 210 | 63 | 30% |
Placer | 724 | 9 | - | - |
Plumas | 57 | 9 | - | - |
Riverside | 1269 | 37 | 3 | 8% |
Sacramento | 3106 | 158 | 5 | 3% |
San Benito | 34 | 2 | - | - |
San Bernardino | 1554 | 69 | 5 | 7% |
San Diego | 1742 | 134 | 47 | 35% |
San Francisco | 105 | 9 | - | - |
San Joaquin | 1509 | 95 | 10 | 11% |
San Luis Obispo | 180 | 15 | - | - |
San Mateo | 389 | 44 | 1 | 2% |
Santa Barbara | 96 | 6 | - | - |
Santa Clara | 961 | 43 | 4 | 9% |
Santa Cruz | 163 | 11 | - | - |
Shasta | 406 | 13 | 5 | 38% |
Sierra | 16 | - | - | - |
Siskiyou | 21 | 2 | - | - |
Solano | 542 | 6 | - | - |
Sonoma | 495 | 49 | - | - |
Stanislaus | 938 | 60 | 4 | 7% |
Sutter | 179 | 6 | 2 | 33% |
Tehama | 137 | 8 | - | - |
Trinity | 14 | 1 | - | - |
Tulare | 754 | 93 | 24 | 26% |
Tuolumne | 92 | 2 | - | - |
Ventura | 553 | 37 | - | - |
Yolo | 534 | 17 | - | - |
Yuba | 103 | 4 | - | - |
State Totals | 34395 | 1964 | 209 | 11% |
* Birds in a die-off are not included in reported totals because the deaths are not related to WNV. A die-off is defined as a group of 10 or more same species dead birds unless the species is American Crow.
Source: Vector-Borne Disease Section, California Department of Public Health