2021 WNV Activity by County

(2021-08-04) - Source: http://westnile.ca.gov

Total Positive Counties: 22

CountyHuman CasesDead BirdsMosquito SamplesSentinel ChickensHorses
State Totals494563101
Alameda-----
Alpine-----
Amador-----
Butte--418-
Calaveras-----
Colusa-----
Contra Costa--2--
Del Norte-----
El Dorado-----
Fresno1-126-1
Glenn-----
Humboldt-----
Imperial-----
Inyo-----
Kern1-28--
Kings--6--
Lake--1--
Lassen-----
Los Angeles-1660--
Madera--33--
Marin-----
Mariposa-----
Mendocino-----
Merced-1-1-
Modoc-----
Mono-----
Monterey-----
Napa-----
Nevada-----
Orange-----
Placer-220--
Plumas-----
Riverside--2--
Sacramento-5626--
San Benito-----
San Bernardino-12--
San Diego-----
San Francisco-----
San Joaquin-1199--
San Luis Obispo1----
San Mateo-----
Santa Barbara-----
Santa Clara-----
Santa Cruz-----
Shasta1-121-
Sierra-----
Siskiyou-----
Solano-----
Sonoma-11--
Stanislaus-120--
Sutter--9--
Tehama-----
Trinity-----
Tulare-567--
Tuolumne-----
Ventura-----
Yolo--4--
Yuba--4--
State Totals494563101