Information Resources and Technology Management


You are invited to read the definitions of terms used in this data standard.

Fire Unit Identifier
Unique five- or six-character codes assigned by the Geographic Area Fire Coordination Centers to identify Government organizational units responsible for managing fire-related incidents or projects and providing resources and logistical services to the wildland fire community.
Type Character Field
Syntax 5-character codes: AAAAA or AAANA, where each A represents a letter from A through Z, and N represents a number between 1 and 9. 
  • Alpha Characters 1-2:              State Abbreviation
  • Alphanumeric Characters 3-4:  Unit Name Abbreviation
  • Alpha Character 5:                   'R' signifies U.S. Fish and Wildlife Service as the managing Bureau


  • TXSMR - Texas, San Marcos National Fish Hatchery and Fish Technology Center
  • GAR4R - Georgia, Regional Chief-National Wildlife Refuge System

NOTE:  Unit identifiers assigned to Service organizations do not exceed 5 characters; however, 6-character codes have been assigned to other agencies, particularly county and local fire districts. A link to a complete listing of the national unit identifiers is available in the Source section of this standard.

Recommended Field Name FIREUNITID
Values The official values to be used for this data element are provided in the Source.

A complete listing of the Unit Identifiers for all Geographic Areas of the United States is published by the National Wildlife Coordinating Group, an operational group designed to coordinate programs of the participating wildlife management agencies.

For the most current information on fire unit identifiers assigned to Service organizations, please contact Andrea Olson, Branch of Fire Management, by electronic mail ( or phone (208-387-5597).

Historical Data

For information on past versions of this standard, contact the Chief Data Officer


Part 270, FW 6, Data Management and Standards, has been superceded by Part 274, FW 2, Establishing Service Data Standards.

The U.S. Fish and Wildlife Service Fire Management Handbook supplements the policies, objectives, and standards for fire management presented in the U.S. Fish and Wildlife Service Manual (Part 621, Fire Management).

Use Instructions
As of the approval date and whenever applicable, this data element will be used in any new automated system, data set, database, or information application, including new Geographic Information System (GIS) data and applications. This data element will also be used in any major modifications to existing systems that use fire unit identifiers to identify Service organizational units with burnable acres.

The fire unit identifier will be used on all fire-related incidents, as mandated by Congress and the National Wildlife Coordinating Group, an interagency group that oversees the national wildland fire suppression program.

Service staff are strongly encouraged to utilize this data element in existing systems, data sets, databases, and information applications. Where existing systems and data-related items are not in compliance, they should be modified to achieve compatibility and implement this data standard.

Phase Adopted
Approval Date
August 3, 2004
Validation Date
September 12, 2013
Data Steward
Cameron Tongier, GIS Analyst, Branch of Fire Management, National Interagency Fire Center.


Last updated: May 9, 2019