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, wet, or greasy cardboard or paper should be placed in the landfill bins.
  • 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!

Recycling metals

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

Recycling glass

  • Glass bottles, jars.
  • Remove metal lids.

Recycling paper

  • 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).

Recycling cardboard and paperboard

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

Recycling 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.
    • meat.
    • cheese.
    • bread.
    • bones.
    • fruit pits.
    • egg shells.
  • Yard and plant trimmings i.e. flower bouquets.
  • Paper towels (those provided in CDPHE bathrooms and breakrooms).
  • Find more guidance from scraps.com.
  • When in doubt, throw it out (in landfill bins)!


  • Any organics like food or yard scraps when compost is not available.
  • 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.