City of Ottawa, Illinois

 

 

What are combined sewer overflows?

Combined sewer overflows (CSOs) are the result of historic infrastructure practices in which stormwater and wastewater were directed to the same sewer system. In the event of large rainfall or snowmelt events, these sewers may overflow, releasing a mixture of rainwater and untreated sewage directly into surface waters. In Ottawa, our combined sewers overflow into the Fox and Illinois Rivers.

Combined Sewer Overflows

Gary Scott
Public Works Director
301 West Madison Street
Ottawa, Illinois 61350
815-433-0245 ext. 312 Phone
815-433-1934 Fax
E-Mail

Daniel F. Aussem
Commissioner of Public Property
301 West Madison Street
Ottawa, Illinois 61350
815-433-0161 Phone
815-433-2270 Fax
E-Mail