Litter Can Service DPW empties litter cans on a schedule, from daily to three times per week. The frequency of emptying depends on the location of the can (high vs. low pedestrian traffic). DPW services litter cans during the day or at night. Hours of Operation 6:30 am - 3:15 pm, Monday through Friday We Will Resolve Within 2 days Holiday Schedule DPW is closed on all government holidays. To Request Services Call the Mayor's Citywide Call Center at 311. Service Request Center