 Most mosquito control spray equipment is noisy and will travel 10 to 15 mph while spraying. Grand Forks has a couple of electric sprayers that are relatively quiet. The mosquito control trucks are identified and travel with flashing yellow lights to ensure spray effectiveness during the spray operation. Winds should be less than 10 mph and no inclement weather present. Winds higher than 10 mph or inclement weather may result in the spraying being suspended until conditions improve.