Michigan Dept. of Environment, Great Lakes, and EnergyThis dataset represents waters that are directly impacted by uncontrolled combined sewer systems (CSOs) in Michigan, and is based on information provided in the updating of the Integrated Report , using Michigan Department of Environment, Great Lakes, and Energy (EGLE)'s annual CSO reports. Original NHD Plus hydrography was altered to illustrate the reaches of rivers that may be impacted by CSOs. Updates will be conducted as further outfalls are removed or controlled, approximately every two years (2020, 2022, etc). All waters downstream of active uncontrolled outfalls are included, but flowlines passing through the Great Lakes are not included. For current information on the status of CSO facilities, outfalls and discharges, please visit www.mi.gov/sewagedischarge. Version: 2020. Field Name Description ReceivingWaters Surface waters that are receiving discharge from combined sewer overflows OriginatingFacility Permitted discharger for the upstream uncontrolled CSO discharge outfall Learn more about Michigan's Statewide E. coli Total Maximum Daily Load. Additional questions can be directed to Chris Vandenberg at VandenbergC@Michigan.gov .ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/3792ab2479884499898620d60bec7d6f_3engState of Michigan Open Data PortalPublicMichigan Surface Waters Impacted By Combined Sewer Overflows [Michigan]Web servicesMichiganLast Modified: 2025-08-29