West Nile virus-positive dead birds
by County and City California, 2023

(2023-09-27) - Source: http://westnile.ca.gov

Alameda County
Alameda5
albany1
fremont3
Fremont7
Hayward1
livemore1
Livermore23
newark3
Oakland1
Pleasanton6
San Lorenzo2
Union City1
Total Positives for Alameda County: 54
 
Butte County
Bangor1
Chico1
Total Positives for Butte County: 2
 
Colusa County
Grimes2
Total Positives for Colusa County: 2
 
Contra Costa County
Alamo1
Antioch3
Brentwood4
Clayton3
Concord18
Crockett1
Danville4
El Cerrito1
Kensington1
Martinez3
Oakley1
Pleasant Hill1
Rodeo1
San Ramon1
Walnut Creek7
Total Positives for Contra Costa County: 50
 
El Dorado County
Lotus1
Rescue2
Total Positives for El Dorado County: 3
 
Fresno County
Fresno1
Total Positives for Fresno County: 1
 
Lake County
Clearlake1
Clearlake Oaks1
Cobb1
Kelseyville1
Lakeport2
Total Positives for Lake County: 6
 
Los Angeles County
Canoga Park2
Cerritos1
Covina11
Culver City1
Glendale1
Glendora1
Lakewood2
Long Beach3
Los Angeles4
Pacoima1
Pomona1
San Dimas1
Temple City1
Tujunga1
Whittier1
Woodland Hills1
Total Positives for Los Angeles County: 33
 
Madera County
Madera1
Total Positives for Madera County: 1
 
Marin County
San Rafael2
Total Positives for Marin County: 2
 
Napa County
American Canyon1
Napa2
Total Positives for Napa County: 3
 
Nevada County
Grass Valley1
Total Positives for Nevada County: 1
 
Placer County
Foresthill1
Granite Bay1
Lincoln4
Loomis1
Newcastle1
Rocklin4
Roseville31
Total Positives for Placer County: 43
 
Riverside County
Corona25
Mira Loma2
Murrieta2
Norco19
Riverside12
Total Positives for Riverside County: 60
 
Sacramento County
Antelope7
Carmichael13
Citrus Heights5
elk grove1
Elk Grove18
Elverta7
Fair Oaks3
Folsom2
Foothill Farms1
Galt3
Gold River1
Orangevale7
Rancho Cordova2
Rio Linda5
Sacramento109
Walnut Grove1
Wilton4
Total Positives for Sacramento County: 189
 
San Benito County
Hollister1
Total Positives for San Benito County: 1
 
San Bernardino County
Chino1
Ontario3
Rancho Cucamonga4
Redlands1
San Bernardino1
Upland1
Total Positives for San Bernardino County: 11
 
San Diego County
el cajon1
Fallbrook1
La Mesa1
Valley Center1
Total Positives for San Diego County: 4
 
San Joaquin County
Acampo1
French Camp1
Lodi1
Manteca1
Stockton9
Thornton1
Tracy6
Total Positives for San Joaquin County: 20
 
San Luis Obispo County
Atascadero1
Total Positives for San Luis Obispo County: 1
 
San Mateo County
Menlo Park1
Redwood City1
Redwood Shores1
Total Positives for San Mateo County: 3
 
Santa Clara County
Campbell3
Los Altos4
Los Gatos1
Monte Sereno1
Morgan Hill3
Mountain View2
Palo Alto16
San Jose39
Santa Clara5
Saratoga4
Sunnyvale4
Total Positives for Santa Clara County: 82
 
Shasta County
Cottonwood1
Redding1
Total Positives for Shasta County: 2
 
Solano County
Davis2
Dixon3
Fairfield5
Suisun City1
Vacaville3
Vallejo1
Total Positives for Solano County: 15
 
Sonoma County
Petaluma4
Santa Rosa5
Total Positives for Sonoma County: 9
 
Stanislaus County
Modesto1
Newman1
Oakdale2
Riverbank1
Turlock1
Total Positives for Stanislaus County: 6
 
Sutter County
Live Oak1
Nicolaus1
Yuba City4
Total Positives for Sutter County: 6
 
Tulare County
Exeter1
Visalia4
Total Positives for Tulare County: 5
 
Ventura County
Simi Valley1
Thousand Oaks1
Ventura1
Total Positives for Ventura County: 3
 
Yolo County
Capay1
Davis40
Madison1
West Sacramento9
Winters1
Woodland11
Total Positives for Yolo County: 63

Total Positives for all Counties: 681

Source: Vector-Borne Disease Section, California Department of Public Health