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Title 40

Displaying title 40, up to date as of 9/21/2021. Title 40 was last amended 9/21/2021.
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Title 40 Protection of Environment Part / Section
Chapter I Environmental Protection Agency 1 – 1099
Subchapter C Air Programs 50 – 99
Part 51 Requirements for Preparation, Adoption, and Submittal of Implementation Plans 51.1 – 51.1319
Subpart A Air Emissions Reporting Requirements 51.1 – 51.50
Subparts B-E [Reserved]
Subpart F Procedural Requirements 51.100 – 51.105
Subpart G Control Strategy 51.110 – 51.126
Subpart H Prevention of Air Pollution Emergency Episodes 51.150 – 51.153
Subpart I Review of New Sources and Modifications 51.160 – 51.166
Subpart J Ambient Air Quality Surveillance 51.190
Subpart K Source Surveillance 51.210 – 51.214
Subpart L Legal Authority 51.230 – 51.232
Subpart M Intergovernmental Consultation 51.240 – 51.242
Subpart N Compliance Schedules 51.260 – 51.262
Subpart O Miscellaneous Plan Content Requirements 51.280 – 51.286
Subpart P Protection of Visibility 51.300 – 51.309
Subpart Q Reports 51.320 – 51.328
Subpart R Extensions 51.341
Subpart S Inspection/Maintenance Program Requirements 51.350 – 51.373
Subpart T Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Developed, Funded or Approved Under Title 23 U.S.C. or the Federal Transit Laws 51.390
Subpart U Economic Incentive Programs 51.490 – 51.494
Subpart W Determining Conformity of General Federal Actions to State or Federal Implementation Plans 51.850 – 51.860
Subpart X Provisions for Implementation of 8-hour Ozone National Ambient Air Quality Standard 51.900 – 51.919
Subpart Y Mitigation Requirements 51.930
Subpart Z Provisions for Implementation of PM2.5 National Ambient Air Quality Standards 51.1000 – 51.1016
Subpart AA Provisions for Implementation of the 2008 Ozone National Ambient Air Quality Standards 51.1100 – 51.1119
Subpart BB Data Requirements for Characterizing Air Quality for the Primary SO2 NAAQS 51.1200 – 51.1205
Subpart CC Provisions for Implementation of the 2015 Ozone National Ambient Air Quality Standards 51.1300 – 51.1319
Appendixes A-K to Part 51 [Reserved]
Appendix L to Part 51
Example Regulations for Prevention of Air Pollution Emergency Episodes
Appendix M to Part 51
Recommended Test Methods for State Implementation Plans
Appendixes N-O to Part 51 [Reserved]
Appendix P to Part 51
Minimum Emission Monitoring Requirements
Appendixes Q-R to Part 51 [Reserved]
Appendix S to Part 51
Emission Offset Interpretative Ruling
Appendixes T-U to Part 51 [Reserved]
Appendix V to Part 51
Criteria for Determining the Completeness of Plan Submissions
Appendix W to Part 51
Guideline on Air Quality Models
Appendix X to Part 51
Examples of Economic Incentive Programs
Appendix Y to Part 51
Guidelines for BART Determinations Under the Regional Haze Rule