Michigan Dept. of Environment, Great Lakes, and EnergyGroundwater discharges are regulated by Michigan Department of Environment, Great Lakes, and Energy (EGLE) and treat sewage by separating solids from liquids through settling, skimming or sieving, and then generally apply the liquid to the ground. The liquid waste then percolates through the ground (similar to a septic system), allowing time and filtration from the soils to further treat the effluent. Groundwater discharges are not expected to be a source of E. coli to surface water if they are functioning properly. More detailed information, such as discharge monitoring reports and compliance history can be found on the MiEnviro Site Explorer . Fields include permit number, permit category, type of facility, and facility name. To learn more, see the Statewide E. coli TMDL, Section 7.4.D (Nonpoint Sources, Groundwater Discharges) available on the EGLE E. Coli webpage . Field Name Description SiteName Name of permitted site PermitNumber Permit number for associated site PermitCategory Regulatory authorization associated with permit Type Type of permit includes Sanitary Sewage, Slaughterhouses, Commercial Animal Care, and Egg Washing Wastewater OtherPermitDetails Other information pertaining to the NPDES facility, site, and/or permit 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/4fbf084ace96420bb9c4adbc6385c6ff_1engState of Michigan Open Data PortalPublicMichigan Groundwater Sanitary Discharge Permits [Michigan]Web servicesMichiganLast Modified: 2025-08-29