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Indiana Department of Environmental Management


Maps and Geographic Information System (GIS) Applications

  • Continuous Air Quality Monitoring Data (LEADS):
  • Fixed Station Water Quality Monitoring Locator:
    • This is an interactive map with the statewide distribution of the fixed station water monitoring sites. It provides the station name, location description, photos where available of upstream and downstream, and a list of parameters sampled.
  • Hydrologic Unit Code (HUC) Finder:
    • This is an interactive map of the statewide watershed delineations as developed in 1991 for Indiana and updated nationally in 2009. The original 1991 data was built using criteria specific for Indiana’s surface hydrography, and the USGS designations for Sub-basin, Watershed, and Subwatershed were assigned the 8-, 11-, and 14-digit codes representing these drainage areas. In 2005, the USGS was tasked to delineate nationally the subwatershed level using criteria appropriate for the diversity in the national hydrography. The new designations for the national effort resulted in using the 8-, 10-, and 12-digit coding to represent the Sub-basin, Watershed, and Subwatershed drainage areas. The HUC Finder overlays the 2 systems to help watershed coordinators and others recognize the changes that may have occurred and the hydrologic unit coding system.
  • IDEM Staff Maps:
    • IDEM provides detailed Staff Maps for each of its inspection and permitting programs. Use these maps to find an inspector or permit writer for your county / region.
  • Impaired Waters (e303d):
    • This interactive map provides a display of the impaired waters along with additional information associated with the listings, such as the development status of TMDLs and the establishment of watershed management plans (WMPs). Additional guidance on the use of the e303d is available.
  • Indiana Water Quality Atlas (IWQA):
    • Interactive map to view watershed management, land use planning, and water quality analysis. This map focuses specifically on Indiana’s water quality and how it is affected by land use change. Additional guidance on the use of IWQA is available.
  • Mitigation Volunteer:
    • This is an interactive map that allows land owners to volunteer their property to be a mitigation site for other projects in their area. Additional information is available on the IDEM Wetlands, Lakes, and Streams Regulation website.
  • Solid Waste Management Districts Map:
    • Interactive map provides detailed contact information for solid waste management districts throughout Indiana.
  • Wellhead Proximity Determinator:
    • Site specific inquiries regarding if a property is located within or outside of an IDEM approved Wellhead Protection Area can be answered by using the self-service application.

Indiana GIS Services

  • State of Indiana GIS Services:
    • The State of Indiana provides access to Indiana’s ArcGIS Rest Services. The Services Directory allows you to browse the contents of an ArcGIS Server and obtain information that can be useful to you when developing applications.

U.S. Environmental Protection Agency GIS Services

Additional Mapping Resources: