044EE76F-5F39-40FE-8123-375210C659D7 eng utf8 dataset dataset Steve Lennartz EPA Office of Finance and Administration Deputy Geospatial Information Officer (919) 541-1058 109 T.W. Alexander Drive RTP NC 27711 lennartz.steve@epa.gov publisher 2026-06-09 ISO 19139 Geographic Information - Metadata - Implementation Specification 2007 geometryOnly composite 4269 EPSG 6.5(3.0.1) EPA Tribes (5 of 6): Oklahoma Tribal Statistical Areas 2026-05-28 publication 2026-05-28 revision Steve Lennartz EPA Office of Finance and Administration Deputy Geospatial Information Officer (919) 541-1058 109 T.W. Alexander Drive RTP NC 27711 lennartz.steve@epa.gov publisher mapDigital This layer represents locations of Oklahoma Tribal Statistical Areas in Oklahoma. The areas include all Oklahoma Tribal Statistical Areas associated with Federally recognized tribal entities. Changes: May 28, 2026: Two records were updated to the Oklahoma Tribal Statistical Areas (OTSA). This layer is used to support EPA's analysis of regulated facilities, and environmental monitoring stations with regard to existence on or near Tribal lands. EPA and US Census completed Steve Lennartz EPA Office of Finance and Administration Deputy Geospatial Information Officer (919) 541-1058 109 T.W. Alexander Drive RTP NC 27711 lennartz.steve@epa.gov publisher irregular United States place EPA Place Names 2015-01-31 publication Land theme EPA GIS Keyword Thesaurus 2007-11-02 publication 020:118 theme Federal Program Inventory 2013-09-16 publication Downloadable Data EPA Public Domain License licenseUnrestricted https://edg.epa.gov/EPA_Data_License.html vector eng utf8 Microsoft Windows 10 Version 10.0 (Build 19045) ; Esri ArcGIS 13.4.0.55405 -131.713346 -67.035518 25.757448 55.294691 This layer is built by combining boundaries from the 2025 Census American Indian/Alaska Native/Native Hawaiian Areas (AIANNH) data (visithttps://www.census.gov/programs-surveys/geography/technical-documentation/complete-technical-documentation/tiger-geodatabase-file.html for details) with Federally Recognized Tribal Entity Names as provided by EPA's Tribe Entity Mapping Spreadsheet (found at https://www.epa.gov/data/tribes-services ). The relationships between Tribal Areas and Tribal Entities were built during earlier work by EPA's American Indian Environmental Office (AIEO) while developing the Tribal Information Management System (TIMS), and updated to account for the latest Tribal Area and Tribal Entity additions. According to the EPA Tribe Entity Mapping Spreadsheet, two records had name changes, including Fort Sill Apache Tribe of Oklahoma (100000092) and Kiowa Indian Tribe of Oklahoma (100000129). There are no new records for the Oklahoma Tribal Statistical Areas. All boundaries were replaced with 2024 census boundaries, and individual areas may have been adjusted. File Geodatabase Feature Class https://geopub.epa.gov/arcgis/rest/services/EMEF/Tribal/MapServer/4 download Create a new feature class of Oklahoma Tribal Statical Areas from the American Indian, Alaska Native, Native Hawaiian (AAIANNH) layer. Then create one to many join of old production features with new elements added from updated EPA Tribal Names Service dataset. Note that joins to Census data require GEOID and joins to EPA Tribal Names require EPA_ID. Resulting feature class includes duplicated features for joint use areas. 2026-05-28T00:00:00 The Current American Indian/Alaska Native/Native Hawaiian Areas National (AIANNH) National geodatabase includes attributes for the following legal entities: federally recognized American Indian reservations and off-reservation trust land areas, state-recognized American Indian reservations, and Hawaiian home lands. The AIANNH feature class name is AmericanIndian_AlaskaNative_NativeHawaiian. 2024 Census TIGER/Line Geodatabase for American Indian Areas Related National Geodatabase Excel document that contains current and historic tribal data like tribal names, BIA codes, EPA Internal Identifiers, associated EPA regions, and lead EPA regions. Tribe Entity Mapping Spreadsheet annually