City of East Grand Forks issued the following announcement on Aug. 11.
Mosquito Spraying is scheduled for Wednesday, August 12th beginning at 8pm
The City will be spraying for mosquitoes Wednesday, August 12th, starting at 8:00pm. Residents may want to go inside before their area is sprayed and stay inside 20-30 minutes after the area has been sprayed or until the aerosol cloud has dissipated.
Original source can be found here.