Spraying Update

Below you will find adult mosquito treatments currently scheduled. More information and treatment archives are near the bottom of this page. Treatments are subject to change due to weather conditions. Typical AM times are 5:00am to 8:00am and PM times are 8:00pm to midnight. The following information is updated hourly from 7am to 3:30pm Monday through Friday.

  • Sign up for spray notifications to receive emails when ground spraying is scheduled in your zip code.
  • A daily updated recording is available by calling 800-429-1022, menu option 3.

Aerial Spraying over Residential Areas

  • No aerial spraying over residential areas is planned at this time.
  • Get text message updates when spraying begins and ends by texting FOLLOW SYMVCDSpray to 40404 to Fast-follow our Twitter account @SYMVCDSpray that only publishes aerial spraying notifications. Text STOP to 40404 to stop receiving updates.

Aerial Spraying over Agricultural Areas
No aerial spraying over agricultural areas is scheduled at this time.


Ground Spraying
No ground spraying is scheduled at this time.

The Sacramento-Yolo Mosquito and Vector Control District’s primary goal is to protect public health and welfare by managing mosquito populations so they do not present a significant risk to our community. In the event that mosquito populations pose a significant public nuisance or when emergency control measures are needed to rapidly disrupt or terminate the transmission of disease to humans, the District will respond by continuing to implement its Mosquito and Mosquito-borne Disease Management Plan.

As part of this plan, the District may administer Ultra Low Volume (ULV) treatments by using backpack foggers, hand sprayers, truck-mounted foggers or aircraft, in and around areas where virus activity has been detected. Each fogging unit’s output is calibrated to ensure the correct amount of product is applied for each treatment area. All products are registered with the California Environmental Protection Agency (EPA) and are applied by trained and state-certified technicians. Adulticides are chemicals that quickly reduce adult mosquito populations. Larvicides target immature mosquitoes.

Labels for products used (PDF):

The Sacramento-Yolo Mosquito and Vector Control District (SYMVCD) will make every attempt to notify individuals who sign-up for the District’s notification list via e-mail. However, the District may not be able to notify the public if immediate applications are needed to protect public health and welfare from diseases such as West Nile virus, Western Equine Encephalomyelitis, St. Louis Encephalitis or malaria. The SYMVCD may also cancel a scheduled operation due to weather and/or other reasons.

For additional product information, please contact the District at 1-800-429-1022 from 7:00 a.m. to 3:30 p.m. Monday – Friday.

Historical information for previous aerial treatments over residential areas:

Historical information for previous ground treatments: