---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchN/part437"
level: "part"
label: "Part 437"
heading: "The Centralized Waste Treatment Point Source Category"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchN-part437"
sections_count: 33
---

# Part 437 — The Centralized Waste Treatment Point Source Category

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter N — Effluent Guidelines and Standards

## Sections

- [§437.1. General applicability.](/cfr/40/437.1.md)
- [§437.2. General definitions.](/cfr/40/437.2.md)
- [§437.3. General pretreatment standards.](/cfr/40/437.3.md)
- [§437.4. Monitoring requirements.](/cfr/40/437.4.md)

## Contents

- [Subpart A — Metals Treatment and Recovery](/cfr/40/chI-subchN-part437-subpartA.md)
- [Subpart B — Oils Treatment and Recovery](/cfr/40/chI-subchN-part437-subpartB.md)
- [Subpart C — Organics Treatment and Recovery](/cfr/40/chI-subchN-part437-subpartC.md)
- [Subpart D — Multiple Wastestreams](/cfr/40/chI-subchN-part437-subpartD.md)