---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchN/part401"
level: "part"
label: "Part 401"
heading: "General Provisions"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchN-part401"
sections_count: 8
---

# Part 401 — General Provisions

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter N — Effluent Guidelines and Standards

## Sections

- [§401.10. Scope and purpose.](/cfr/40/401.10.md)
- [§401.11. General definitions.](/cfr/40/401.11.md)
- [§401.12. Law authorizing establishment of effluent limitations guidelines for existing sources, standards of performance for new sources and pretreatment standards of new and existing sources.](/cfr/40/401.12.md)
- [§401.13. Test procedures for measurement.](/cfr/40/401.13.md)
- [§401.14. Cooling water intake structures.](/cfr/40/401.14.md)
- [§401.15. Toxic pollutants.](/cfr/40/401.15.md)
- [§401.16. Conventional pollutants.](/cfr/40/401.16.md)
- [§401.17. pH Effluent limitations under continuous monitoring.](/cfr/40/401.17.md)