The plant is operated by the Orange County sanitation District and is the third largest wastewater treatment system west of Mississippi. It is used by 2 million people.
The Orange County Sanitation District processes the third largest volume of sewage west of the Mississippi. As of 2008, the collection facility conveying water to this treatment plant and the Reclamation Plant #1 (in Fountain Valley) contains discharge from over 2.4 million homes, commercial/retail locations, and industry.