Nitrogen Dioxide Designations
Where You Live
The links on this page will direct you to information about designations recommendations for the NO2 standards for where you live.
State Designations - State area designations for the 2010 NO2 air quality standards are summarized here.
Tribal Designations - Tribal air designations for the 2010 NO2 air quality standards are summarized here.
Basic Information: Background on NO2 attainment issues and EPA actions to address NO2 emission concerns.
Frequent Questions: Answers to common questions regarding NO2 and the designations process.