Composting

In 2002, IEUA entered into a Joint Powers Agreement with the Los Angeles County Sanitation Districts to create the Inland Empire Regional Composting Authority (IERCA). The IERCA designed and constructed a composting facility in Rancho Cucamonga called the Inland Empire Regional Composting Facility (IERCF). The IERCF is the largest fully enclosed composting facility in North America and has been in operation since 2007, recycling biosolids and amendments such as woodwaste and greenwaste needed for the composting mixture.

Over the past 15 years, IERCF has cost-effectively recycled over two million tons of biosolids and produced over three million cubic yards of high-quality compost with an excellent safety and environmental compliance record.

For FY 2021/22, IERCF processed: 154,196 tons of biosolids and 48,253 tons of amendments. IERCF produced 213,505 cubic yards of Seal of Testing Assurance (STA) Certified Compost sold under the brand name SoilPro Premium Compost. The compost was sold to landscapers and farmers throughout southern California to create healthy soils which require far less water to support plant life.

*Amendments are feedstocks to support the compost recipe.