40 CFR Part 50
PART 50—NATIONAL PRIMARY AND SECONDARY AMBIENT AIR QUALITY STANDARDS
- PART 50—NATIONAL PRIMARY AND SECONDARY AMBIENT AIR QUALITY STANDARDS
- Chapter I—Environmental Protection Agency › Subchapter C—Air Programs
- § 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 oxides of nitrogen (with nitrogen dioxide as the indicator).
- § 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.
- § 50.17 National primary ambient air quality standards for sulfur oxides (sulfur dioxide).
- § 50.18 National primary ambient air quality standards for PM2.5.
- § 50.19 National primary and secondary ambient air quality standards for ozone.
- § 50.20 National primary ambient air quality standards for PM2.5.
- § 50.21 National secondary ambient air quality standards for sulfur oxides (sulfur dioxide).
- Appendix A-1 to Part 50—Reference Measurement Principle and Calibration Procedure for the Measurement of Sulfur Dioxide in the Atmosphere (Ultraviolet Fluorescence Method)
- Appendix A-2 to Part 50—Reference Method for the Determination of Sulfur Dioxide in the Atmosphere (Pararosaniline Method)
- Appendix B to Part 50—Reference Method for the Determination of Suspended Particulate Matter in the Atmosphere (High-Volume Method)
- Appendix C to Part 50—Measurement Principle and Calibration Procedure for the Measurement of Carbon Monoxide in the Atmosphere (Non-Dispersive Infrared Photometry)
- Appendix D to Part 50—Reference 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 50—Measurement Principle and Calibration Procedure for the Measurement of Nitrogen Dioxide in the Atmosphere (Gas Phase Chemiluminescence)
- Appendix G to Part 50—Reference Method for the Determination of Lead in Total Suspended Particulate Matter
- Appendix H to Part 50—Interpretation of the 1-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone
- Appendix I to Part 50—Interpretation of the 8-Hour Primary and Secondary National Ambient Air Quality Standards for Ozone
- Appendix J to Part 50—Reference Method for the Determination of Particulate Matter as PM10 in the Atmosphere
- Appendix K to Part 50—Interpretation of the National Ambient Air Quality Standards for Particulate Matter
- Appendix L to Part 50—Reference Method for the Determination of Fine Particulate Matter as PM2.5 in the Atmosphere
- Appendix M to Part 50 [Reserved]
- Appendix N to Part 50—Interpretation of the National Ambient Air Quality Standards for PM2.5
- Appendix O to Part 50—Reference Method for the Determination of Coarse Particulate Matter as PM10-2.5 in the Atmosphere
- Appendix P to Part 50—Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone
- Appendix Q to Part 50—Reference Method for the Determination of Lead in Particulate Matter as PM10 Collected From Ambient Air
- Appendix R to Part 50—Interpretation of the National Ambient Air Quality Standards for Lead
- Appendix S to Part 50—Interpretation of the Primary National Ambient Air Quality Standards for Oxides of Nitrogen (Nitrogen Dioxide)
- Appendix T to Part 50—Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Oxides of Sulfur (Sulfur Dioxide)
- Appendix U to Part 50—Interpretation of the Primary and Secondary National Ambient Air Quality Standards for Ozone
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