Regulacje i polityka gospodarcza · 11/10/1995

National Ambient Air Quality Standards for Nitrogen Dioxide: Proposed Decision

The level for both the existing primary and secondary national ambient air quality standards (NAAQS) for nitrogen dioxide (NO 2) is 0.053 parts per million (ppm) (100 micrograms per meter cubed ( g/m 3)) annual arithmetic average. In accordance with the provisions of sections 108 and 109 of the Clean Air Act (Act), as amended, the EPA has conducted a review of the criteria upon which the existing NAAQS for NO 2 are based. The revised criteria are being published simultaneously with the issuance of this proposed decision. After evaluating the revised health and welfare criteria, under section 109(d)(1) of the Act, the Administrator has determined that it is not appropriate to propose any revisions to the primary and secondary NAAQS for NO 2 at this time.