Composting
Food and yard waste in the landfill release methane - a potent greenhouse gas. Composting is a way to prevent methane and make something new.
Be a climate hero!
Keep curbside compost clean
Call before you haul
- Call your service provider for a list of accepted materials.
- Reach out to your city or county for compost guidelines.
- When in doubt, throw it out!
Contamination costs
- Contaminated food waste can be sent to the landfill.
- Composters pay to have things sorted and cleaned – which raises rates.
- Contaminated compost can create pollution.
Compost bad actors
The most common items that contaminate compost:
- Glass, metal, plastic
- Food stickers
- Foam cups and containers
- Diapers
- Pet waste
- Dairy, meat, animal fat, grease and used cooking oil
How to compost at home
Start local
Check your city or county solid waste program's rules before purchasing bins.
Choose your method
From worms, compost bins, to uncovered piles. Do what works best for you.
Create a balanced diet
Bacteria thrive on a mix of green and brown waste. Check out our User’s Guide to Compost.
For a deeper dive into compost check out Washington State University Resources.