[Code of Federal Regulations]
[Title 40, Volume 5]
[Revised as of July 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR58.50]

[Page 228]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 58_AMBIENT AIR QUALITY SURVEILLANCE--Table of Contents
 
                  Subpart F_Air Quality Index Reporting
 
Sec. 58.50  Index reporting.


    (a) The State or where applicable, local agency shall report to the 
general public on a daily basis through prominent notice an air quality 
index that complies with the requirements of appendix G to this part.
    (b) Reporting is required for all individual MSA with a population 
exceeding 350,000.
    (c) The population of a MSA for purposes of index reporting is the 
most recent decennial U.S. census population.

[71 FR 61302, Oct. 17, 2006]