Blog post

Ready for Rain? Mosquitoes Are!

As fall turns to winter and the weather gets wetter, you may be spending less time in your garden, but mosquitoes will be making themselves right at home. In San Mateo County, our weather never gets cold enough to completely stop mosquitoes from reproducing, even on our chilliest days. Items that can hold rainwater for more than a few days – everything from wheelbarrows and wagons to plant saucers and kids’ toys – can quickly become habitat for thousands of mosquito larvae.

Blog post

Time for Ticks

In some parts of the country, the weather is getting cooler and tick season is winding down. Here in San Mateo County, however, tick season is just beginning. Ticks become abundant shortly after the first rain of the season, and continue questing through the winter and spring. Adult western blacklegged ticks, our local Lyme disease vector, are most abundant December through May, while adult Pacific coast ticks and American dog ticks are most abundant in the spring and early summer.


November 2019 District Newsletter

New from the District in November: Time for Ticks!

Click here to read the November 2019 District Newsletter.


West Nile Virus Update – Ocotober 2019

San Mateo County

As of November 1, 2019, there have been 215 dead birds reported in San Mateo County. Of those, 53 have been suitable for testing and all 53 have tested negative for West Nile virus (WNV). No mosquito pools or sentinel chickens have tested positive for West Nile virus in San Mateo County in 2019.

Blog post Tara Roth, Ph.D.

Fall Back, Spring(tails) Forward

When the temperatures start to change and the nights become colder, you may begin to notice six-legged visitors coming inside your home. As we shutter our doors and windows to keep out the cold, the humidity rises indoors.  This elevated humidity can attract insects and arthropods, including tiny insects called Collembola, or springtails.


Invasive Aedes Mosquitoes


Request Service


Report a Dead Bird


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