Municipal government websites often end in .gov or .org. Before sharing sensitive information, make sure you're on a City of Chicago government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
The COVID-19 vaccines are safe and effective, and are an important tool for ending the global pandemic. Vaccines protect you and the people around you, reducing the spread of COVID-19. Learn more at Learn more at Chicago.gov/COVIDVax.
DWM is committed to providing the highest level of professional services to meet our customers’ needs now and for future generations
CSO - Combined Sewer Overflows
During storm events, wet weather flow from the City of Chicago's combined sewer system is diverted into the Metropolitan Water Reclamation District of Greater Chicago (MWRDGC)'s Tunnel and Reservoir Plan (TARP) system. When the capacity of TARP is reached, combined sewage may discharge into local waterways via combined sewer overflows (CSO) to alleviate the burden on the sewer system.