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You are here: Home / Permitting / Air Permits / Rules / Federal Title 40: Protection of Environment / Part 63 - National Emission Standards for Hazardous Air Pollutants for Source Categories (MACT) / 40 CFR Part 63 - National Emission Standards for Hazardous Air Pollutants for Source Categories (a.k.a. Maximum Achievable Control Technology (MACT))

40 CFR Part 63 - National Emission Standards for Hazardous Air Pollutants for Source Categories (a.k.a. Maximum Achievable Control Technology (MACT))

A listing of 40 CFR Part 63 Subparts. Each subpart has Decision Support System components specific to that portion of the regulations.

This page contains a listing of 40 CFR Part 63 Subparts. Each subpart has Decision Support System components specific to that portion of the regulations. Select a subpart letter from the Table below, or scroll down to see a listing of 40 CFR 63 Subparts.

The following numbers indicate only if rule text and/or historic rule opinions are available for the respective subpart, and explain why flowcharts and requirement reference table (RRT) are not included.
" 1 " RRT and flowcharts will not be developed for general provisions or emission guidelines.
" 2 " RRT and flow charts will not be developed for these rules because there are less than 5 sites in Texas.
" 3 " RRT and flow charts will not be developed for these rules because they are sitewide requirements.
" 4 " RRT and flowcharts for these rules are currently in development and will be provided as they are finalized.
" 5 " RRT and flowcharts will not be development for these subparts because they are referenced subparts.

