ARKANSAS POLLUTION CONTROL

AND ECOLOGY COMMISSION

8 CAR PART 40

APPENDIX B

NATIONAL AMBIENT AIR QUALITY STANDARDS LIST

The National Ambient Air Quality Standards are listed in the table below.

Pollutant	Final Rule Cite	Final Rule Date	Rule	Primary / Secondary	Averaging Time	Level	Form	Applicable Chapters
Carbon Monoxide	76 FR 54294	August 31, 2011		Primary	8-hour	9 ppm	Not to be exceeded more than once per year	All Chapters
					1-hour	35 ppm		All Chapters
Lead	73 FR 66964	November 12, 2008		Primary and secondary	Rolling 3 month average	0.15 μg/m³	Not to be exceeded	All Chapters
Nitrogen Dioxide	75 FR 6474	February 9, 2010		Primary	1-hour	100 ppb	98th percentile, averaged over 3 years	All Chapters
	61 FR 52852	October 8, 1996		Primary and secondary	Annual	53 ppb	Annual Mean	All Chapters
Ozone	73 FR 16436	March 27, 2008		Primary and secondary	8-hour	0.075 ppm	Annual fourth-highest daily maximum 8-hr concentration, averaged over 3 years	All Chapters
Particle Pollution, PM₂.₅	78 FR 3085	January 15, 2013		Primary	Annual	12 μg/m³	Annual mean, averaged over 3 years	All Chapters
	71 FR 61144	October 17, 2006		Secondary	Annual	15 μg/m³
				Primary and secondary	24-hour	35 μg/m³	98th percentile, averaged over 3 years	All Chapters

Pollutant	Final Rule Cite	Final Rule Date	Primary / Secondary	Averaging Time	Level	Form	Applicable Chapters
Particle Pollution, PM10	71 FR 61144T	October 17, 2006	Primary and secondary	24-hour	150 µg/m3	Not to be exceeded more than once per year on average over 3 years	All Chapters
Sulfur Dioxide	75 FR 35520	June 22, 2010	Primary	1-hour	75 ppb	99th percentile of 1-hour daily maximum concentrations, averaged over 3 years	All Chapters
	38 FR 25678	September 14, 1973	Secondary	3-hour	0.5 ppm	Not to be exceeded more than once per year	All Chapters