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The Flagg Creek Water Reclamation District (FCWRD), previously known as the Hinsdale Sanitary District, was formed under the Sanitary District Act of 1917. The District's mandate is to provide sewer collection, conveyance, and treatment of sanitary waste in order to protect the health and welfare of the communities it serves.
Over the years, as a result of residential and commercial development in DuPage County, the District expanded its service area to include 11 different communities: Clarendon Hills, Oakbrook Terrace, portions of Burr Ridge, Hinsdale, Darien,
Westmont, Oak Brook, Villa Park, and Lombard. The District serves an area of approximately 24 square miles. FCWRD also owns and operates 21 lift stations in the 24 mile service area. The District has approximately 300 miles of sewers tributary to its wastewater treatment plant. The McElwain water reclamation plant, located in Burr Ridge, IL has a design capacity of 12 million gallons per day (mgd) with a maximum tertiary treatment capacity of 30 mgd. The District also operates an excess flow facility with a rated capacity of 42 mgd. The 12 mgd plant will accomodate up to 120,000 population equivalents based on a 100 gallons per day (gpd) / capita consumption.