UPDATE: Due to the weather, the mosquito spraying scheduled for Wednesday, August 20, has been postponed to next Wednesday, August 27.

The Montgomery County Department of Health & Human Services (HHS) Office of Public Health (OPH) will be spraying to control the adult mosquito population on Wednesday, August 20, 2025, from approximately 8 PM to 11 PM, weather permitting. The alternate date will be Wednesday, August 27. All areas within the highlighted sections of the below map will be subject to the spray. Border roads include Old Welsh Road, Easton Road, Rockwell Road, Rothley Avenue, Hamilton Avenue, and Woodland Road. Residents within the spray area should consider remaining indoors, closing windows, and turning off ventilation systems that draw in outside air for the duration of the spray plus 30 minutes afterward.

Click here to view the press release from Montgomery County. 

Click here to view the FAQ.