Site Feedback

Title 40

Displaying title 40, up to date as of 9/21/2021. Title 40 was last amended 9/21/2021.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 40 Protection of Environment Part / Section
Chapter I Environmental Protection Agency 1 – 1099
Subchapter C Air Programs 50 – 99
Part 61 National Emission Standards for Hazardous Air Pollutants 61.01 – 61.359
Subpart A General Provisions 61.01 – 61.19
Subpart B National Emission Standards for Radon Emissions From Underground Uranium Mines 61.20 – 61.26
Subpart C National Emission Standard for Beryllium 61.30 – 61.34
Subpart D National Emission Standard for Beryllium Rocket Motor Firing 61.40 – 61.44
Subpart E National Emission Standard for Mercury 61.50 – 61.56
Subpart F National Emission Standard for Vinyl Chloride 61.60 – 61.71
Subpart G [Reserved]
Subpart H National Emission Standards for Emissions of Radionuclides Other Than Radon From Department of Energy Facilities 61.90 – 61.97
Subpart I National Emission Standards for Radionuclide Emissions From Federal Facilities Other Than Nuclear Regulatory Commission Licensees and Not Covered by Subpart H 61.100 – 61.108
Subpart J National Emission Standard for Equipment Leaks (Fugitive Emission Sources) of Benzene 61.110 – 61.112
Subpart K National Emission Standards for Radionuclide Emissions From Elemental Phosphorus Plants 61.120 – 61.127
Subpart L National Emission Standard for Benzene Emissions from Coke By-Product Recovery Plants 61.130 – 61.139
Subpart M National Emission Standard for Asbestos 61.140 – 61.157
Subpart N National Emission Standard for Inorganic Arsenic Emissions From Glass Manufacturing Plants 61.160 – 61.165
Subpart O National Emission Standard for Inorganic Arsenic Emissions From Primary Copper Smelters 61.170 – 61.177
Subpart P National Emission Standard for Inorganic Arsenic Emissions From Arsenic Trioxide and Metallic Arsenic Production Facilities 61.180 – 61.186
Subpart Q National Emission Standards for Radon Emissions From Department of Energy Facilities 61.190 – 61.193
Subpart R National Emission Standards for Radon Emissions From Phosphogypsum Stacks 61.200 – 61.210
Subpart S [Reserved]
Subpart T National Emission Standards for Radon Emissions From the Disposal of Uranium Mill Tailings 61.220 – 61.226
Subpart U [Reserved]
Subpart V National Emission Standard for Equipment Leaks (Fugitive Emission Sources) 61.240 – 61.247
Subpart W National Emission Standards for Radon Emissions From Operating Mill Tailings 61.250 – 61.256
Subpart X [Reserved]
Subpart Y National Emission Standard for Benzene Emissions From Benzene Storage Vessels 61.270 – 61.277
Subparts Z-AA [Reserved]
Subpart BB National Emission Standard for Benzene Emissions From Benzene Transfer Operations 61.300 – 61.306
Subparts CC-EE [Reserved]
Subpart FF National Emission Standard for Benzene Waste Operations 61.340 – 61.359
Appendix A to Part 61
Appendix A to Part 61
Appendix B to Part 61
Test Methods
Appendix C to Part 61
Quality Assurance Procedures
Appendix D to Part 61
Methods for Estimating Radionuclide Emissions
Appendix E to Part 61
Compliance Procedures Methods for Determining Compliance With Subpart I