Welcome to the Inland Empire Regional Composting Authority (IERCA) web site. IERCA operates the nation’s largest indoor biosolids composting facility, located in Rancho Cucamonga, California. The Facility produces a wood based, nutrient rich, compost made from recycled green waste, biosolids and horse stable bedding.

The IERCA focuses on producing top quality compost under the guidelines outlined in the United States Composting Council’s Seal of Testing Assurance (STA) Program. Our quality control procedures, known as HACCP (Hazard Analysis and Critical Control Point), are tailored after the U.S Army’s Natick Laboratories and a National Academy of sciences research on food safety for astronauts.  IERCA’s Quality Assurance Program guarantees our compost to be a consistent stable product. In addition, our staff has earned Master Compost Certificates through the University of California Extension Riverside California.

Build healthy soil with our nutrient rich organic SoilPro Products Compost The benefits of using organic materials, such as compost, to amend soils and improve growth of crops are numerous and well documented. Compost products are proven to save water and produce direct benefits to soils and crops in both horticulture (lawns and gardens) and agriculture (vegetables, fruits, nuts, and hay crops).

Investing in Organics Recycling Many municipalities recognize the need for programs to reduce and divert urban organics from our landfills. Composting may represent the greatest potential for turning compostable materials into value-added products. IERCA is committed to transforming organic materials into valuable SoilPro Product, compost and marketing SoilPro  Products to a wide variety of horticultural, landscape, agricultural and erosion control uses. Stay environmentally conscious and buy SoilPro Products today to help close the recycling loop.  Call the IERCA Sales Department at 909-993-1500.