---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchD/part122"
level: "part"
label: "Part 122"
heading: "Epa Administered Permit Programs: the National Pollutant Discharge Elimination System"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchD-part122"
sections_count: 39
---

# Part 122 — Epa Administered Permit Programs: the National Pollutant Discharge Elimination System

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter D — Water Programs

## Contents

- [Subpart A — Definitions and General Program Requirements](/cfr/40/chI-subchD-part122-subpartA.md)
- [Subpart B — Permit Application and Special NPDES Program Requirements](/cfr/40/chI-subchD-part122-subpartB.md)
- [Subpart C — Permit Conditions](/cfr/40/chI-subchD-part122-subpartC.md)
- [Subpart D — Transfer, Modification, Revocation and Reissuance, and Termination of Permits](/cfr/40/chI-subchD-part122-subpartD.md)