Due to the high abundance of mosquitoes in the area, the Contra Costa Mosquito & Vector Control District will be using truck-mounted ultra-low volume sprayers to control adult mosquitoes in Discovery Bay on the evening of Thursday, October 1, 2020, in the following area (shaded in orange):

Time: Between dusk (approximately 7:00 p.m.) and 11:00 p.m., weather permitting.

Location: Discovery Bay

The area to be treated is bordered on the north by Willow Lake Road and Marina Road; on the south by Wayfarer Court and Cherry Hills Drive; on the east by Channel Drive; and on the west Discovery Bay Boulevard.

The insecticide to be used is Zenivex E4 RTU applied at a rate of 1.5 ounces per acre by truck-mounted ultra-low volume sprayers.

Due to increasing West Nile virus activity in the area, the Contra Costa Mosquito & Vector Control District will be using utility vehicle (UTV)-mounted and hand-held ultra-low volume sprayers to control adult mosquitoes in Brentwood on the evening of Friday September 4, in the following areas (shaded in orange):

Time: Between dusk (approximately 7:30 p.m.) and 11:00 p.m., weather permitting.

Location: Brentwood

The areas to be treated are green spaces including parks and trails (shaded in orange) within the area bordered on the north by Delta Road; on the south by Concord Avenue; on the east by Sellers Avenue; and on the west by Highway 4.

One insecticide to be used is Zenivex E4 RTU applied at a rate of 1.5 ounces per acre by truck-mounted ultra-low volume sprayers. The other insecticide to be used is Pyrocide 7067 applied at a rate of 0.75 ounces per acre by UTV-mounted and hand-held ultra-low volume sprayers.