*Aerial Application for early-season mosquito larvae planned - 2019*

Aerial Application Update (3/04/2019)

The date for aerial application of VectoBac G larvicide for Aedes increpitus (snowmelt mosquito) larval control has been postponed due to the weather and rise in lake level. We expect to make the application on Monday, March 11 or Tuesday, March 12, but the application date may be adjusted based on mosquito surveillance data, lake level, and the weather. The same areas will be treated, including the area south of Lakeport, the State Park, Anderson Marsh, the marsh east of the Clearlake Keys, and Bridge Arbor South in North Lakeport, with an increase in acreage due to additional lake level-associated flooding.  The application will be made by a yellow biplane.  We expect to begin flying at about 10:00 AM, and that the application will take 4-5 hours to complete. The new application date and any subsequent changes will be posted here. Click HERE for more information.

The Lake County Vector Control District is a public health agency that protects Lake County residents and visitors from vectors and vector-borne diseases. The District is an independent special district that operates under the California Health and Safety Code §§ 2000-2093, and is governed by its own board of trustees. Click HERE for a map of the District's service area. The Lake County Vector Control District’s Board of Trustees meets at 1:30 PM on the second Wednesday of each month at 410 Esplanade, Lakeport, CA.  All meetings are open to the public. Click HERE for the current Agenda & Minutes.

We conduct ongoing surveillance of mosquitoes, ticks, biting black gnats, and other vectors in Lake County to determine the threat of disease transmission and to direct our control activities.

The District practices a program of integrated vector management (IVM), which includes:

  • Surveillance for mosquitoes and other vectors
  • Source reduction
  • Biological control
  • Larviciding and adulticiding, when indicated by surveillance
  • Resistance monitoring
  • Disease surveillance in vectors and reservoirs of disease
  • Public education

Mission Statement

The mission of the Lake County Vector Control District is to provide the citizens of Lake County with the highest practical level of protection from vectors and vector-borne diseases.


In achieving this mission, the Lake County Vector Control District shall:

  • Be proactive in response to current and future vector threats;
  • Respond effectively and courteously to the needs of the public;
  • Inform and educate the public about the shared responsibility of vector control;
  • Apply scientific principles to monitor, evaluate, and improve the District’s ability to fulfill its mission;
  • Utilize the most effective and safest methods available for the control of vectors;
  • Provide vector control services in the most cost-effective manner.