GreenWaste Z-Best Composting Facility
Transforming food scraps and yard trimmings into high-quality compost.

Contact Us
What We Process
Yard trimmings from residential and commercial customers throughout Northern California arrive daily to the GreenWaste Z-Best Composting Facility. They are first screened to remove any non-compostable material and then shredded and placed into rows approximately 20′ wide, 12′ high, and 400′ long. Over the next 14-18 weeks, they are turned 1-2 times per week and monitored daily for temperature, moisture, and oxygen. At the end of the composting process, the materials are screened for quality assurance.
The final product is an OMRI-listed compost product used locally for regenerative agriculture and landscaping. Purchase yours today!
The GreenWaste Z-Best Composting Facility processes the post-consumer organics produced by the GreenWaste San Jose Material Recovery Facility.
Once materials arrive on site, they are processed to remove non-compostable items. The compostables are then shredded and injected into 350-foot long bags, where over the next four months they are aerated and monitored to ensure a successful and efficient compost process.
At the end of the four months, materials are removed and undergo a cycle of screening and curing to ensure quality before being sold to local landscapers.
The GreenWaste Z-Best Composting Facility is one of the first to have received an OMRI certification for a compost blend derived from mixed waste.
Our Products
Recycling Fees
Certificates, Forms, and Permits
Hours and Contact
GreenWaste’s Z-Best Compost is OMRI certified organic and approved by the California Department of Food and Agriculture for use on farms, gardens, and nurseries.
Samples from both composting processes are sent monthly to an independent laboratory to be tested for nutrient value, contamination, and pathogen reduction. Every year, this facility creates and sells more than 150,000 tons of compost to farmers and landscapers across California.
GreenWaste is a large wholesale producer of compost and mulch products. Please email Beto Ochoa or call at 408-313-0444 for any questions regarding wholesale purchases of our products. Customers can purchase products directly online or visit our GreenWaste Zanker Resource Recovery Facility in San Jose to purchase in person.
Interested in procuring SB 1383 eligible landscaping products? GreenWaste is pleased to offer a full line of professional SB1383 products for procurement. Browse our online store today!
This facility will accept smaller loads of clean yard waste and brush for $62 per ton and logs at $64 per ton.
For large volume producers of yard trimmings, wood chips, and organic waste, please email John Doyle or call 408-846-1575.
Certifications:
- 2025 OMRI Certifications
2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 - 2025 STA Certified Compost
- 2018 Z-Best Products Temperature Logs and Pathogen Reduction Records
- 2018 Product Quality Certification
Online Application and Authorization Forms:
Permits and Licenses
Address
GreenWaste Z-Best Composting Facility
980 State Highway 25
Gilroy, CA 95020
Hours
Mon. – Fri.: 6:00 AM – 4:30 PM
Sat.: 6:00 AM – 11:30 AM
Closed Sunday
Bulk Sales Inquiry
Interested in purchasing landscaping products in bulk? Fill out the form below.