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EPA/AR

RIN: 2060-AH92

Publication ID: Fall 1999

Title: Air Quality Index Reporting
Abstract: On July 23, 1999, EPA adopted revisions to the uniform air quality index used by States for daily air quality reporting to the general public in accordance with section 319 of the Clean Air Act (Act). These changes include the addition of the following elements: a new category described as ?unhealthy for sensitive groups;? two new requirements, 1) to report a pollutant-specific sensitive group statement when the index is above 100, 2) to use specific colors if the index is reported in a color format; new breakpoints for the ozone (O3) sub-index in terms of 8-hour average O3 concentrations; a new sub-index for fine particulate matter (PM2.5); and conforming changes to the sub-indices for coarse particulate matter (PM10), carbon monoxide (CO), and sulfur dioxide (SO2). In addition, EPA changed the name of the index from the Pollutant Standards Index to the Air Quality Index (AQI). The revisions enhance the communication of pollutant-specific health effects information to members of sensitive groups, including precautionary actions that can be taken by individuals to reduce exposures of concern. The revisions also enhance the usefulness of the AQI with regard to other programs that provide air quality information and related health information to the general public, including State and local real-time air quality data mapping and community action programs.
Agency: Environmental Protection Agency(EPA)	Priority: Substantive, Nonsignificant
RIN Status: Previously published in the Unified Agenda	Agenda Stage of Rulemaking: Completed Actions
Major: No	Unfunded Mandates: No
CFR Citation: 40 CFR part 58.50 40 CFR part 58 Appendix G (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 42 USC 7401 et seq

Legal Deadline: None

Timetable:

Action	Date	FR Cite
NPRM	12/09/1998	63 FR 67818
Final Action	08/04/1999	64 FR 42530

Additional Information: SAN No. 4073
Regulatory Flexibility Analysis Required: No	Government Levels Affected: Federal, Local, State, Tribal
Small Entities Affected: No
Included in the Regulatory Plan: No
Agency Contact: Susan Stone Environmental Protection Agency Air and Radiation C504-06, Research Triangle Park, NC 27711 Phone:919 541-1146 Fax:919 541-0237 Email: stone.susan@epa.gov Terence Fitz-Simons Environmental Protection Agency Air and Radiation MD-14, RTP, NC 27711 Phone:919 541-0889 Email: fitz-simons.terence@epa.gov