Northern Compost in Zamora (Yolo County) recycles green material, food waste, wood waste, and agricultural waste to provide compost, mulch, biomass fuel, and value-added soil and compost blends.

Drop Off | Buy Compost

Mailing Address:
P.O. Box 177 Napa, CA 94559 | (530) 406-1614
Fax: (530) 406-1751

Physical Address:
11220 County Road 94, Zamora, CA 95698 | (530) 406-1614

Map and Directions


Drop Off

Open Monday – Friday from 8 am – 4 pm;  Tip fees apply (please call for current rates)
Saturday by Appointment

All incoming material is delivered to the tipping area via an all-weather access road from County Road 94. Material delivered by company/commercial transfer vehicles is initially received at a scalehouse where loads are weighed and characterized with respect to material source and type. Following initial processing at the scalehouse, the loads are then directed to the appropriate location for unloading. Loads of largely woody materials are delivered to the chipping/grinding area for processing; green material – a substantial amount of which may arrive pre-processed – may be delivered to the chipping/grinding area or directly to the composting area and deposited into windrows or the appropriate composting technology application for processing. An attendant monitors the site when open and is responsible for managing traffic, monitoring deliveries for prohibited wastes, and litter control activities.

Buy Compost

We turn your yard trimmings and other organic material into compost! Enrich your soil naturally, prevent erosion, conserve water, close the loop, save money, and fight climate change with local compost! It’s perfect for farms, vineyards, gardens, yards, and landscaping projects.  Check out more on the composting process and compost’s benefits!

Available for purchase at our facility: Organic Compost – $22.55/ton

Our compost is listed by the Organic Materials Review Institute (OMRI) for use in organic production, approved as an Organic Input Fertilizing Material by the California Department of Food and Agriculture (CDFA), and certified with the United States Composting Council’s Seal of Testing Assurance.