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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

A - Z | AA - ZZ | AAA - ZZZ | AAAA - ZZZZ | AAAAA - ZZZZZ | AAAAA - ZZZZZ | AAAAAAA - ZZZZZZ |

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 TCEQ National 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 OO5 Exit the TCEQ National Emission Standards for Tanks - Level 1
Subpart PP3 Exit the TCEQ National Emission Standards for Containers
Subpart QQ5 Exit the TCEQ National Emission Standards for Surface Impoundments
Subpart RR3  Exit the TCEQ National Emission Standards for Individual Drain Systems
Subpart SS5 Exit the TCEQ National Emission Standards for Closed Vent Systems, Control Devices, Recovery Devices and Routing to a Fuel Gas System or a Process
Subpart TT5 Exit the TCEQ National Emission Standards for Equipment Leaks - Control Level 1
Subpart UU Exit the TCEQ National Emission Standards for Equipment Leaks - Control Level 2 Standards
Subpart VV5 Exit the TCEQ National Emission Standards for Oil-Water Separators and Organic-Water Separators
Subpart WW5 Exit the TCEQ National Emission Standards for Storage Vessels (Tanks) - Control Level 2
Subpart XX5 Exit 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 TCEQ National 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 TCEQ National 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 ZZZZ  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 BBBBB2Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Semiconductor Manufacturing
Subpart CCCCC2Exit the TCEQ National Emission Standard for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks
Subpart DDDDD4Exit the TCEQ National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters
Subpart EEEEE2Exit 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 KKKKK Exit 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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