Federal (United States) · Regulations
Part 421 — NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
199 sections
31 groups
- Subpart A — Bauxite Refining Subcategory6 sections
- Subpart AA — Secondary Tin Subcategory7 sections
- Subpart AB — Primary and Secondary Titanium Subcategory7 sections
- Subpart AC — Secondary Tungsten and Cobalt Subcategory7 sections
- Subpart AD — Secondary Uranium Subcategory6 sections
- Subpart AE — Primary Zirconium and Hafnium Subcategory6 sections
- Subpart B — Primary Aluminum Smelting Subcategory6 sections
- Subpart G — Primary Lead Subcategory7 sections
- Subpart J — Primary Tungsten Subcategory7 sections
- Subpart K — Primary Columbium-Tantalum Subcategory7 sections
- Subpart L — Secondary Silver Subcategory7 sections
- Subpart C — Secondary Aluminum Smelting Subcategory7 sections
- Subpart D — Primary Copper Smelting Subcategory6 sections
- Subpart E — Primary Electrolytic Copper Refining Subcategory6 sections
- Subpart F — Secondary Copper Subcategory7 sections
- Subpart H — Primary Zinc Subcategory7 sections
- Subpart I — Metallurgical Acid Plants Subcategory7 sections
- Subpart M — Secondary Lead Subcategory7 sections
- Subpart N — Primary Antimony Subcategory6 sections
- Subpart O — Primary Beryllium Subcategory6 sections
- Subpart P — Primary and Secondary Germanium and Gallium Subcategory7 sections
- Subpart Q — Secondary Indium Subcategory5 sections
- Subpart R — Secondary Mercury Subcategory4 sections
- Subpart S — Primary Molybdenum and Rhenium Subcategory6 sections
- Subpart T — Secondary Molybdenum and Vanadium Subcategory6 sections
- Subpart U — Primary Nickel and Cobalt Subcategory6 sections
- Subpart V — Secondary Nickel Subcategory5 sections
- Subpart W — Primary Precious Metals and Mercury Subcategory6 sections
- Subpart X — Secondary Precious Metals Subcategory7 sections
- Subpart Y — Primary Rare Earth Metals Subcategory5 sections
- Subpart Z — Secondary Tantalum Subcategory6 sections