Beginning Monday, garbage removal will change for many residents of the Northwest, West, and near Southwest Sides as the city moves from a nonlinear ward system to a grid garbage pickup.
City workers attached notices to garbage carts at 115,000 households last week alerting residents if their garbage will be collected on a new day.
About 80 percent of the households will experience changes in their weekly trash collection.
About 190,000 households around the city are already on the grid collection system and the entire city should make the transition by spring of next year.
Wards affected this week include, 2, 12, 24, 25, 27, 28, 29, 30, 31, 35, 36, 37 and 38.
Residents with questions should call 311 or their local alderman.
The new system is designed to cut operational costs and streamline a system that previously was based on nonlinear ward geography.