2018 WNV Activity by County

(2019-09-19) - Source: http://www.westnile.ca.gov

Total Positive Counties: 41

CountyHuman CasesHorsesDead BirdsMosquito SamplesSentinel Chickens
State Totals217115011963163
Alameda--2015-
Alpine-----
Amador11---
Butte12-44837
Calaveras-----
Colusa----6
Contra Costa4-131716
Del Norte-----
El Dorado--2--
Fresno14--119-
Glenn2--4-
Humboldt1-1--
Imperial---1-
Inyo-----
Kern131148-
Kings---22-
Lake1--41
Lassen-----
Los Angeles43-197530
Madera4--55-
Marin-----
Mariposa-----
Mendocino-----
Merced22-1216
Modoc-----
Mono-----
Monterey1----
Napa1----
Nevada1----
Orange9-1896-
Placer91442304
Plumas-----
Riverside15-636-
Sacramento1532413005
San Benito----1
San Bernardino9--12-
San Diego2-13-
San Francisco-----
San Joaquin14116533-
San Luis Obispo-----
San Mateo--52-
Santa Barbara-----
Santa Clara1-5658
Santa Cruz--2--
Shasta11584
Sierra-----
Siskiyou-----
Solano---37
Sonoma---1-
Stanislaus1511111-
Sutter1-42820
Tehama2---1
Trinity-----
Tulare8--77-
Tuolumne1-1--
Ventura2----
Yolo11-41905
Yuba2--82
State Totals217115011963163