Nov 30, 2021· Comment submitted by National Association of Clean Air Agencies (NACAA)· EPA-HQ-ORD-2014-0859-0082
Filed on regulations.gov — full text not in the inline record.
National Association of Clean Air Agencies filed 1 comment on this docket between Nov 30, 2021 and Nov 30, 2021. 17 other organizations filed here. The comment window closed 1702d ago.
Filed on regulations.gov — full text not in the inline record.
Particulate matter is one of six principal criteria pollutants for which EPA has established National Ambient Air Quality Standards (NAAQS). Periodically, EPA reviews the scientific basis for these standards by preparing an Integrated Science Assessment (ISA). The ISA is the scientific foundation for the additional technical and policy assessments that form the basis for EPA decisions on the adequacy of a current NAAQS and the appropriateness of new or revised standards.
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