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Illinois Natural Areas Inventory (INAI) Sites

INAI Category Descriptions:
  • Cat. I = High quality natural community and natural community restorations
  • Cat. II = Specific suitable habitat for state-listed species or state-listed species relocations
  • Cat. III = State dedicated Nature Preserves, Land and Water Reserves, & Natural Heritage Landmarks
  • Cat. IV = Outstanding geological features
  • Cat. V = Not used at this time
  • Cat. VI = Unusual concentrations of flora or fauna and high quality streams
Instructions for navigating the table:
  • The search box can be used to find keywords or specific sites. Delete the entry in the search box and press enter to return to the original table.
  • The filter function can be used to filter the table by groups. Select the desired filter(s) and click on the "Filter Table" button.  Use the "Clear Filters" button to return to the original table.
  • A spreadsheet may be downloaded using the "Export to CSV" link (note, if the table is filtered, only those records will be exported).

County INAI Name INAI Number Categories

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​Contact Information

Illinois Department of Natural Resources
The Division of Natural Heritage
One Natural Resources Way
Springfield, IL 62702-1271

217-782-6302

Illinois Department of Natural Resources

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