---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part66"
level: "part"
label: "Part 66"
heading: "Assessment and Collection of Noncompliance Penalties by Epa"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part66"
sections_count: 37
---

# Part 66 — Assessment and Collection of Noncompliance Penalties by Epa

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

## Contents

- [Subpart A — Purpose and Scope](/cfr/40/chI-subchC-part66-subpartA.md)
- [Subpart B — Notice of Noncompliance](/cfr/40/chI-subchC-part66-subpartB.md)
- [Subpart C — Calculation of Noncompliance Penalties](/cfr/40/chI-subchC-part66-subpartC.md)
- [Subpart D — Exemption Requests; Revocation of Exemptions](/cfr/40/chI-subchC-part66-subpartD.md)
- [Subpart E — Decisions on Exemption Requests and Challenges to Notices of Noncompliance](/cfr/40/chI-subchC-part66-subpartE.md)
- [Subpart F — Review of Penalty Calculation](/cfr/40/chI-subchC-part66-subpartF.md)
- [Subpart G — Payment](/cfr/40/chI-subchC-part66-subpartG.md)
- [Subpart H — Compliance and Final Adjustment](/cfr/40/chI-subchC-part66-subpartH.md)
- [Subpart I — Final Action](/cfr/40/chI-subchC-part66-subpartI.md)
- [Subpart J — Supplemental Rules for Formal Adjudicatory Hearings](/cfr/40/chI-subchC-part66-subpartJ.md)