These combined sewer overflow (CSO) reports are filed with the State of Illinois on a monthly basis by the City of Mattoon Wastewater Treatment Plant and are provided here pursuant to Illinois Revised Statutes, 1991, Chapter 111 ½, Section 1039.


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CSO Report December 2009Download
CSO Report November 2009Download
CSO Report October 2009Download
CSO Report September 2009Download
CSO Report August 2009Download
CSO Report July 2009Download
CSO Report June 2009Download
CSO Report May 2009Download
CSO Report April 2009Download