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Vector Control District
Vector Control District

Press Releases

2024

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of Sunnyvale and Santa Clara - 9/12/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 9/10/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 9/4/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 8/29/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 8/28/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of Palo Alto - 8/26/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 8/22/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 8/20/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 8/15/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Milpitas- 8/13/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 8/6/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 8/1/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 7/29/24

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 7/24/24

Vector Control District to Conduct Treatments to Eradicate Aggressive, Non-Native Mosquitoes in East San José - 5/24/24

Non-Native Aedes Aegypti Mosquitoes Detected Again in Santa Clara County(Spanish)

Aerial Mosquito Control Treatment in Non-residential Marsh Area to Reduce Nuisance Mosquito Populations - 2/14/2024

2023

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Milpitas - 9/5/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 9/1/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 8/30/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 8/29/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José - 8/25/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of San José and Unincorporated Santa Clara County - 8/18/23

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale - 8/15/23

Positive Tests Confirm West Nile Virus Mosquitoes in Part of San Jose - 8/14/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of Sunnyvale and Santa Clara - 8/1/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of Milpitas and San Jose - 7/31/23

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of Stanford and Palo Alto - 7/24/23

2022

Non-Native Aedes Aegypti Mosquitoes Detected in Santa Clara County - 10/24/22

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of Palo Alto and Los Altos - 10/20/22

Positive Tests Confirm West Nile Virus Mosquitoes in Parts of Mountain View, Los Altos Hills, and Sunnyvale - 9/22/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Milpitas - Media Advisory - 9/21/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale - Media Advisory - 9/9/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale and Cupertino - Media Advisory - 8/25/22

West Nile Virus on the Rise in Santa Clara County - Media Advisory - 8/22/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Cupertino - Media Advisory - 8/11/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale, Santa Clara, and San Jose - Media Advisory - 8/4/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Milpitas - Media Advisory - 7/23/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale and Santa Clara - Media Advisory - 7/19/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale and Santa Clara - Media Advisory - 7/11/22

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Milpitas - Media Advisory - 6/30/22

Aerial Mosquito Control Treatment in Non-residential Marsh Area to Reduce Nuisance Mosquito Populations - 1/26/2022 

2021

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Palo Alto and Mountain View - Media Advisory - 9/17/21

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale and Santa Clara - Media Advisory - 8/30/21

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Gilroy - Media Advisory - 8/26/21

2020

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Los Altos Hills - Media Advisory - 8/13/2020

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Santa Clara - Media Advisory - 6/23/2020​

Aerial Treatment of Bay Marshes to Reduce Population of Summer Salt Marsh Mosquitoes - Advisory - 6/20/2020

Aerial Treatment in Alviso Sewage Lagoons to Reduce Breeding of Mosquitoes Potentially Carrying West Nile Virus - Advisory - 6/14/2020​

Positive Test Confirm West Nile Virus Mosquitoes in Part of Milpitas - Media Advisory - 6/11/2020​

Annual Aerial Treatment of Bay Marshes to Reduce Population of Nuisance Mosquitoes- Media Advisory - 3/26/2020​

Annual Aerial Treatment of Bay Marshes to Reduce Population of Nuisance Mosquitoes - Media Advisory - 2/12/2020

2019​​

County of Santa Clara Vector Control District Prepares for Mosquito Season - Media Advisory - 4/23/19​

Wildlife Warning for Coyote and Mountain Lion Activity - Media Advisory - 4/3/2019​​​​

2018

Positive Tests Confirm West Nile Virus Mosquitoes in Part of San Martin - Media Advisory - 10/04/2018

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale and Santa Clara - Media Advisory - 8/15/2018​​

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale and Santa Clara - Media Advisory - 7/24/2018​​​

Positive Tests Confirm West Nile Virus Mosquitoes in Part of Sunnyvale and Santa Clara - Media Advisory - 6/15/2018​​

CDPH Confirms First Human West Nile Virus Illness of 2018 - CDPH Advisory - 6/15/2018

Warm Weather and the Associated Increase in Mosquito and Tick Population - Media Advisory - 5/28/2018​​

​Annual Aerial Treatment of Bay Marshes to Reduce Population of Nuisance Mosquitoes - Media Advisory​ - 2/14/2018

For more information on adult mosquito treatments