---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part75"
level: "part"
label: "Part 75"
heading: "Continuous Emission Monitoring"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part75"
sections_count: 61
---

# Part 75 — Continuous Emission Monitoring

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

## Contents

- [Subpart A — General](/cfr/40/chI-subchC-part75-subpartA.md)
- [Subpart B — Monitoring Provisions](/cfr/40/chI-subchC-part75-subpartB.md)
- [Subpart C — Operation and Maintenance Requirements](/cfr/40/chI-subchC-part75-subpartC.md)
- [Subpart D — Missing Data Substitution Procedures](/cfr/40/chI-subchC-part75-subpartD.md)
- [Subpart E — Alternative Monitoring Systems](/cfr/40/chI-subchC-part75-subpartE.md)
- [Subpart F — Recordkeeping Requirements](/cfr/40/chI-subchC-part75-subpartF.md)
- [Subpart G — Reporting Requirements](/cfr/40/chI-subchC-part75-subpartG.md)
- [Subpart H — NO X Mass Emissions Provisions](/cfr/40/chI-subchC-part75-subpartH.md)