Our 2026 Open House will be held Saturday, June 27, from 12-4 at the District headquarters (1351 Rollins Rd, Burlingame). We hope to see you here!

Culex mosquitoes are able to carry and spread West Nile virus. Our staff collect mosquitoes from around the County using traps set overnight and baited with carbon dioxide and scent lures. Mosquitoes…

Mosquitoes need only a small amount of water to complete their lifecycle. Even just a bottle cap of water can be a breeding location for mosquitoes!

If you believe you have seen invasive Aedes mosquitoes in San Mateo County, please call 650-344-8592 or make a service request for insect identification.

The District provides no-cost control for ground nesting yellowjackets when the location of the nest is known. A yellowjacket nest site looks like a small hole in the ground with many yellowjackets…

Do you live in San Mateo County and spend time outdoors where there may be ticks?