Completed in May 1980, the Kirie Plant is the District's newest facility. The Plant is fully automated. From its computer control room, a single operator can monitor all plant processes and equipment.

This Plant serves a predominantly residential area which includes Arlington Heights, Mount Prospect, Elk Grove Village, Prospect Heights, Wheeling, Buffalo Grove and parts of Rolling Meadows and Des Plaines. Kirie has a design capacity of 72 million gallons of wastewater per day.

The Kirie Plant has its own TARP, which is independent of the Mainstream, Des Plaines and Calumet systems. The Kirie TARP is designed with the dual purpose of conveying dry weather flows to the plant and storing excess flows during rainstorms.