mosquito spraying in Menlo Park

San Mateo County Mosquito and Vector Control District (SMCMVCD) detected West Nile Virus (WNV) in adult mosquitoes collected on July 29, 2015 in Menlo Park. The District will conduct truck-mounted adult mosquito treatment around the detection site in an effort to prevent human cases of WNV.

Weather permitting, the adult mosquito treatment is scheduled for the night of Sunday, Aug. 2 between 9:00 pm and 5:00 am Monday morning.

The treatment area, which is primarily residential, is approximately bounded by Menlo Ave. to the north, San Mateo Dr. to the west, Creek Dr. to the south, and Waverly St. to the west.

Mosquitoes will be collected in the area after the treatment is complete. If post-treatment mosquito samples are carrying West Nile Virus, additional adult mosquito control treatments may be necessary.

Reports of dead birds are an early indication that West Nile virus is circulating in the environment. Residents are encouraged to help by reporting fresh carcasses of birds or tree squirrels to the West Nile virus hotline, online at or by phone at 877-WNV-BIRD (877-968-2473).