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Mosquito Control Treatment Scheduled in Pasadena

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PR_20231009_Pasadena Treatment.pdf

West Covina, Calif. (October 9, 2023) — The San Gabriel Valley Mosquito and Vector Control District (SGVMVCD) will be conducting residential mosquito control applications via truck in the City of Pasadena. The application is being conducted in an effort to reduce the number of mosquitoes in the area and the risk of mosquito-borne disease in the community. SGVMVCD will use ultra-low volume adulticide and low-volume larvicide applications to target mosquitoes at multiple stages to control the population and reduce the risk of mosquito-borne disease.

The truck-mounted treatment will be conducted Tuesday, October 10th and Wednesday, October 11th between the hours of 12AM – 5AM in the city of Pasadena between the 210 freeway and Arroyo Seco north of Everts Street and Hammond Street. SGVMVCD specialists will be applying Aquaduet which contains Sumithrin and Prallethrin, active ingredients formulated to mimic the properties in chrysanthemum flowers. Additionally, VectoBac WDG will be used, which contains Bacillus thuringiensis subsp. israelensis, a naturally occurring bacterium found in soils. If weather conditions are not favorable, or if there are operational delays, the application may be postponed or delayed.

“Our surveillance data reports mosquito populations four times higher than our five year average. The high abundance of mosquitoes increases the risk of mosquito-borne disease transmission,” said SGVMVCD Director of Scientific Programs Tristan Hallum. “The treatment will help decrease those mosquito populations and reduce the risk of mosquito-borne diseases.”

Every effort will be made to notify residents in the treatment area through physical postings, social media, Nextdoor, and news media. The public is also encouraged to visit the District’s website ( for the latest information on mosquito activities.

Mosquito control is a shared responsibility and as mosquito activity increases, residents must take an active role in reducing the threat of mosquito-borne diseases to themselves and in their neighborhoods.

Follow the tips below to reduce mosquito populations on your property:

  • Eliminate standing water in clogged rain gutters, rain barrels, discarded tires, buckets, watering troughs, or anything that holds water for more than a week.
  • Ensure that swimming pools, spas, and ponds are properly maintained.
  • Change the water in pet dishes, birdbaths, and other small containers weekly.
  • Report neglected swimming pools in your neighborhood to your vector control district.
  • Follow the tips below to prevent mosquito bites:
  • Wear insect repellent containing CDC and EPA approved active ingredients: DEET®, Picaridin, IR3535, or Oil of Lemon Eucalyptus.
  •  Wear loosely fitted, light-colored, long-sleeved shirts and long pants.

For more information about the mosquito control treatment in Pasadena, visit Residents can contact the San Gabriel Valley Mosquito and Vector Control District at 626-814-9466, online at, or on social media: FacebookTwitter, and Instagram.


Anais Medina Diaz, Director of Communications | 626-814-9466