Titles of 40 CFR Part 63 Subparts

  • Subpart A - General Provisions
  • Subpart B1 Exit the TCEQ Requirements for Control Technology Determinations for Major Sources in Accordance With Clean Air Act Sections, Sections 112(g) and 112(j)
  • Subpart C1 Exit the TCEQ List of Hazardous Air Pollutants, Petition Process, Lesser Quantity Designations, Source Category List
  • Subpart D1 Exit the TCEQ Regulations Governing Compliance Extensions for Early Reductions of Hazardous Air Pollutants
  • Subpart E1 Exit the TCEQ Approval of State Programs and Delegation of Federal Authorities
  • Subpart F - National Emission Standards for Organic Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry
  • Subpart G - National Emission Standards for Organic Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry Process Vents, Storage Vessels, Transfer Operations, and Wastewater
  • Subpart H - National Emission Standards for Organic Hazardous Air Pollutants for Equipment Leaks
  • Subpart I - National Emission Standards for Organic Hazardous Air Pollutants for Certain Processes Subject to the Negotiated Regulation for Equipment Leaks
  • Subpart J Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Polyvinyl Chloride and Copolymers Production (This subpart has been vacated by court action)
  • Subpart K - [Reserved]
  • Subpart L2 Exit the TCEQ National Emission Standards for Coke Oven Batteries
  • Subpart M2 Exit the TCEQ - National Perchloroethylene Air Emission Standards for Dry Cleaning Facilities
  • Subpart N - National Emission Standards for Chromium Emissions From Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks
  • Subpart O - Ethylene Oxide Emissions Standards for Sterilization Facilities
  • Subpart P - [Reserved]
  • Subpart Q - National Emission Standards for Hazardous Air Pollutants for Industrial Process Cooling Towers
  • Subpart R - National Emission Standards for Gasoline Distribution Facilities (Bulk Gasoline Terminals and Pipeline Breakout Stations)
  • Subpart S - National Emission Standards for Hazardous Air Pollutants from the Pulp and Paper Industry
  • Subpart T - National Emission Standards for Halogenated Solvent Cleaning
  • Subpart U - National Emission Standards for Hazardous Air Pollutant Emissions: Group I Polymers and Resins
  • Subpart V - [Reserved]
  • Subpart W - National Emission Standards for Hazardous Air Pollutants for Epoxy Resins Production and Non-Nylon Polyamides Production
  • Subpart X - National Emission Standards for Hazardous Air Pollutants from Secondary Lead Smelting
  • Subpart Y - National Emission Standards for Marine Tank Vessel Loading Operations
  • Subpart Z - [Reserved]
  • Subpart AA2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants From Phosphoric Acid Manufacturing Plants
  • Subpart BB2 Exit the TCEQNational Emission Standards for Hazardous Air Pollutants From Phosphate Fertilizers Production Plants
  • Subpart CC - National Emission Standards for Hazardous Air Pollutants From Petroleum Refineries
  • Subpart DD - National Emission Standards for Hazardous Air Pollutants from Off-Site Waste and Recovery Operations
  • Subpart EE2 Exit the TCEQ National Emission Standards for Magnetic Tape Manufacturing Operations
  • Subpart FF - [Reserved]
  • Subpart GG - National Emission Standards for Aerospace Manufacturing and Rework Facilities
  • Subpart HH - National Emission Standards for Hazardous Air Pollutants From Oil and Natural Gas Production Facilities (Area Source Applicability)
  • Subpart II - National Emission Standards for Shipbuilding and Ship Repair (Surface Coating)
  • Subpart JJ - National Emission Standards for Wood Furniture Manufacturing Operations
  • Subpart KK - National Emission Standard for the Printing and Publishing Industry
  • Subpart LL2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Primary Aluminum Reduction Plants
  • Subpart MM - National Emission Standard for Hazardous Air Pollutants for Chemical Recovery Combustion Sources at Kraft, Soda, Sulfite, and Stand-Alone Semichemical Pulp Mills
  • Subpart OO5Exit the TCEQ - National Emission Standards for Tanks - Level 1
  • Subpart PP3 Exit the TCEQ National Emission Standards for Containers
  • Subpart QQ5Exit the TCEQ - National Emission Standards for Surface Impoundments
  • Subpart RR3 Exit the TCEQ National Emission Standards for Individual Drain Systems
  • Subpart SS5Exit the TCEQ National Emission Standards for Closed Vent Systems, Control Devices, Recovery Devices and Routing to a Fuel Gas System or a Process
  • Subpart TT5Exit the TCEQ National Emission Standards for Equipment Leaks - Control Level 1
  • Subpart UUExit the TCEQ National Emission Standards for Equipment Leaks - Control Level 2 Standards
  • Subpart VV5Exit the TCEQ National Emission Standards for Oil-Water Separators and Organic-Water Separators
  • Subpart WW5Exit the TCEQ National Emission Standards for Storage Vessels (Tanks) - Control Level 2
  • Subpart XX5Exit the TCEQ National Emission Standards For Ethylene Manufacturing Process Units: Heat Exchange Systems and Waste Operations
  • Subpart YY4 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Source Categories: Generic Maximum Achievable Control Technology Standards
  • Subpart ZZ - [Reserved]
  • Subpart AAA - [Reserved]
  • Subpart BBB - [Reserved]
  • Subpart CCC2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Steel Pickling--HCl Process Facilities and Hydrochloric Acid Regeneration Plants
