---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchD/part116"
level: "part"
label: "Part 116"
heading: "Designation of Hazardous Substances"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchD-part116"
sections_count: 4
---

# Part 116 — Designation of Hazardous Substances

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

## Sections

- [§116.1. Applicability.](/cfr/40/116.1.md)
- [§116.2. Abbreviations.](/cfr/40/116.2.md)
- [§116.3. Definitions.](/cfr/40/116.3.md)
- [§116.4. Designation of hazardous substances.](/cfr/40/116.4.md)