---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchN/part415/subpartAU"
level: "subpart"
label: "Subpart AU"
heading: "Nickel Salts Production Subcategory"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchN-part415-subpartAU"
sections_count: 8
---

# Subpart AU — Nickel Salts Production Subcategory

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter N — Effluent Guidelines and Standards › Part 415 — Inorganic Chemicals Manufacturing Point Source Category

## Sections

- [§415.470. Applicability; description of the nickel salts production subcategory.](/cfr/40/415.470.md)
- [§415.471. Specialized definitions.](/cfr/40/415.471.md)
- [§415.472. Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).](/cfr/40/415.472.md)
- [§415.473. Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).](/cfr/40/415.473.md)
- [§415.474. Pretreatment standards for existing sources (PSES).](/cfr/40/415.474.md)
- [§415.475. New source performance standards (NSPS).](/cfr/40/415.475.md)
- [§415.476. Pretreatment standards for new sources (PSNS).](/cfr/40/415.476.md)
- [§415.477. Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT).](/cfr/40/415.477.md)