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 75 Continuous Emission Monitoring 75.1 – 75.75
Subpart A General 75.1 – 75.8
Subpart B Monitoring Provisions 75.10 – 75.19
Subpart C Operation and Maintenance Requirements 75.20 – 75.24
§ 75.20 Initial certification and recertification procedures.
§ 75.21 Quality assurance and quality control requirements.
§ 75.22 Reference test methods.
§ 75.23 Alternatives to standards incorporated by reference.
§ 75.24 Out-of-control periods and adjustment for system bias.
Subpart D Missing Data Substitution Procedures 75.30 – 75.39
Subpart E Alternative Monitoring Systems 75.40 – 75.48
Subpart F Recordkeeping Requirements 75.50 – 75.59
Subpart G Reporting Requirements 75.60 – 75.68
Subpart H NOX Mass Emissions Provisions 75.70 – 75.75
Appendix A to Part 75
Specifications and Test Procedures
Appendix B to Part 75
Quality Assurance and Quality Control Procedures
Appendix C to Part 75
Missing Data Estimation Procedures
Appendix D to Part 75
Optional SO2 Emissions Data Protocol for Gas-Fired and Oil-Fired Units
Appendix E to Part 75
Optional NOX Emissions Estimation Protocol for Gas-Fired Peaking Units and Oil-Fired Peaking Units
Appendix F to Part 75
Conversion Procedures
Appendix G to Part 75
Determination of CO2 Emissions
Appendix H to Part 75 - Revised Traceability Protocol No. 1 [Reserved]
Appendix I to Part 75 - Optional F - Factor/Fuel Flow Method [Reserved]
Appendix J to Part 75 - Compliance Dates for Revised Recordkeeping Requirements and Missing Data Procedures [Reserved]