Health Effects Of NO2 Reviewed | Chemical & Engineering News
Latest News
Web Date: September 5, 2007

Health Effects Of NO2 Reviewed

EPA study finds that current standard may not prevent respiratory problems
Department: Government & Policy | Collection: Green Chemistry
News Channels: Biological SCENE

Nitrogen dioxide causes adverse respiratory effects in people at exposure levels below the current federal air quality limit for this pollutant, EPA concludes in a draft report. The draft analysis, released Aug. 30, examines scientific studies on the potential health effects of exposure to oxides of nitrogen, particularly NO2, which are products of combustion.

The draft says "it is plausible, consistent, and coherent" that exposure to NO2 at levels that are lower than the current air quality standard can "result in adverse impacts to public health." The document is designed to help agency policymakers decide whether to tighten the national ambient air quality standard for NOx, which is 53 ppb. The agency last conducted a review of scientific studies about NOx in 1993.

The draft report is EPA's first analysis of a health-based air quality standard conducted via a controversial new process implemented by the Bush Administration that integrates policy considerations with scientific data. Critics say the new process increases political sway over air quality decisions while decreasing the role of agency scientists (C&EN, Dec. 18, 2006, page 15). The agency's Clean Air Scientific Advisory Committee will review the draft analysis later this year.

The draft document is available at

Chemical & Engineering News
ISSN 0009-2347
Copyright © American Chemical Society

Leave A Comment

*Required to comment