---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI"
level: "chapter"
label: "Chapter I"
heading: "Environmental Protection Agency"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI"
sections_count: 24430
---

# Chapter I — Environmental Protection Agency

Title 40 C.F.R. — Protection of Environment

## Contents

- [Subchapter A — General](/cfr/40/chI-subchA.md)
- [Subchapter B — Grants and Other Federal Assistance](/cfr/40/chI-subchB.md)
- [Subchapter C — Air Programs](/cfr/40/chI-subchC.md)
- [Subchapter D — Water Programs](/cfr/40/chI-subchD.md)
- [Subchapter E — Pesticide Programs](/cfr/40/chI-subchE.md)
- [Subchapter F — Radiation Protection Programs](/cfr/40/chI-subchF.md)
- [Subchapter G — Noise Abatement Programs](/cfr/40/chI-subchG.md)
- [Subchapter H — Ocean Dumping](/cfr/40/chI-subchH.md)
- [Subchapter I — Solid Wastes](/cfr/40/chI-subchI.md)
- [Subchapter J — Superfund, Emergency Planning, and Community Right-To-Know Programs](/cfr/40/chI-subchJ.md)
- [Subchapter N — Effluent Guidelines and Standards](/cfr/40/chI-subchN.md)
- [Subchapter O — Sewage Sludge](/cfr/40/chI-subchO.md)
- [Subchapter P — Subchapter P [reserved]](/cfr/40/chI-subchP.md)
- [Subchapter Q — Energy Policy](/cfr/40/chI-subchQ.md)
- [Subchapter R — Toxic Substances Control Act](/cfr/40/chI-subchR.md)
- [Subchapter S-T — Subchapters S-T [reserved]](/cfr/40/chI-subchS-T.md)
- [Subchapter U — Air Pollution Controls](/cfr/40/chI-subchU.md)