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All your compostables should go in your gray cart.

Why should I compost and where does it all go?
Compost to save money. By taking the time to put compostables in your gray cart, you generate less trash. With less trash, your business can opt for a smaller (and cheaper) garbage service level. Composting also helps the environment because items do not end up sitting in the landfill where they do not decompose.

All compostable items in your gray cart go to Cedar Grove composting facility where they are turned into useful compost, a nutrient-rich fertilizer that people use on their lawns and gardens.

What can I put in my gray cart?
Food scraps, food-soiled paper, biodegradable bags/liners, and yard trimmings go in your gray cart. Download the complete guide.

How do I start this service at our business?
Compost service is available to all qualified businesses and the service is available at no additional cost. To sign up, complete the online application. Contact the Recycling Hotline for more information at (425) 587-3812 or

Public Works
Mon-Fri, 8 a.m. to 5 p.m.
123 5th Avenue, Kirkland WA 98033
Operations & Maintenance
Mon-Fri, 6:30 a.m.-3:30 p.m.
915 8th St, Kirkland WA 98033

General Inquiries

Engineering: T. 425.587.3800 | F. 425.587.3807
Operations & Maintenance: T. 425.587.3900 | F. 425.587.3902