  • Subpart DDD2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Mineral Wool Production
  • Subpart EEE National Emission Standard for Hazardous Air Pollutants from Hazardous Waste Combustors
  • Subpart FFF - [Reserved]
  • Subpart GGG2 Exit the TCEQ National Emission Standards Pharmaceuticals Production
  • Subpart HHH2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants From Natural Gas Transmission and Storage Facilities
  • Subpart III - National Emission Standards for Hazardous Air Pollutants for Flexible Polyurethane Foam Production
  • Subpart JJJ National Emission Standard for Hazardous Air Pollutant Emissions: Group IV Polymers and Resins
  • Subpart KKK - [Reserved]
  • Subpart LLL - National Emission Standards for Hazardous Air Pollutants From the Portland Cement Manufacturing Industry
  • Subpart MMM4 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Pesticide Active Ingredient Production
  • Subpart NNN2 Exit the TCEQNational Emission Standards for Hazardous Air Pollutants for Wool Fiberglass Manufacturing
  • Subpart OOO2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants Emissions: Manufacture of Amino/Phenolic Resins
  • Subpart PPP2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants Emissions for Polyether Polyols Production
  • Subpart QQQ2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Primary Copper Smelting
  • Subpart RRR2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Secondary Aluminum Production
  • Subpart SSS - [Reserved]
  • Subpart TTT2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Primary Lead Smelting
  • Subpart UUU National Emission Standards for Hazardous Air Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units.
  • Subpart VVV2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Publicly Owned Treatment Works
  • Subpart WWW - [Reserved]
  • Subpart XXX2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Ferroalloys Production: Ferromanganese and Silicomanganese
  • Subpart AAAA - National Emission Standard for Hazardous Air Pollutants: Municipal Solid Waste Landfills
  • Subpart CCCC2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Manufacturing of Nutritional Yeast
  • Subpart DDDD4 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Plywood and Composite Wood Products
  • Subpart EEEE4 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Organic Liquids Distribution (Non-Gasoline)
  • Subpart FFFF - National Emission Standard for Hazardous Air Pollutants: Miscellaneous Organic Chemical Manufacturing
  • Subpart GGGG - National Emission Standard for Hazardous Air Pollutants: Solvent Extractions for Vegetable Oil Production
  • Subpart HHHH2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Wet-Formed Fiberglass Mat Production
  • Subpart IIII2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Surface Coating of Automobiles and Light-Duty Trucks
  • Subpart JJJJ2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Paper and Other Web Coating
  • Subpart KKKK2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Surface Coating of Metal Cans
  • Subpart MMMM4 Exit the TCEQNational Emission Standard for Hazardous Air Pollutants for Surface Coating of Miscellaneous Metal Parts and Products
  • Subpart NNNN2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Surface Coating of Large Appliances
  • Subpart OOOO2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Printing, Coating, and Dyeing of Fabrics and Other Textiles
  • Subpart PPPP - National Emission Standards for Hazardous Air Pollutants for Surface Coating of Plastic Parts and Products
  • Subpart QQQQ4 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Surface Coating of Wood Building Products
  • Subpart RRRR2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Surface Coating of Metal Furniture
  • Subpart SSSS2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Surface Coating of Metal Coil
  • Subpart TTTT2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Leather Finishing Operations
  • Subpart UUUU2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Cellulose Products Manufacturing
  • Subpart VVVV2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Boat Manufacturing
  • Subpart WWWW4 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Reinforced Plastic Composites Production
  • Subpart XXXX2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Rubber Tire Manufacturing
  • Subpart YYYY - National Emission Standard for Hazardous Air Pollutants for Stationary Combustion Turbines
  • Subpart ZZZZ4 Exit the TCEQ - National Emission Standard for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines
  • Subpart AAAAA2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Lime Manufacturing Plants
  • Subpart BBBBB2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Semiconductor Manufacturing
  • Subpart CCCCC2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks
  • Subpart DDDDD4 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters
  • Subpart EEEEE2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Iron and Steel Foundries
  • Subpart FFFFF2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities
  • Subpart GGGGG4 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Site Remediation
  • Subpart HHHHH2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Miscellaneous Coating Manufacturing
  • Subpart IIIII2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Mercury Emissions From Mercury Cell Chlor-Alkali Plants
