HAYWARD, Calif. July 9, 2026 – Due to increased West Nile virus activity in the Newark area, the Alameda County Mosquito Abatement District (ACMAD) will conduct two adult mosquito control treatments to affected areas centered near Mayhews Landings Park and Birch Grove Park on Friday July 10th.

Treatment Details:

• Date and time: Friday July 10th (weather permitting); Beginning at 12am.
• Location: Areas near Mayhews Landings Park (between Cedar Blvd, Lafayette Ave, Newark Blvd and Dairy Ave.) Areas near Birch Grove Park (between Cedar Blvd, Cherry St. and Central Ave.) See map below.
• Insecticide: Evergreen ULV (5-25) Ground - A public health insecticide
• Method: Truck mounted ultra-low volume sprayer
• Additional details:
• Residents are encouraged to stay indoors and close windows during the treatment.
• The insecticide will break down in sunlight and any remaining residue can be washed away with water is safe to drain into storm drains and sewers.

To learn more about residential mosquito control treatments in Alameda County, please visit our District webpage: Residential Mosquito Control in Alameda County.

So far in 2026 the District has found 19 West Nile virus (WNV) positive dead birds, and multiple mosquito samples in Newark. These results are from residents reporting dead birds through the CDPH WNV Call Center, routine mosquito monitoring traps, and response efforts to WNV positive testing. By applying adult mosquito control in this area ACMAD aims to suppress the mosquito population and lower the risk of West Nile virus transmission to residents and visitors in the neighborhoods.

Effective mosquito control is a community effort.

• Residents are encouraged to remove standing water in and around their homes on a weekly basis. Mosquito sources include but are not limited to pot saucers, unmaintained swimming pools, tires, broken sump pumps and other hidden sources.
• Report dead birds to the CDPH WNV Call Center by calling (877) 968-2473 or by using the online form at CA West Nile virus hotline

Additional information about West Nile virus (WNV): WNV is transmitted to people and animals through the bite of an infected Culex mosquito. Three Culex mosquito species that can transmit WNV are found in Alameda County. There is no cure for West Nile virus. Approximately one in five people who are infected with West Nile virus will develop symptoms such as fever, headache, body aches, joint pains, vomiting, or rash. Less than one percent will develop a serious neurological illness such as encephalitis or meningitis. Adults over 50 years old and people with compromised immune systems are at increased risk of serious complications. Anyone who develops symptoms should seek medical care immediately. For information concerning West Nile virus symptoms, prevention, or testing, please contact the Alameda County Public Health Department at (510) 267-8001.

Horses are very susceptible to West Nile virus, however vaccines are available. Horse owners are advised to contact their veterinarians immediately about timely vaccinations.

Protect Yourself from Mosquito Bites:

• Apply insect repellents containing EPA-registered ingredients such as DEET, picaridin, IR3535, or oil of lemon eucalyptus.
• Wear long-sleeved shirts, pants, socks, and shoes when mosquitoes are most active.
• Ensure window and door screens are in good condition.

The Alameda County Mosquito Abatement District will continue its mosquito monitoring and larval control program, alongside our response to West Nile virus activity throughout the county. To learn more about WNV activity in Alameda County, visit our WNV Activity webpage: https://mosquitoes.org/west-nile-virus-wnv-activity.

Media Contact

Judith Pierce

Public Education Officer

510-783-7744

judith@mosquitoes.org

The adult mosquito control treatment areas are highlighted in green, below. The treatment will begin at 12:00am on July 10th, weather permitting, and is expected to be completed within three hours.

Mayhews Landings Park (between Cedar Blvd, Lafayette Ave, Newark Blvd and Dairy Ave.)

Birch Grove Park (between Cedar Blvd, Cherry St and Central Ave)