40 CFR § 421.20 Nonferrous Metals Manufacturing Point Source Category

§ 421.20 Applicability: description of the primary aluminum smelting subcategory.

Current through Aug 22, 2025 · Read all of Part 421

The provisions of this subpart are applicable to discharges resulting from the production of aluminum from alumina in the Hall-Heroult process.

← § 421.16 Pretreatment standards for new sources.§ 421.21 Specialized definitions. →