2016 WNV Activity by County
Year To Date (Weeks 1 - 37)

(2024-03-28) - Source: http://westnile.ca.gov

Total Positive Counties: 36

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals199123831902800
Alameda-112--
Alpine-----
Amador-----
Butte17214637-
Calaveras-----
Colusa2--9-
Contra Costa12385-
Del Norte-----
El Dorado14---
Fresno86175--
Glenn441110-
Humboldt-----
Imperial-----
Inyo-----
Kern8-78--
Kings14114--
Lake-4384-
Lassen-----
Los Angeles6310433984-
Madera1593--
Marin-5---
Mariposa-----
Mendocino-----
Merced-51233-
Modoc-----
Mono-----
Monterey-----
Napa-14--
Nevada-2-1-
Orange1273327--
Placer-271026-
Plumas-----
Riverside21230--
Sacramento18405444--
San Benito-----
San Bernardino357718-
San Diego3248759-
San Francisco-----
San Joaquin536332--
San Luis Obispo-----
San Mateo-105--
Santa Barbara-----
Santa Clara17812--
Santa Cruz-23--
Shasta13113-
Sierra-----
Siskiyou-----
Solano-7165-
Sonoma-71--
Stanislaus1510245--
Sutter7106832-
Tehama4--8-
Trinity-----
Tulare-3254--
Tuolumne-----
Ventura230---
Yolo11692503-
Yuba941813-
State Totals199123831902800