Michigan Dept. of Environment, Great Lakes, and EnergyHistoric surface water E. coli monitoring site locations and data summaries showing estimated compliance rates with the Michigan water quality standard. Data are compiled by the State of Michigan Department of Environment, Great Lakes and Energy (EGLE) from EGLE-Water Resources Division and publicly available sources (Water Quality Exchange [WQX]). At a minimum, this dataset is updated annually in December from EGLE's own data and WQX. Please note that it is not updated immediately as new results are available. Only monitoring events with a daily geometric mean of three or more samples are included in this dataset. Fields include the site ID, site description, number of sampling events, whether there was a 30-day water quality standard exceedance, sample collector (agency), and the number of water quality standard exceedances. Total Body Contact is represented as TBC, while Partial Body Contact is represented as PBC. Note that if a monitoring event exceeds both the TBC and the PBC, it will only be counted as a PBC exceedance numerically. Field Name Description SiteID Site Identification Number SiteDescription Description of site DataCollector Organization that collected data including state agencies, local health departments and other organizations NumberOfSamples Number of samples collected at a site PBCExceedances Number of partial body contact (PBC) water quality standard exceedances NumberOfSamplesMeetingDailyWQS Number of samples collected that meet daily E. Coli water quality standards NumberOfTotalBodyContactExceeda Number of total body contact (TBC) water quality standard exceedances NumberOf30DayExceedances Number of samples that exceeded the geometric mean of E. coli samples collected over a 30-day period YearMonitored The year samples were collected ReportUrl URL for report containing site information (if available) EPAHowsMyWaterwayLink URL for corresponding How's My Waterway Water Quality report EPADataDownload URL to download data from a particular site 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/a428e703ced4415ab6b5bf18df618bc6_2engState of Michigan Open Data PortalPublicRiver E. coli Monitoring Sites in Michigan [Michigan]Web servicesMichiganLast Modified: 2025-08-29