Facilities

The Agency’s headquarters buildings were the first and largest public buildings to receive the Platinum rating from the U.S. Green Building Council’s Leadership in Energy and Environmental Design (LEED™) in 2003.

Regional Water Recycling Plant No.1 (RP-1) is located in the city of Ontario has undergone several expansions to increase the design hydraulic domestic sewage (wastewater) treatment capacity to 44 million gallons per day.

Regional Water Recycling Plant No.2 (RP-2) is located in the city of Chino has been in operation since 1960. The plant operated both liquids and solids treatment sections until 2002, when RP-5 was constructed to handle the liquids treatment.

Regional Water Recycling Plant No.4 (RP-4) is located in the city of Rancho Cucamonga and has undergone an expansion to increase the design hydraulic domestic sewage (wastewater) treatment capacity to 14 million gallons per day.

Regional Water Recycling Plant No.5 (RP-5) is located in the city of Chino and has a hydraulic domestic sewage (wastewater) treatment capacity of 16.3 million gallons per day, which includes 1.3 million gallons per day of solids processing returned from RP-2.

Carbon Canyon Water Recycling Facility (CCWRF) is located in the city of Chino and has been in operation since 1992. The design hydraulic domestic sewage (wastewater) treatment capacity is 11.4 million gallons per day.

The Chino Creek Wetlands and Educational Park (CCP/Park) is located adjacent to the IEUA HQ in Chino. The 22 acre park opened in 2007 and was partially funded by a state grant from the State Water Resources Control Board (SWRCB).

The Desalters were established to treat contaminated groundwater in the southern portion of the Chino Basin, and to help the Chino Basin Watermaster achieve “hydraulic control” of the basin to stop the flow of contaminated groundwater into the Santa Ana River.

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 Water Quality Laboratory was built adjacent to Regional Water Recycling Plant No. 5 (RP-5) in Chino to manage water quality testing, enhance performance and improve the process of sample analysis.

The Inland Empire Utilities Agency is pleased to offer free tours of our facilities. For tour requests, questions or more information, please fill out our Facility Tour form or contact Tonia Bouyakzan at tbouyakzan@ieua.org.