From the City of Pittsburgh:

Mayor Luke Ravenstahl reminds residents that City Environmental Services crews will hold a special spring yard debris collection tomorrow, Sat., May 21. Bagged leaves, tree branches, and bushes will be picked up and recycled for compost as long as those items are properly packaged.

The following items will only be accepted if properly packaged:

• Bagged leaves: Residents must bag leaves in paper bags only and place them out at your normal refuse collection site. Bags should NOT exceed 35 pounds. Leaves in plastic bags will not be accepted.
• Tree branches and bushes: Cut, bundle, and tie branches and bushes in lengths not exceeding five feet in length. Tree branch diameter should not exceed four inches.

City residents must place materials out for residential collection by City refuse/recycling crews today, Fri., May 20. Please note that City crews will not collect dirt, rocks, stones, or cement. Yard debris left at the curb by contracted lawn care workers or independent contractors will not be collected by City crews.