Our district’s mosquito surveillance and control program is year round. Most of our mosquito control is completed when the mosquitoes are in their larval form (in the water) when they are more easily and efficiently controlled. However, once mosquitoes become flying, biting adults, fogging is the only method to successfully control them.
We evaluate and consider real-time data such as mosquito population, mosquito species (there are 23 species in Contra Costa County), disease presence, weather, the impact to residents, and much more in our decisions to treat mosquitoes in their various stages (larval to adult). When the data reveals there is a threat to our residents by adult mosquitoes in terms of disease or discomfort, we act as soon as operationally possible. We act quickly because adult mosquitoes can fly away and bite people. We announce our fogging plans to the public and the media as quick as we can operationally.
Since we only fog when criteria are met, we do not have a schedule. To sign up for fogging notifications, as well as our media releases and newsletters, visit our website. Anyone can opt in or out at any time and can choose which publications to receive. Fogging information, complete with maps and other information, can also be found on our website.
It’s true that the rain this year has changed the landscape. There certainly is much more water and thus, many more potential mosquito sources. But, we have considerable experience in our nearly 100-year history. Our budget is sound and we are well prepared.
Public Affairs Manager
Contra Costa Mosquito & Vector Control