Liberty Compost Facility

Synagro’s Liberty Compost Facility produces high-quality compost for commercial agriculture using recycled biosolids, food and green waste. Liberty began producing compost more than 30 years ago. Today, the Liberty facility continues to refine the compost’s mixture. Liberty supplies commercial farmers with large volumes of compost via our transportation services and/or other approved sub-contractors.

Liberty Compost developed the first full-scale, micropore-covered composting system for VOC control with a verified control efficiency of more than 95%. Reaching this challenging goal earned the facility the Best Available Control Technology designation by the San Joaquin Valley Air Pollution Control District. This system has composted more than one million tons of biosolids since commissioning in 2012. In addition, it meets the Class A pathogen and vector attraction reduction requirements of the U.S. Environmental Protection Agency’s 40 CFR 503s.

Facility Information

Liberty Compost Facility


12421 Holloway Road
Lost Hills, CA 93249


2022 Acquisition
163-acre aerated static pile and windrow composting facility
600 wet tons of biosolids recycled per day
200,000 wet tons of annual biosolids recycling capacity

Over 40 municipalities including Los Angeles County Sanitation District, Orange County Sanitation District, Los Angeles , Fresno, Ventura, Santa Barbara, Goleta, Dana Point, Moor Park, Carmel Valley, Tehachapi, Filmore, Cambria, Camarillo and many others