Recycling and composting at CDPHE

Sorting your waste on CDPHE campus

Recycling tips:

  • All recycling should be empty, free of food and mostly clean.
  • Dirty or greasy cardboard or paper should be placed in landfill.
  • Recyclable items should be roughly the size of your palm or larger, anything smaller should be placed in the landfill.
  • When in doubt, throw it out!


  • Aluminum cans and foil (crumpled in a ball the size of fist or larger), pie tins.
  • Steel cans i.e. tuna cans, beans, soup etc.
  • Metal lids larger than the palm of your hand.


  • Glass bottles, jars.
  • Remove metal lids.


  • Office paper, newspapers, magazines, envelopes with windows.
  • Use shred boxes near print stations or CORE rooms that contain sensitive information. This shredded paper can be recycled separately through their vendor.
  • Paper coffee cups and paper coffee cup sleeves.
  • Milk cartons and aseptic/tetra pak containers (chicken broth, rice milk etc.)

Cardboard and paperboard

  • Cereal boxes, clean pizza boxes.
  • Flatten all cardboard and paperboard boxes.

Plastic: bottles, jugs, jars, tubs and containers

  • Do not flatten.
  • Attach plastic screw tops back on the container.


  • Food scraps:
    • vegetable and fruit scraps (no produce stickers)
    • coffee grounds (no filters)
    • meat
    • cheese
    • bread
    • bones
    • pits
  • 3 gallon or smaller, CMS-certified compost bags.
  • Yard and plant trimmings - flower bouquets.


  • Food service ware (compostable or otherwise):
    • plates
    • bowls
    • silverware
    • cups
    • straws
    • dressing containers
    • coffee cup lids
  • Greasy pizza boxes.
  • Paper towels, napkins, coffee filters, etc.
  • Wipes, baby wipes.
  • Chewing gum.
  • Flexible plastics:
    • plastic bags wrappers, chip bags etc.
    • bubble wrap or shipping pouches
  • Other miscellaneous plastics:
    • #7 PLA “compostable” plastics
    • packing peanuts
    • Styrofoam, expanded polystyrene
  • Shredded paper.
  • Paper ream wrappers.

Hard-to-recycle special bins

  • Battery boxes:
    • Located in all CORE rooms.
    • Be sure to tape terminals on required batteries and bag any corroded batteries separately.
  • Writing instruments:
    • Located in all CORE rooms.
    • Collection of pens and markers.