Jump to main content.


2006 24-Hour PM2.5 Standards — Tribal Designations

This is an unofficial list of tribes in 24-hour PM2.5 nonattainment areas as of October 8, 2009. Official nonattainment boundaries are specified in 40 CFR Part 81. This document in no way establishes tribal territories.

Map showing rough locations of tribes in nonattainment areas across the United States

Tribes in 24-Hour PM2.5 Nonattainment Areas

Tribal Recommendations and EPA Responses

Tribal Area Status December 2008 (Not Final)


Local Navigation


Jump to main content.