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Accepted Materials- Composting Collection Pilot Program
This is a sample list of some of the different types of materials that can be placed in your green cart for composting collection.  If you are not sure whether a certain item can be composted in the green cart, please contact us and we’ll be happy to verify for you.  Call us at 3-1-1 or e-mail DenverRecycles@denvergov.org.
 
Acceptable Materials:
 
Yard debris:  Grass clippings, leaves, plant trimmings, branches (no larger than 4 feet in length and 4 inches in diameter), flowers, houseplants, weeds and garden trimmings.
 
 
Soiled Paper:  Used paper plates, paper cups, tea bags, coffee filters, paper milk and juice cartons (no foil lined cartons), facial tissue, greasy pizza boxes (non-greasy pizza boxes should go in your recycle cart), microwave popcorn bags, paper ice cream cartons, paper towels, paper napkins, wax paper, waxed cardboard, tissue paper and paper take-out cartons.
 
 
Food:  Baked goods, bones, bread, butter and margarine, cake, candy, cereal, cheese, coffee grounds, cookies, corn cobs and husks, dairy products, eggs and eggshells, fish and fish parts, flour, fruits, grains, gravy and sauces, herbs and spices, jams and jellies, mayonnaise, meat and meat products, nuts and nut shells, oatmeal, pasta, peanut butter, pizza, popcorn, poultry, pumpkins, rice, salads, shellfish, sugar, syrup, tea bags, vegetables, watermelon, yogurt and other processed food like left over pizza or burritos, and more.
 
 
Other Miscellaneous items:  Cotton balls, dryer lint, feathers, hair (pet and human), wooden chopsticks, wooden popsicle sticks and wooden toothpicks.
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Unacceptable
NO PLASTICS!  The program will strictly prohibit any type of plastic materials, as these are contaminants that prohibit the ability to compost the organic material.
 
NO GLASS OR METAL!
 
Due to the wide array of non-organic material it is hard to develop a comprehensive list of unacceptable items.  Some examples of unacceptable items are:
  • Plastic items, including plastic bags, are not acceptable in the program.
  • Styrofoam
  • Glass
  • Metal
  • Cooking oil
  • Diapers
  • Dirt or sand
  • Foil-lined cartons (Typically these are juice boxes for kids or broth and soy milk cartons with plastic spouts. But you should tear the carton to determine if it is foil lined for sure.)
  • Grease
  • Kitty litter
  • Liquids
  • Lumber or construction debris
  • Pet waste
  • Rocks and stones
  • Sod
  • Treated or coated wood
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Recycling Christmas Trees
Please don't place your Christmas tree in your green cart.  Follow the guidelines for the Treecycle program.
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Paper: Recycle or Compost?
Please do not put paper items that are accepted in your purple recycling cart in your green composting cart. Although some of these items are compostable in small amounts (like wrapping your food scraps in sheets of newspaper), it is more environmentally beneficial to recycle paper items in your purple cart. Recycling paper allows old paper to be turned back into new paper, which saves natural resources like trees and water and generates significant energy savings. The following paper items should still be recycled in your purple cart: office paper, cardboard boxes, paperboard boxes (cereal, pasta, crackers, soap, etc.), envelopes, junk mail, magazines and newspaper.
 
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