Photo gallery Megan Sebay

Coastal Cleanup Day 2018

It’s that time of year again: Coastal Cleanup Day! On Friday, field operations supervisor Casey and seasonal staff members Evan, Devon, and Justin did their part to keep San Mateo County beautiful by removing some trash from the shoreline.


September 2018 District Newsletter

New from the District in September: Head Lice Head Back to School

Click here to read the September 2018 District Newsletter.

Press release

California Department of Public Health: CDPH Confirms First Two Human West Nile Virus Deaths of 2018

Sacramento, CA – Sept. 10th, 2017

The California Department of Public Health (CDPH) announced today two confirmed deaths in California due to West Nile virus (WNV). The deceased persons were residents of Glenn county and Yuba  county.

“We are still in a peak period of West Nile virus transmission in the state so we urge everyone to take every possible precaution to protect themselves against mosquito bites,” said CDPH Director and State Health Officer Dr. Karen Smith.


West Nile Virus Update
August 2018

San Mateo County

As of August 31, 2018, there have been 291 dead birds reported in San Mateo County. Of those, 91 have been suitable for testing and five have tested positive (5%) for West Nile virus (WNV). Additionally, two mosquito pools have tested positive for WNV, both from East Palo Alto. Positive birds and pools for 2018 are summarized in the tables below. No sentinel chickens have tested positive for West Nile Virus in San Mateo County in 2018, although a sentinel chicken in Santa Clara County, near the border with San Mateo County, tested positive in August.


Post-Treatment Disease Surveillance Finds No West Nile Virus in Mosquitoes Trapped in East Palo Alto

The District laboratory has found no further sign of West Nile virus in mosquitoes trapped in areas of East Palo Alto after this week’s adult mosquito control treatment.

Blog post Tara Roth, Ph.D.

When What’s Bugging You Isn’t A Bug

Here at the District, we examine hundreds of samples every year that are submitted by residents in response to some kind of irritation – a bite, a rash, or some other skin reaction. An entomologist from the District laboratory will work with the responding technician to find the culprit of the bites and help the resident develop a plan to stop the infestation. But what happens when those samples come back bug-free and no evidence of an infestation can be found?


Invasive Aedes Mosquitoes


Request Service


Report a Dead Bird


Board Meeting Agendas