County | Reported* | Tested | Positive | % Tested Positive |
Alameda | 110 | 6 | 2 | 33% |
Alpine | - | - | - | - |
Amador | - | - | - | - |
Butte | 21 | 7 | - | - |
Calaveras | - | - | - | - |
Colusa | 2 | - | - | - |
Contra Costa | 187 | 6 | - | - |
Del Norte | - | - | - | - |
El Dorado | 13 | 3 | - | - |
Fresno | 54 | 4 | - | - |
Glenn | 2 | - | - | - |
Humboldt | 5 | - | - | - |
Imperial | 1 | - | - | - |
Inyo | - | - | - | - |
Kern | 7 | 2 | - | - |
Kings | 1 | - | - | - |
Lake | 2 | - | - | - |
Lassen | - | - | - | - |
Los Angeles | 259 | 26 | 2 | 8% |
Madera | 8 | - | - | - |
Marin | 14 | - | - | - |
Mariposa | 2 | - | - | - |
Mendocino | 5 | - | - | - |
Merced | 18 | 1 | - | - |
Modoc | - | - | - | - |
Mono | 1 | - | - | - |
Monterey | 6 | - | - | - |
Napa | 8 | 1 | - | - |
Nevada | 3 | - | - | - |
Orange | 66 | 18 | - | - |
Placer | 45 | 14 | - | - |
Plumas | - | - | - | - |
Riverside | 44 | 9 | 1 | 11% |
Sacramento | 249 | 83 | 4 | 5% |
San Benito | 4 | - | - | - |
San Bernardino | 31 | 8 | - | - |
San Diego | 81 | 30 | - | - |
San Francisco | 24 | 7 | - | - |
San Joaquin | 57 | 10 | - | - |
San Luis Obispo | 14 | 2 | - | - |
San Mateo | 111 | 24 | - | - |
Santa Barbara | 9 | 5 | - | - |
Santa Clara | 189 | 28 | 7 | 25% |
Santa Cruz | 19 | 2 | - | - |
Shasta | 4 | 1 | - | - |
Sierra | - | - | - | - |
Siskiyou | - | - | - | - |
Solano | 27 | 10 | - | - |
Sonoma | 27 | - | - | - |
Stanislaus | 50 | - | - | - |
Sutter | 13 | 2 | - | - |
Tehama | 4 | - | - | - |
Trinity | - | - | - | - |
Tulare | 13 | 2 | - | - |
Tuolumne | 1 | - | - | - |
Ventura | 19 | 3 | - | - |
Yolo | 83 | 19 | - | - |
Yuba | 13 | 2 | - | - |
State Totals | 1926 | 335 | 16 | 5% |
* 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