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Local. Sustainable. Wicked Good.

What is Compostable?

Here at Green Mountain Compost, we make compost on a large scale. Unlike most backyard compost piles, our compost is carefully formulated using a wide variety of inputs and even our smallest piles are huge weighing in at hundreds of tons of mixed ingredients per pile! We actively aerate our piles and frequently monitor them to maintain the ideal amounts of oxygen and moisture for the microbial web that drives the composting process. By achieving ideal conditions, our pile temperatures get really hot really quickly – sometimes within hours.

The high temperatures of our compost process allow us to accept many items that simply don’t work in a backyard compost pile. While you might want to think twice before adding meat, bones, or other potentially tasty treats for four legged critters to your backyard compost pile, these ingredients work great for our composting process. Other materials such as dirt, sod, and metal don’t work so well and are not acceptable in our compost.

Please Contact Us if you are unsure whether or not your item is compostable.

Acceptable Materials

Food and Beverages

If it’s edible, we can compost it! This includes:

Fats and Oil
Meat and Bones
All Fish and Seafood, including shells
Fruits & Vegetables
Eggs and Egg Shells
Milk, Cheese, and all other Dairy Products
Bread and Grains
Coffee and Tea
Condiments (salad dressing, ketchup, etc.)

Lawn and Garden Debris

Yard debris must be divided into two categories and disposed of in the proper bunker:

The leaf bunker accepts:
Small twigs and yard and garden debris such as leaves, garden plants, sawdust, clean and undyed mulch, etc.  Woody twigs up to 1/4 inch in diameter are also allowed.  Larger wood should be deposited in the “clean wood” area at the Williston CSWD Drop-Off Center.

The grass bunker accepts:
Grass clippings, hay, straw, dirty undyed mulch, and sod.

Why do we require that these materials be separated?
Green Mountain Compost no longer includes grass in our compost recipe due to evidence that persistent herbicides are present in some grass clippings. We will work to find a beneficial use for this material. It will not be sent to a landfill.

Farm Manure

Manures and wood chip or paper bedding from small livestock (chickens, rabbits, guinea pigs, etc.) are acceptable. (NO cat, dog, or human waste, though!)

Some types of paper

Please recycle as much as you can and compost only small amounts of food-soiled paper including:

Uncoated paper plates
Greasy pizza boxes
Paper napkins, paper towels, bags, & table covers
Coffee and tea filters
Wood BBQ skewers

Please put recyclable paper in your blue bin, or bring it to a CSWD facility for recycling. CSWD Hours and Locations.

Compostable Products

We do accept compostable products such as takeout containers, cups, utensils and other items that meet very specific standards. Please see the Compostable Products page for details.

We Cannot Accept

  • Wood larger than 1/4 inch in diameter. Please bring this to the “clean wood” area at the Williston CSWD Drop-Off Center.
  • Petroleum-based plastic of any kind
  • Coated or waxed paper
  • Any plastic products that are labeled biodegradable, degradable, photo-degradable, oxo-degradable, etc. (We only accept products that have the “compostable” BPI logo or state “meets ASTM standards for compostability”)
  • Dirt/Fill/Stumps (Go to for where to bring these items.)
  • Horse manure and cow manure
  • Cat, dog, or human waste
  • Diapers, including diapers labeled “compostable”
  • Styrofoam
  • Metals, including foil wrapping and twist ties
  • Toxic materials such as paints, solvents, pesticides, or petroleum products. How to properly dispose of hazardous waste.

What to do with your non-compostable items