Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Office of Planning, Environment, & Realty (HEP)
PlanningEnvironmentReal Estate

HEP Events Guidance Publications Awards Contacts

Transportation Air Quality Facts and Figures January 2006

Average Number of Exceedances Per Monitor 1994-2002

Monitor Trends Report

 199419951996199719981999200020012002
CO0.1459460.1348920.1178570.0844040.105860.0986960.0517240.1033140.026423
Ozone0.3902690.553340.4102560.4032260.5869770.5613080.3229810.3432710.523649
PM100.1935850.2810060.4098270.4091420.2743860.3052560.3433910.3936720.410217

Return to Publication

Updated: 07/06/2011
HEP Home Planning Environment Real Estate
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000