---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchD/part118"
level: "part"
label: "Part 118"
heading: "Clean Water Act Hazardous Substances Facility Response Plans"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchD-part118"
sections_count: 13
---

# Part 118 — Clean Water Act Hazardous Substances Facility Response Plans

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

## Sections

- [§118.1. Purpose.](/cfr/40/118.1.md)
- [§118.2. Definitions.](/cfr/40/118.2.md)
- [§118.3. Applicability.](/cfr/40/118.3.md)
- [§118.4. General requirements.](/cfr/40/118.4.md)
- [§118.5. Regional Administrator determination of substantial harm and significant and substantial harm.](/cfr/40/118.5.md)
- [§118.6. Appeals process.](/cfr/40/118.6.md)
- [§118.7. Petitions.](/cfr/40/118.7.md)
- [§118.8. Exceptions and exemptions.](/cfr/40/118.8.md)
- [§118.9. Mixtures.](/cfr/40/118.9.md)
- [§118.10. Worst case discharge.](/cfr/40/118.10.md)
- [§118.11. Facility response plan requirements.](/cfr/40/118.11.md)
- [§118.12. Coordination Activities.](/cfr/40/118.12.md)
- [§118.13. Facility response training, drills, and exercises.](/cfr/40/118.13.md)