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Single-stream materials

metals

Metal

  • Thin Plastic Lids that come on trays cannot be recycled
  • Remove food and crumple aluminum foil into a ball (preferably 2" in diameter)
  • Empty fluids from aluminum cans before recycling them
  • Leave Cans Un-Crushed
plastics

Plastics

  • Empty all liquids and screw all caps back on
  • No food
  • No compostable (PLA #7 )
  • No film plastics (i.e. plastic bag, candy wrappers, chip bags)
  • No Solo Cups (#6 PS)
  • No styrofoam (#6 EPS)
cartons

Paper Cartons

  • Empty out all liquid
  • Does not include paper cups
  • No Plastic Straws!
glass

Glass

  • Empty contents of glass jars and bottles
  • Remove Metal Lids and Recycle them Loose
  • No vases, dishes, mirrors, light bulbs, window glass, or drinking glasses.
  • No broken glass
pizza box

Pizza Boxes

  • Small amounts of grease/cheese are okay
  • Boxes heavily soaked/soiled with grease/cheese should go onto compost or landfill
  • No food, sauce cups, condiment packets, etc
  • Please flatten
paperboard

Paperboard

  • Single layer paper board can now be included with Cardboard 
  • If a cardboard bin is not close by, it can also go into a Papers recycling bin
  • Remove inner packaging (plastic wrap, foil, bags, etc)
  • Remove all food
  • Please flatten
  • No frozen food boxes
cardboard

Cardboard

  • Please flatten
  • Remove all inside/outside packaging (plastic wrap, bubble wrap, styrofoam peanuts, etc)
  • No wax coated cardboad... that goes into the compost 
brown paper bag

Paper Bags

  • Brown paper bags can be included with cardboard
  • If a cardboard bin is not around, they can go into a Papers recycling bin
  • Remove all inside materials 
paper mail

Office Paper and Mail

  • Heavily Dyed, Astro-Bright, and Neon papers are NOT Recyclable because of the chemicals used in the dye
  • No Paper Cups
  • Paper Towels and Napkins are Compostable but NOT Recyclable due to their low grade fibers
  • Make sure Shredded Paper is bagged
newpaper magazines books

Newspaper, Magazines, and Books

  • Large stacks of books should be placed next to bin
paperboard

Paperboard

  • Glossy magazines are okay
  • NO heavy coated plastic paper
  • Do the “rip test”: rip paper and if you see plastic on the inside, then it is not recyclable. Put it in the Landfill Bin
bag of shredded paper

Bagged Shredded Paper

  • No Loose Shred

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Environmental Center

CUSG | Division of Student Affairs 
University of Colorado Environmental Center
207 UCB, UMC 355, Boulder, CO 80309-0207 
To contact us please leave a message at 303-492-8308 or email ecenter@colorado.edu
Office Hours Monday - Friday 9:00a-5:00p

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