Spraying Update

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 risk to our community. If 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 mosquitoes developing in the water.

The District strives to keep the public updated and informed on all mosquito control treatments to protect public health and welfare from diseases such as West Nile virus among others. Residents are encouraged to sign up to receive email notifications for urban, agricultural or ground treatments occurring in their zip code.

**Any scheduled treatment may be postponed, cancelled or rescheduled due to unfavorable weather conditions and/or other reasons**

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

Urban Aerial Spraying

Routine Aerial Spraying to Agricultural Areas

  • The District conducts routine aerial applications to a variety of agricultural sources that may be producing mosquitoes. Agricultural areas that may be treated include areas such as rice fields and pastures.

  • IMPORTANT NOTE: At times when agricultural treatments are being conducted close to residential areas, the plane may fly directly above homes. Material is not being deposited below, rather it is targeting a specific location. For additional information relating to this topic, see our Spraying Frequently Asked Questions page.

  • Morning treatments may occur between 5:00 am to 8:00 am and evening treatments from 8:00 pm to midnight.

  • View an interactive map of the agricultural areas subject to aerial treatments.

Treatments scheduled in the past three days:

7/25/2014Yolo Bypass South of I-80AERIAL ULVWNV POS MOSQ TRAPSCompleted95618PM
7/25/2014Ag Areas South of DavisAERIAL ULVWNV POS MOSQ TRAPSCancelled95620, 95618PM
7/26/2014Ag Areas North of Davis and South of WoodlandAERIAL ULVWNV POS MOSQ TRAPSCompleted95776, 95618, 95695PM

List of all agricultural aerial treatments for 2014.


Ground Spraying

  • As a response to increased WNV activity, the District may conduct localized ground treatments with trucks or backpacks throughout neighborhoods, parks, creeks and other open areas.

  • View an interactive map of the areas subject to ground treatments.

Scheduled in the past three days:

IntermittentlyRural Agriculture & Rice Growing RegionsTruck ULVAdult Threshold ExceededOngoingAM/PM
7/25/2014Christiansen ParkTRUCK ULVWNV POSITIVE MOSQUITO POOLCompleted95695PM
7/25/2014Crawford ParkTRUCK ULVWNV POSITIVE MOSQUITO POOLCompleted95695PM
7/25/2014Klenhard ParkTRUCK ULVWNV POSITIVE MOSQUITO POOLCompleted95776PM
7/25/2014Mather Regional Park, Mather Golf CourseTruck ULVWNV POS MOSQ POOL95655PM
7/25/2014Pioneer ParkBackpack ULVWNV POS POOL95618PM
7/25/2014Putah Creek So. of Garrod Dr.Truck ULVWNV POS POOL95616PM
7/25/2014Rice fields north of Elkhorn Blvd and West of Hwy99Truck ULVWNV POS MOSQ POOL95835, 95836, 95837, 95673PM
7/25/2014Willow Slough & Co. Rd. 27Truck ULVWNV POS POOL95695PM
7/25/2014Wilton area Welch to Walmort and Dillard to E of Tavernor, Clay Station to Cherry RdTruck ULVWNV POS MOSQ POOL95693PM
7/25/2014Woodland Community CollegeTRUCK ULVWNV POSITIVE MOSQUITO POOLCompleted95776PM

List of all ground treatments conducted to date in 2014.

Labels for products used (PDF):

The District will make every attempt to notify individuals who sign-up for our spray notification list via e-mail. The District 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: