Staff highlights - Sean and Louis

We are fortunate to have dedicated staff passionate about protecting San Mateo County residents from mosquitoes and the diseases they can carry. We'd like to let you get-to-know our staff and why they love their work. This month, we are highlighting Sean and Louis.

Click here to learn more about Sean Jones, Mechanic/Vector Control Technician

Click here to learn more about Louis Fernandez, Facilities Maintenance Coordinator/Vector Control Technician

As weather changes, keep your home safe from rats and mice

As the weather cools, people sometimes report more rodent activity in/around their homes.  It's a good time to check around your home for gaps, holes, and cracks where rats and mice can enter. Not sure what to look for?  We're experts - give us a call to request a rodent inspection. Or request a visit using our online service request form.

Our technicians can visit to inspect the outside of your home for places where rodents can enter.  You'll get a detailed report of suggested repairs as well as tips on the kind of materials to use and how to best do the repairs.

Our staff do not trap rodents or seal/fix holes, but we can re-inspect after you DIY or hire a company to do the repairs.

Public service requests - what happens after you call?

In addition to routine mosquito surveillance and control efforts, District staff respond to an average of nearly 4,000 calls each year.  During busy summer months, the District receives as many as fifty service requests each day.  Every department at the District is involved in intake and response to public service requests. Click here to learn more about how we process and respond to service requests. 

West Nile Virus updates - Stay informed

Current West Nile virus information for San Mateo County

As of early October residents have reported 494 dead birds in San Mateo County to the West Nile Virus Call center (https://westnile.ca.gov/ or 1-877-WNV-BIRD).  Of those, 136 were in testable condition and tested in our laboratory. None of the dead birds collected in San Mateo County have tested positive for West Nile virus so far in 2025. Visit our webpage to stay up-to-date with San Mateo County information. To stay up-to-date with statewide information, visit the webpage with California state-wide data.

No mosquitoes have tested positive for West Nile virus yet this year in San Mateo County. As of early October, our staff have collected and tested over 3,600 mosquitoes in 2025.  West Nile virus has been found in mosquitoes in other counties in Calfornia, so if you are traveling don't forget to take your mosquito repellent and follow other tips to prevent mosquito bites and the diseases they can spread.