40 CFR Part 50 - PART 50—NATIONAL PRIMARY AND SECONDARY AMBIENT AIR QUALITY STANDARDS
prev | next
- § 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.
- 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 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
Authority:
42 U.S.C. 7401, et seq.
Source:
36 FR 22384, Nov. 25, 1971, unless otherwise noted.
The following state regulations pages link to this page.
Alaska
Arizona
Arkansas
California
Colorado
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Kansas
Louisiana
Maine
Maryland
Massachusetts
Michigan
Mississippi
Montana
Nebraska
Nevada
New Hampshire
North Carolina
Ohio
Oklahoma
Oregon
Tennessee
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming