2018 WNV Activity by County

(2020-09-27) - Source: http://westnile.ca.gov

Total Positive Counties: 41

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals217501196316311
Alameda-2015--
Alpine-----
Amador1---1
Butte1244837-
Calaveras-----
Colusa---6-
Contra Costa4131716-
Del Norte-----
El Dorado-2---
Fresno14-119--
Glenn2-4--
Humboldt11---
Imperial--1--
Inyo-----
Kern13148-1
Kings--22--
Lake1-41-
Lassen-----
Los Angeles43197530-
Madera4-55--
Marin-----
Mariposa-----
Mendocino-----
Merced2-12162
Modoc-----
Mono-----
Monterey1----
Napa1----
Nevada1----
Orange91896--
Placer94423041
Plumas-----
Riverside15636--
Sacramento1524130053
San Benito---1-
San Bernardino9-12--
San Diego213--
San Francisco-----
San Joaquin1416533-1
San Luis Obispo-----
San Mateo-52--
Santa Barbara-----
Santa Clara15658-
Santa Cruz-2---
Shasta15841
Sierra-----
Siskiyou-----
Solano--37-
Sonoma--1--
Stanislaus151111-1
Sutter142820-
Tehama2--1-
Trinity-----
Tulare8-77--
Tuolumne11---
Ventura2----
Yolo1141905-
Yuba2-82-
State Totals217501196316311