Title 40, Part 50 — National Primary and Secondary Ambient Air Quality Standards
21 sections
Section 50.1
Definitions.
Section 50.2
Scope.
Section 50.3
Reference conditions.
Section 50.4
National primary ambient air quality standards for sulfur oxides (sulfur dioxide).
Section 50.5
National secondary ambient air quality standard for sulfur oxides (sulfur dioxide).
Section 50.6
National primary and secondary ambient air quality standards for PM.
Section 50.7
National primary and secondary ambient air quality standards for PM.
Section 50.8
National primary ambient air quality standards for carbon monoxide.
Section 50.9
National 1-hour primary and secondary ambient air quality standards for ozone.
Section 50.10
National 8-hour primary and secondary ambient air quality standards for ozone.
Section 50.11
National primary and secondary ambient air quality standards for oxides of nitrogen (with nitrogen dioxide as the indicator).
Section 50.12
National primary and secondary ambient air quality standards for lead.
Section 50.13
National primary and secondary ambient air quality standards for PM.
Section 50.14
Treatment of air quality monitoring data influenced by exceptional events.
Section 50.15
National primary and secondary ambient air quality standards for ozone.
Section 50.16
National primary and secondary ambient air quality standards for lead.
Section 50.17
National primary ambient air quality standards for sulfur oxides (sulfur dioxide).
Section 50.18
National primary ambient air quality standards for PM.
Section 50.19
National primary and secondary ambient air quality standards for ozone.
Section 50.20
National primary ambient air quality standards for PM.
Section 50.21
National secondary ambient air quality standards for sulfur oxides (sulfur dioxide).