---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchA/part1/subpartB"
level: "subpart"
label: "Subpart B"
heading: "Headquarters"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchA-part1-subpartB"
sections_count: 15
---

# Subpart B — Headquarters

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter A — General › Part 1 — Statement of Organization and General Information

## Sections

- [§1.21. General.](/cfr/40/1.21.md)
- [§1.23. Office of the Administrator.](/cfr/40/1.23.md)
- [§1.25. Staff offices.](/cfr/40/1.25.md)
- [§1.27. Offices of the Associate Administrators.](/cfr/40/1.27.md)
- [§1.29. Office of Inspector General.](/cfr/40/1.29.md)
- [§1.31. Office of General Counsel.](/cfr/40/1.31.md)
- [§1.33. Office of Administration and Resources Management.](/cfr/40/1.33.md)
- [§1.35. Office of Enforcement and Compliance Monitoring.](/cfr/40/1.35.md)
- [§1.37. Office of External Affairs.](/cfr/40/1.37.md)
- [§1.39. Office of Policy, Planning and Evaluation.](/cfr/40/1.39.md)
- [§1.41. Office of Air and Radiation.](/cfr/40/1.41.md)
- [§1.43. Office of Chemical Safety and Pollution Prevention.](/cfr/40/1.43.md)
- [§1.45. Office of Research and Development.](/cfr/40/1.45.md)
- [§1.47. Office of Land and Emergency Management.](/cfr/40/1.47.md)
- [§1.49. Office of Water.](/cfr/40/1.49.md)