40 C.F.R. Part 50 – National Primary and Secondary Ambient Air Quality Standards | Midpage

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Code of Federal Regulations

Part 50

40 C.F.R. Part 50

National Primary and Secondary Ambient Air Quality Standards

50.1Definitions.50.2Scope.50.3Reference conditions.50.4National primary ambient air quality standards for sulfur oxides (sulfur dioxide).50.5National secondary ambient air quality standard for sulfur oxides (sulfur dioxide).50.6National primary and secondary ambient air quality standards for PM 50.7National primary and secondary ambient air quality standards for PM 50.8National primary ambient air quality standards for carbon monoxide.50.9National 1-hour primary and secondary ambient air quality standards for ozone.50.10National 8-hour primary and secondary ambient air quality standards for ozone.50.11National primary and secondary ambient air quality standards for oxides of nitrogen (with nitrogen dioxide as the indicator).50.12National primary and secondary ambient air quality standards for lead.50.13National primary and secondary ambient air quality standards for PM 50.14Treatment of air quality monitoring data influenced by exceptional events.50.15National primary and secondary ambient air quality standards for ozone.50.16National primary and secondary ambient air quality standards for lead.50.17National primary ambient air quality standards for sulfur oxides (sulfur dioxide).50.18National primary ambient air quality standards for PM 50.19National primary and secondary ambient air quality standards for ozone.50.20National primary ambient air quality standards for PM 50.21National secondary ambient air quality standards for sulfur oxides (sulfur dioxide).Appendix A-1 to Part 50Reference Measurement Principle and Calibration Procedure for the Measurement of Sulfur Dioxide in the Atmosphere (Ultraviolet Fluorescence Method)Appendix A-2 to Part 50Reference Method for the Determination of Sulfur Dioxide in the Atmosphere (Pararosaniline Method)Appendix B to Part 50Reference Method for the Determination of Suspended Particulate Matter in the Atmosphere (High-Volume Method)Appendix C to Part 50Measurement Principle and Calibration Procedure for the Measurement of Carbon Monoxide in the Atmosphere (Non-Dispersive Infrared Photometry)Appendix D to Part 50Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method)Appendix E to Part 50[Reserved]Appendix F to Part 50Measurement Principle and Calibration Procedure for the Measurement of Nitrogen Dioxide in the Atmosphere (Gas Phase Chemiluminescence)Appendix G to Part 50Reference Method for the Determination of Lead in Total Suspended Particulate Matter Appendix H to Part 50Interpretation of the 1-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone Appendix I to Part 50Interpretation of the 8-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone Appendix J to Part 50Reference Method for the Determination of Particulate Matter as PM Appendix K to Part 50Interpretation of the National Ambient Air Quality Standards for Particulate Matter Appendix L to Part 50Reference Method for the Determination of Fine Particulate Matter as PM Appendix M to Part 50[Reserved]Appendix N to Part 50Interpretation of the National Ambient Air Quality Standards for PM Appendix O to Part 50Reference Method for the Determination of Coarse Particulate Matter as PM Appendix P to Part 50Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone Appendix Q to Part 50Reference Method for the Determination of Lead in Particulate Matter as PM Appendix R to Part 50Interpretation of the National Ambient Air Quality Standards for Lead Appendix S to Part 50Interpretation of the Primary National Ambient Air Quality Standards for Oxides of Nitrogen (Nitrogen Dioxide)Appendix T to Part 50Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Oxides of Sulfur (Sulfur Dioxide)Appendix U to Part 50Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone