12645 6th Street
Rancho Cucamonga, California 91739
The Inland Empire Regional Composting Facility (IERCF) was constructed in 2007 under a Joint Powers Authority (JPA) agreement between the Inland Empire Utilities Agency (IEUA) and the Los Angeles County Sanitation Districts (LACSD). The IERCF, located in the city of Rancho Cucamonga, is completely enclosed to control odors to meet stringent air quality regulations and is the nation’s largest indoor biosolids composting facility.
The IERCF uses the Aerated Static Pile composting process to recycle approximately 200,000 wet tons annually, including dewatered and stabilized biosolids from IEUA and LACSD’s wastewater treatment processes, as well as wood waste from local communities. It produces approximately 210,000 cubic yards of high-quality compost each year for local landscaping and horticultural use. The composted product, which is marketed as SoilPro® Products/Class A Exceptional Quality Compost, is sold as a soil conditioner which helps improve water retention, resulting in better plant growth and water savings.