Nitrogen Dioxide (NO2) Primary Standards
November 22, 2013 – EPA announces the availability of the Integrated Science Assessment for Oxides of Nitrogen (Health Criteria) – First External Review Draft.
The Clean Air Act requires EPA to set national ambient air quality standards (NAAQS) for nitrogen oxides and five other pollutants considered harmful to public health and the environment (the other pollutants are ozone, particulate matter, carbon monoxide, sulfur dioxide, and lead). 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 the NAAQS review process.
Documents from Current Review
- Planning Documents
- Integrated Science Assessments
- Risk and Exposure Assessments
- Policy Assessments
- Other Technical Documents
- CASAC Documents
- Federal Register Notices
- Response to Comments Document
- Regulatory Impact Analysis