Nitrogen Dioxide NAAQS Review - Analyses and Data Sets
The Clean Air Act requires EPA to set national air quality standards for nitrogen dioxide and five other pollutants considered harmful to public health and the environment (the other pollutants are carbon monoxide, lead, ozone, particulate matter and sulfur dioxide). The law also requires EPA to periodically review the standards to ensure that they provide adequate health and environmental protection, and to update those standards as necessary. Learn more about this process
Contact: Ben Wells
wells.benjamin@epa.gov
(919) 541-7507
Overview of Nitrogen Dioxide (NO2) Air Quality in the U.S.
The documents in this section present an overview of the current state of NO2 air quality in the U.S. based on recent air pollutant emissions and air quality monitoring data.
- Overview of Nitrogen Dioxide (NO2) Air Quality in the United States, based on data through 2023 (pdf)
- Overview of Nitrogen Dioxide (NO2) Air Quality in the United States, based on data through 2022 (pdf)
- Overview of Nitrogen Dioxide (NO2) Air Quality in the United States, based on data through 2021 (pdf) (5.38 MB)
Related Links
View primary technical information on Nitrogen Dioxide NAAQS Review
View general public information on air quality standards, trends, health effects, and programs to reduce Nitrogen Dioxide