CFR›Title 40›Chapter I›Part 127›Subpart A ContainsSections 127.1–127.2CorpusDaily eCFRDisplayed edition2026-07-09Last updated2026-07-09 Subpart A—General Sections 127.1 § 127.1 Purpose and scope. 127.2 § 127.2 Definitions. Next Appendix A to Part 127 Appendix A to Part 127—Minimum Set of NPDES Data