Regulations last checked for updates: Jul 08, 2025

Title 40 - Protection of Environment last revised: Nov 08, 2025
  • Subpart G - Subpart G—Hydrochloric Acid Production Subcategory [Reserved]
  • Subpart J - Subpart J—Nitric Acid Production Subcategory [Reserved]
  • Subpart O - Subpart O—Sodium Carbonate Production Subcategory [Reserved]
  • Subpart R - Subpart R—Sodium Metal Production Subcategory [Reserved]
  • Subpart S - Subpart S—Sodium Silicate Production Subcategory [Reserved]
  • Subpart U - Subpart U—Sulfuric Acid Production Subcategory [Reserved]
  • Subpart Y - Subpart Y—Ammonium Hydroxide Production Subcategory [Reserved]
  • Subpart Z - Subpart Z—Barium Carbonate Production Subcategory [Reserved]
  • Subpart AF - Subpart AF—Carbon Dioxide Production Subcategory [Reserved]
  • Subpart AK - Subpart AK—Cuprous Oxide Production Subcategory [Reserved]
  • Subpart AM - Subpart AM—Ferrous Sulfate Production Subcategory [Reserved]
  • Subpart AT - Subpart AT—Manganese Sulfate Production Subcategory [Reserved]
  • Subpart AV - Subpart AV—Strong Nitric Acid Production Subcategory [Reserved]
  • Subpart AZ - Subpart AZ—Potassium Permanganate Production Subcategory [Reserved]
  • Subpart BD - Subpart BD—Sodium Hydrosulfide Production Subcategory [Reserved]
  • Subpart BE - Subpart BE—Sodium Hydrosulfite Production Subcategory [Reserved]
  • Subpart BF - Subpart BF—Sodium Silicofluoride Production Subcategory [Reserved]
  • Subpart BG - Subpart BG—Sodium Thiosulfate Production Subcategory [Reserved]
  • Subpart BI - Subpart BI—Sulfur Dioxide Production Subcategory [Reserved]
  • Subpart BJ - Subpart BJ—Zinc Oxide Production Subcategory [Reserved]
source: 47 FR 28278, June 29, 1982, unless otherwise noted.