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Terrence J. O'Brien Water Reclamation Plant

Metropolitan Water Reclamation District of Greater Chicago

Not an active site.


3500 Howard St. (Skokie)


West Ridge

First Opened




The Terrence J. O’Brien Water Reclamation Plant is one of seven wastewater treatment facilities owned and operated by the Metropolitan Water Reclamation District of Greater Chicago. The plant converts wastewater into resources like clean water, phosphorus, biosolids and natural gas. Originally called North Side, the O’Brien plant has served residents in communities north of downtown Chicago since 1928. It currently serves over 1.3 million people in an area of 143 square miles and cleans an average of 230 million gallons of wastewater per day (with a maximum capacity twice that). The plant’s most distinctive feature is its impressive ultraviolet (UV) disinfection operation, the largest for a wastewater plant in the U.S. with a capacity to treat over 450 million gallons per day. In this final treatment stage, water passes through the UV facility and is released into the North Shore Channel.

Children's activities

Children's activities, including facepainting, will be offered. The Plant's Human Resources Department will also staff a table.

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