County | Reported* | Tested | Positive | % Tested Positive |
Alameda | 61 | - | - | - |
Alpine | - | - | - | - |
Amador | 2 | - | - | - |
Butte | 10 | - | - | - |
Calaveras | 1 | - | - | - |
Colusa | 2 | - | - | - |
Contra Costa | 111 | 6 | 1 | 17% |
Del Norte | - | - | - | - |
El Dorado | 8 | 2 | - | - |
Fresno | 31 | - | - | - |
Glenn | 2 | - | - | - |
Humboldt | - | - | - | - |
Imperial | - | - | - | - |
Inyo | - | - | - | - |
Kern | 9 | - | - | - |
Kings | 5 | - | - | - |
Lake | - | - | - | - |
Lassen | - | - | - | - |
Los Angeles | 216 | 17 | - | - |
Madera | 3 | 1 | - | - |
Marin | 11 | 1 | - | - |
Mariposa | - | - | - | - |
Mendocino | - | - | - | - |
Merced | 13 | - | - | - |
Modoc | - | - | - | - |
Mono | - | - | - | - |
Monterey | 4 | 1 | - | - |
Napa | 2 | - | - | - |
Nevada | 6 | - | - | - |
Orange | 143 | 107 | - | - |
Placer | 26 | - | - | - |
Plumas | - | - | - | - |
Riverside | 20 | - | - | - |
Sacramento | 168 | 49 | - | - |
San Benito | 1 | - | - | - |
San Bernardino | 21 | 6 | - | - |
San Diego | 45 | 16 | - | - |
San Francisco | 5 | - | - | - |
San Joaquin | 45 | 10 | - | - |
San Luis Obispo | 9 | - | - | - |
San Mateo | 51 | 4 | - | - |
Santa Barbara | 7 | - | - | - |
Santa Clara | 126 | 18 | - | - |
Santa Cruz | 18 | 3 | - | - |
Shasta | 12 | 1 | - | - |
Sierra | - | - | - | - |
Siskiyou | 1 | - | - | - |
Solano | 34 | 2 | - | - |
Sonoma | 21 | 4 | - | - |
Stanislaus | 46 | - | - | - |
Sutter | 8 | 3 | - | - |
Tehama | 1 | - | - | - |
Trinity | - | - | - | - |
Tulare | 11 | 5 | - | - |
Tuolumne | 2 | - | - | - |
Ventura | 17 | - | - | - |
Yolo | 29 | 7 | - | - |
Yuba | 1 | - | - | - |
State Totals | 1365 | 263 | 1 | 0% |
* 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