---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part60/subpartDb"
level: "subpart"
label: "Subpart Db"
heading: "Standards of Performance for Industrial-Commercial-Institutional Steam Generating Units"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part60-subpartDb"
sections_count: 10
---

# Subpart Db — Standards of Performance for Industrial-Commercial-Institutional Steam Generating Units

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs › Part 60 — Standards of Performance for New Stationary Sources

## Sections

- [§60.40b. Applicability and delegation of authority.](/cfr/40/60.40b.md)
- [§60.41b. Definitions.](/cfr/40/60.41b.md)
- [§60.42b. Standard for sulfur dioxide (SO 2 ).](/cfr/40/60.42b.md)
- [§60.43b. Standard for particulate matter (PM).](/cfr/40/60.43b.md)
- [§60.44b. Standard for nitrogen oxides (NO 2 ).](/cfr/40/60.44b.md)
- [§60.45b. Compliance and performance test methods and procedures for sulfur dioxide.](/cfr/40/60.45b.md)
- [§60.46b. Compliance and performance test methods and procedures for particulate matter and nitrogen oxides.](/cfr/40/60.46b.md)
- [§60.47b. Emission monitoring for sulfur dioxide.](/cfr/40/60.47b.md)
- [§60.48b. Emission monitoring for particulate matter and nitrogen oxides.](/cfr/40/60.48b.md)
- [§60.49b. Reporting and recordkeeping requirements.](/cfr/40/60.49b.md)