2023 SLEV Activity by County

(2024-11-21) - Source: http://westnile.ca.gov

CountyHuman CasesMosquito SamplesSentinel Chickens
State Totals197281
Alameda---
Alpine---
Amador---
Butte---
Calaveras---
Colusa---
Contra Costa---
Del Norte---
El Dorado---
Fresno3160-
Glenn---
Humboldt---
Imperial-3-
Inyo-1-
Kern275-
Kings244-
Lake---
Lassen---
Los Angeles1--
Madera-47-
Marin1--
Mariposa---
Mendocino---
Merced-12-
Modoc---
Mono---
Monterey---
Napa---
Nevada---
Orange---
Placer-1-
Plumas---
Riverside1119-
Sacramento1--
San Benito---
San Bernardino---
San Diego---
San Francisco---
San Joaquin-9-
San Luis Obispo---
San Mateo---
Santa Barbara---
Santa Clara---
Santa Cruz---
Shasta-31
Sierra---
Siskiyou---
Solano---
Sonoma---
Stanislaus523-
Sutter---
Tehama---
Trinity---
Tulare1228-
Tuolumne---
Ventura---
Yolo23-
Yuba---
State Totals197281