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Home Page > Executive Branch > Code of Federal Regulations > Electronic Code of Federal Regulations

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e-CFR Data is current as of February 4, 2010

TITLE 40--Protection of Environment

CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY

SUBCHAPTER C--AIR PROGRAMS

PART 50--NATIONAL PRIMARY AND SECONDARY AMBIENT AIR QUALITY STANDARDS

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§50.1
Definitions.
§50.2
Scope.
§50.3
Reference conditions.
§50.4
National primary ambient air quality standards for sulfur oxides (sulfur dioxide).
§50.5
National secondary ambient air quality standard for sulfur oxides (sulfur dioxide).
§50.6
National primary and secondary ambient air quality standards for PM10.
§50.7
National primary and secondary ambient air quality standards for PM2.5.
§50.8
National primary ambient air quality standards for carbon monoxide.
§50.9
National 1-hour primary and secondary ambient air quality standards for ozone.
§50.10
National 8-hour primary and secondary ambient air quality standards for ozone.
§50.11
National primary and secondary ambient air quality standards for nitrogen dioxide.
§50.12
National primary and secondary ambient air quality standards for lead.
§50.13
National primary and secondary ambient air quality standards for PM2.5.
§50.14
Treatment of air quality monitoring data influenced by exceptional events.
§50.15
National primary and secondary ambient air quality standards for ozone.
§50.16
National primary and secondary ambient air quality standards for lead.
Appendix
Appendix A to Part 50 --Reference Method for the Determination of Sulfur Dioxide in the Atmosphere (Pararosaniline Method)
Appendix
Appendix B to Part 50 --Reference Method for the Determination of Suspended Particulate Matter in the Atmosphere (High-Volume Method)
Appendix
Appendix C to Part 50 --Measurement Principle and Calibration Procedure for the Measurement of Carbon Monoxide in the Atmosphere (Non-Dispersive Infrared Photometry)
Appendix
Appendix D to Part 50 --Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere
Appendix
Appendix E to Part 50 --[Reserved]
Appendix
Appendix F to Part 50 --Measurement Principle and Calibration Procedure for the Measurement of Nitrogen Dioxide in the Atmosphere (Gas Phase Chemiluminescence)
Appendix
Appendix G to Part 50 --Reference Method for the Determination of Lead in Suspended Particulate Matter Collected From Ambient Air
Appendix
Appendix H to Part 50 --Interpretation of the 1-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone
Appendix
Appendix I to Part 50 --Interpretation of the 8-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone
Appendix
Appendix J to Part 50 --Reference Method for the Determination of Particulate Matter as PM10in the Atmosphere
Appendix
Appendix K to Part 50 --Interpretation of the National Ambient Air Quality Standards for Particulate Matter
Appendix
Appendix L to Part 50 --Reference Method for the Determination of Fine Particulate Matter as PM2.5in the Atmosphere
Appendix
Appendix M to Part 50 --[Reserved]
Appendix
Appendix N to Part 50 --Interpretation of the National Ambient Air Quality Standards for PM2.5
Appendix
Appendix O to Part 50 --Reference Method for the Determination of Coarse Particulate Matter as PMin the Atmosphere
Appendix
Appendix P to Part 50 --Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone
Appendix
Appendix Q to Part 50 --Reference Method for the Determination of Lead in Particulate Matter as PMCollected From Ambient Air
Appendix
Appendix R to Part 50 --Interpretation of the National Ambient Air Quality Standards for Lead
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