S.C. Code Regs. § ch. 61, 61-62, 61-62.5, STANDARD NO. 2

Current through Register Vol. 48, No. 10, October 25, 2024

AMBIENT AIR QUALITY STANDARDS

The following table, unless otherwise noted, constitutes the primary and secondary ambient air quality standards for the State of South Carolina. The computations for determining if the applicable standard is met, along with the analytical methods to be used, will be those applicable Federal Reference Methods and Interpretations published in the Appendices to 40 Code of Federal Regulations (CFR) Part 50, or those methods designated as Federal Equivalent Methods (FEM) in accordance with 40 CFR Part 53.

Pollutant	Reference	Measuring Interval	Standard Level
			mg/m3	µg/m3	ppm	ppb
Sulfur Dioxide	40 CFR 50.4 40 CFR 50.5 40 CFR 50.17	3 hour (secondary)	-	1300	0.5	-
		1- hour (primary)	-	-	-	75
PM10	40 CFR 50.6	24 hour	-	150	-	-
PM2.5	40 CFR 50.13 40 CFR 50.18	24 hour (primary)	-	35	-	-
		Annual (primary)	-	12	-	-
		24 hour (secondary)	-	35
		Annual (secondary)	-	15
Carbon Monoxide	40 CFR 50.8	1 hour (no secondary)	40	-	35	-
		8 hour (no secondary)	10	-	9	-
Ozone	40 CFR 50.15	8 hour (2008)	-	-	0.075	-
	40 CFR 50.19	8 hour (2015)	-	-	0.070	-
Nitrogen Dioxide	40 CFR 50.11	Annual	-	100	0.053	53
		1-hour	100
Lead	40 CFR 50.16	Rolling 3-month Average	-	0.15	-	-

S.C. Code Regs. ch. 61, 61-62, 61-62.5, STANDARD NO. 2

Amended by State Register Volume 36, Issue No. 4, eff April 27, 2012; State Register Volume 36, Issue No. 9, eff September 28, 2012 (errata); State Register Volume 38, Issue No. 9, eff. 9/26/2014; State Register Volume 39, Issue No. 06, eff. 6/26/2015; State Register Volume 40, Issue No. 09, eff. 9/23/2016; State Register Volume 44, Issue No. 04, eff. 4/24/2020.