IndianaMapA portion of Indiana's surface waters are sampled annually, either by IDEM or through U.S. EPA support. That data is included in the National Aquatic Resource Surveys, a national overview of water quality. The IDEM Watersheds programs - Nonpoint Source and Total Maximum Daily Load (TMDL), contribute data and information about pollutant loads that staff and watershed groups use when collaborating on planning and implementation activities that will improve water quality.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/1d770cafb3b04a5f87711ae670297c35_3110engIndianaMapPublicFixed Station Water Quality Monitoring [Indiana]Web servicesIndianaLast Modified: 2024-12-18