Skip to main content

Mosquito Control Treatment Scheduled in Bassett and Monterey Park

May contain: animal

West Covina, Calif. (July 3, 2024) — The San Gabriel Valley Mosquito and Vector Control District (SGVMVCD) will be conducting Ultra-Low Volume (ULV) truck-mounted adulticide treatments to address the increase in mosquito abundance and risk of mosquito-borne diseases in the communities of Bassett and Monterey Park. The ULV adulticide treatment will target flying adult mosquitoes that may be infected with West Nile virus (WNV).

The treatments will be conducted Tuesday, July 9th between 12AM – 5AM and Wednesday, July 10th between 12AM – 5AM. The Monterey Park treatment will occur in the area between W. Floral Drive and 60 Freeway, east of Vancouver Avenue, and west of Collegian Avenue. The Bassett treatment will occur in the area between Puente Avenue and Vineland Avenue, southwest of Amar Road and northeast of Valley Boulevard.

SGVMVCD technicians will be applying Aquaduet which contains Sumithrin and Prallethrin, active ingredients formulated to mimic the properties in chrysanthemum flowers. Since the material is suspended in water, the application will not harm the finishes on cars or homes. If weather conditions are not favorable, or if there are operational delays, the application may be postponed or delayed.

Basset Treatment Area
Monterey Park Treatment Area

“The district has recorded high mosquito abundance numbers the past few weeks,” said SGVMVD Director of Scientific Program Tristan Hallum. “This treatment will help decrease mosquito populations, interrupt virus transmission, and protect residents from mosquito-borne diseases.”

Every effort will be made to notify residents in the treatment areas 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 WNV 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:

  • Apply mosquito repellent to exposed skin before going outdoors and reapply as recommended on the label.
  • Wear insect repellent containing CDC and EPA approved active ingredients: DEET®, Picaridin, IR3535, or Oil of Lemon Eucalyptus.
  • Wear light-colored, long-sleeved shirts and long pants.

For more information about the mosquito control treatments in Bassett and Monterey Park, visit Residents can contact the San Gabriel Valley Mosquito and Vector Control District at 626-814-9466, online at, or on social media: Facebook, X, and Instagram.


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