  • Subpart JJJJJ Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Brick and Structural Clay Products Manufacturing (This subpart has been vacated by court action)
  • Subpart KKKKKExit the TCEQ National Emission Standard for Hazardous Air Pollutants for Clay Ceramics Manufacturing (This subpart has been vacated by court action)
  • Subpart LLLLL - National Emission Standard for Hazardous Air Pollutants: Asphalt Processing and Asphalt Roofing Manufacturing
  • Subpart MMMMM2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Flexible Polyurethane Foam Fabrication Operations
  • Subpart NNNNN2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Hydrochloric Acid Production
  • Subpart OOOOO - [Reserved]
  • Subpart PPPPP2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Engine Test Cells/Stands
  • Subpart QQQQQ2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Friction Materials Manufacturing Facilities
  • Subpart RRRRR2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants: Taconite Iron Ore Processing
  • Subpart SSSSS2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Refractory Products Manufacturing
  • Subpart TTTTT2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Primary Magnesium Refining
  • Subpart UUUUU4 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units
  • Subpart VVVVV - - [Reserved]
  • Subpart WWWWW2 Exit the TCEQ National Emission Standards for Hospital Ethylene Oxide Sterilizers
  • Subpart XXXXX - [Reserved]
  • Subpart YYYYY2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Area/Sources: Electric Arc Furnace Steelmaking Facilities
  • Subpart ZZZZZ2 Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Iron and Steel Foundries Area Sources
  • Subpart AAAAAA - [Reserved]
  • Subpart BBBBBB4 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Source Category: Gasoline Distribution Bulk Terminals, Bulk Plants, and Pipeline Facilities
  • Subpart CCCCCC - National Emission Standards for Hazardous Air Pollutants for Source Category: Gasoline Dispensing Facilities
  • Subpart DDDDDD2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Polyvinyl Chloride and Copolymers Production Area Sources
  • Subpart EEEEEE2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Primary Copper Smelting Area Sources
  • Subpart FFFFFF2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Secondary Copper Smelting Area Sources
  • Subpart GGGGGG2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Primary Nonferrous Metals Area Sources—Zinc, Cadmium, and Beryllium
  • Subpart HHHHHH2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants: Paint Stripping and Miscellaneous Surface Coating Operations at Area Sources
  • Subpart IIIIII - [Reserved]
  • Subpart JJJJJJ4 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers Area Sources
  • Subpart KKKKKK - [Reserved]
  • Subpart LLLLLL2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Acrylic and Modacrylic Fibers Production Area Sources
  • Subpart MMMMMM2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Carbon Black Production Area Sources
  • Subpart NNNNNN2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources: Chromium Compounds
  • Subpart OOOOOO2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Flexible Polyurethane Foam Production and Fabrication Area Sources
  • Subpart PPPPPP2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Lead Acid Battery Manufacturing Area Sources
  • Subpart QQQQQQ2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Wood Preserving Area Sources
  • Subpart RRRRRR2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Clay Ceramics Manufacturing Area Sources
  • Subpart SSSSSS2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Glass Manufacturing Area Sources
  • Subpart TTTTTT2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Secondary Nonferrous Metals Processing Area Sources
  • Subpart UUUUUU - [Reserved]
  • Subpart VVVVVV4 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources
  • Subpart WWWWWW2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants: Area Source Standards for Plating and Polishing Operations
  • Subpart XXXXXX2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants Area Source Standards for Nine Metal Fabrication and Finishing Source Categories
  • Subpart YYYYYY1 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Area Sources: Ferroalloys Production Facilities
  • Subpart ZZZZZZ2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants Area Source Standards for Aluminum, Copper, and Other Nonferrous Foundries
  • Subpart AAAAAAA2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Area Sources: Asphalt Processing and Asphalt Roofing Manufacturing
  • Subpart BBBBBBB2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Area Sources: Chemical Preparations Industry
  • Subpart CCCCCCC2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Area Sources: Paints and Allied Products Manufacturing
  • Subpart DDDDDDD2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants: Area Source Standards for Prepared Feeds Manufacturing
  • Subpart EEEEEEE2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutants: Gold Mine Ore Processing and Production Area Source Category
  • Subpart HHHHHHH 2 Exit the TCEQ National Emission Standards for Hazardous Air Pollutant Emissions for Polyvinyl Chloride and Copolymers Production

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