2021 SLEV Activity by County

(2024-04-24) - Source: http://westnile.ca.gov

CountyHuman CasesMosquito SamplesSentinel Chickens
State Totals4462
Alameda---
Alpine---
Amador---
Butte---
Calaveras---
Colusa---
Contra Costa---
Del Norte---
El Dorado---
Fresno17-
Glenn---
Humboldt---
Imperial-3-
Inyo---
Kern1--
Kings-1-
Lake---
Lassen---
Los Angeles---
Madera-3-
Marin1--
Mariposa---
Mendocino---
Merced-22
Modoc---
Mono---
Monterey---
Napa---
Nevada---
Orange---
Placer---
Plumas---
Riverside-24-
Sacramento---
San Benito---
San Bernardino---
San Diego---
San Francisco---
San Joaquin---
San Luis Obispo---
San Mateo---
Santa Barbara---
Santa Clara---
Santa Cruz---
Shasta---
Sierra---
Siskiyou---
Solano---
Sonoma---
Stanislaus12-
Sutter---
Tehama---
Trinity---
Tulare-4-
Tuolumne---
Ventura---
Yolo---
Yuba---
State Totals4462