Site ID Format

State Code

A two-digit FIPS code that identifies one of the 50 US states.  May also indicate a Tribal Area (TT) or other country such as Canada (CC) or Mexico (80).

County Code

A three-digit FIPS code that identifies a county or the equivalent geo-political entity, such as a parish or independent city.

Tribal Code

Only visible in Tribal Mode.  A two-digit FIPS code that identifies one of the federally recognized Native American tribal agencies when the Tribal Ind is set to "TT".  If your Screening Group also has non-tribal data, this column will contain the County Code.

Site Number

A four-digit number used to uniquely identify a site within a county.  Defined and maintained by the states or Tribal agencies.  When this is a Tribal site care must be taken to ensure that the site ID is unique not only in the Tribal Area but also in all the counties that the tribal area includes or crosses.