U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 122Subpart D - Subpart D—Transfer, Modification, Revocation and Reissuance, and Termination of Permits
§ 122.61 - Transfer of permits (applicable to State programs, see § 123.25).
§ 122.62 - Modification or revocation and reissuance of permits (applicable to State programs, see § 123.25).
§ 122.63 - Minor modifications of permits.
§ 122.64 - Termination of permits (applicable to State programs, see § 123.25).
Appendix Appendix A - Appendix A to Part 122—NPDES Primary Industry Categories
Appendix Appendix B - Appendix B to Part 122 [Reserved]
Appendix Appendix C - Appendix C to Part 122—Criteria for Determining a Concentrated Aquatic Animal Production Facility (§ 122.24)
Appendix Appendix D - Appendix D to Part 122—NPDES Permit Application Testing Requirements (§ 122.21)
Appendix Appendix E - Appendix E to Part 122—Rainfall Zones of the United States
Appendix Appendix F - Appendix F to Part 122—Incorporated Places With Populations Greater Than 250,000 According to the 1990 Decennial Census by the Bureau of the Census
Appendix Appendix G - Appendix G to Part 122—Incorporated Places With Populations Greater Than 100,000 But Less Than 250,000 According to the 1990 Decennial Census by the Bureau of the Census
Appendix Appendix H - Appendix H to Part 122—Counties With Unincorporated Urbanized Areas With a Population of 250,000 or More According to the 1990 Decennial Census by the Bureau of the Census
Appendix Appendix I - Appendix I to Part 122—Counties With Unincorporated Urbanized Areas Greater Than 100,000, But Less Than 250,000 According to the 1990 Decennial Census by the Bureau of the Census
Appendix Appendix J - Appendix J to Part 122—NPDES Permit Testing Requirements for Publicly Owned Treatment Works (§ 122.21(j))
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