N.M. Code R. § 20.2.74.503 Table 3- Significant Monitoring Concentrations

• Library: New Mexico Administrative Code
• Edition: 2023
• Currency: Current through Register Vol. 34, No. 24, December 19, 2023
• Citation: N.M. Code R. § 20.2.74.503
• Year: 2023

POLLUTANT		AIR QUALITY CONCENTRATION micrograms per cubic meter	AVERAGING TIME
Carbon monoxide		575	8 hours
Fluorides		0.25	24 hours
Lead		0.1	3 months
Nitrogen dioxide		14	Annual
Ozone		b
PM10		10	24 hours
PM2.5		0c
Sulfur compounds
Hydrogen sulfide (H2S)	0.20	1 hour
Reduced sulfur compounds (incl. H2S)	10	1 hour
Sulfur dioxide	13	24 hours
Sulfuric acid mist	a
Total reduced sulfur (incl. H2S)	10	1 hour
a - No acceptable monitoring techniques available at this time. Therefore, monitoring is not required until acceptable techniques are available.
b - No de minimis air quality level is provided for ozone. However, any net increase of 100 tons per year or more of volatile organic compounds or nitrogen oxides subject to PSD would be

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