Recent findings of invasive Aedes aegypti mosquitoes in Santa Clara, Contra Costa, and Alameda Counties are a reminder that this mosquito may not be far off from re-invading San Mateo County.  (It did invade our County in 2013, but residents and our staff worked together to eradicate it!). Please always report biting mosquitoes, particularly if you are being bitten during the day.

The District recently received three awards recognizing its commitment to governmental transparency and fiscal accountability.

As of September 11, a total of 26 dead birds collected in San Mateo County have tested positive for West Nile virus. Residents have reported over 409 birds so far this year, of which 124 were in appropriate condition for testing. Stay up-to-date with San Mateo County information. Stay up-to-date with statewide California information.

As of August 22, a total of 14 dead birds collected in San Mateo County have tested positive for West Nile virus. Residents have reported over 320 birds so far this year, of which 94 were in appropriate condition for testing. Stay up-to-date with San Mateo County information HERE. Stay up-to-date with statewide information HERE.

As of early July, a total of 5 dead birds collected in San Mateo County have tested positive for West Nile virus. Residents have reported over 220 birds so far this year, of which 65 were in appropriate condition for testing. 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.

Our Open House is THIS Saturday from 12-4pm at our facilities at 1351 Rollins Road, Burlingame. Learn more and sign up for updates on our Open House webpage. We hope to see you here!

We are excited to invite you to our 2024 Open House! The Open House will be held at our facilities (1351 Rollins Road, Burlingame) on Saturday, June 15th from 12-4pm. Visit HERE to learn more and sign up for updates.

- Open Board position - Preventing tick bites - Dump standing water - Staff visit Capitol - District tours - 2024 Open House

Many people know that mosquitoes are especially bothersome during the warmer, summer months.  However, mosquitoes can breed year-round, even in cooler weather.  While their life cycle may take longer in cooler weather, they are still around and growing in a variety of water sources. Our staff have been finding mosquito larvae in backyard sources throughout the County. All the rain might have you…

Are you battling ants this winter? Even we battle seasonal indoor infestations of Argentine ants at our facilities in Burlingame. These small, dark ants are ubiquitous in urban and suburban areas.  We see them forming long trails in the landscaping, tending aphids in the rosebushes, and occasionally wandering around, uninvited, into our offices.

Water in a confined area is referred to as an 'impound.'  Rain-filled impounds can form in low-lying areas or when man-made structures like dams, levees, and gates prevent the flow of water. Much of our work in the rainy months is focused on seasonally-formed impounds. Staff manage these large impounded areas by inspecting for mosquito larvae and applying larvicides that control mosquitoes in the…

-Timely reminders to clean your gutters and check your sump pump -Roof rats -Dengue in California -Travel tips to avoid mosquito bites and diseases -Office closed November 10th in honor of Veterans Day