EPA places standards, or requirements, on categories of stationary sources that emit (or have the potential to emit) one or more hazardous air pollutants (HAPs). EPA listed these standards, called National Emission Standards for Hazardous Air Pollutants (NESHAP) standards, and which agency enforces the standards in tables published in the Federal Register, 80 FR 10596, Feb. 27, 2015.

  • Major source of hazardous air pollutants: Refers to any stationary source or group of stationary sources that emits or has the potential to emit 10 tons per year of any of the named HAPs, or 25 tons per year of a mixture of pollutants.
  • Area source of hazardous air pollutants: Refers to facilities that release smaller quantities of toxic air pollutants. Although emission from one area source may be relatively small, multiple area sources concern environmental specialists, especially when they are in densely populated areas.

EPA places NESHAP Area Source Standards on area sources to minimize emissions, which reduces the hazardous area pollutants released by the area sources. These requirements call for specific management practices and generally available control technologies (GACT). These technologies consist of methods, practices and techniques applicable to area sources. When EPA developed these technologies, staff members considered the economic impact as well as the technical abilities of employees to operate and maintain systems for emission control.

Missouri's Area Source Requirements

The Missouri Department of Natural Resources is conducting compliance and enforcement activities for area source requirements in the following table. For questions regarding standards, compliance and reports about area sources, please contact the agency listed as “Regulating Agency” in the table. If you need help navigating the requirements, contact the department's Air Pollution Control Program. The department recommends that facilities submit notifications and other required reports about area sources to the department's Air Pollution Control Program and EPA Region 7 Air Technology Standards Contacts.

Online Compliance Resources

Regulating Agency Description 40 CFR 63 Subpart Title V Permit Keywords Rule and Implementation Information Regulation Helpful Link
EPA Acrylic and Modacrylic Fibers Production (6L) - LLLLLL Exempt acrylic fibers Acrylic and Modacrylic Fibers Production: NESHAP 40 C.F.R. Part 63 Subpart LLLLLL
EPA Aluminum, Copper and Other Nonferrous Foundries (6Z) - ZZZZZZ Exempt aluminum, copper Aluminum, Copper and Other Nonferrous Foundries: NESHAP 40 C.F.R. Part 63 Subpart ZZZZZZ
EPA Asphalt Processing and Asphalt Roofing Manufacturing (7A) - AAAAAAA Exempt asphalt Asphalt Processing and Asphalt Roofing Manufacturing: NESHAP 40 C.F.R. Part 63 Subpart AAAAAAA
EPA Carbon Black Production (6M) MMMMMM Major Permit Carbon Black Carbon Black Production Area Sources: NESHAP 40 C.F.R. Part 63 Subpart MMMMMM
EPA Chemical Manufacturing Area Sources (6V) VVVVVV Maybe agricultural chemicals , pesticide, cyclic crude, industrial inorganic chemical, industrial organic chemical, inorganic pigments, organic chemicals, pharmacutical, plastics, resins, synthetic rubber Chemical Manufacturing Area Sources: NESHAP 40 C.F.R. Part 63 Subpart VVVVVV
EPA Chemical Manufacturing Area Sources: Chromium Compounds (6N) - NNNNNN Major Permit chromium, chromium manufacturing Chromium Compounds: NESHAP 40 C.F.R. Part 63 Subpart NNNNNN
EPA Chemical Preparations Industry (7B) - BBBBBBB Exempt chemical Chemical Preparations Industry: NESHAP 40 C.F.R. Part 63 Subpart BBBBBBB
EPA Clay Ceramics Manufacturing Industry (6R) - RRRRRR Exempt ceramics Clay Ceramics Manufacturing Area Sources: NESHAP 40 C.F.R. Part 63 Subpart RRRRRR
MoDNR Coke Oven Batteries (1L) - L Major Permit coke ovens Coke Ovens Batteries: NESHAP 40 C.F.R. Part 63 Subpart L
MoDNR Dry Cleaning Facilities (Major and area sources) (1M) - M Exempt dry cleaning Dry Cleaning Facilities: National Perchloroethylene Air Emission Standards 40 C.F.R. Part 63 Subpart M Dry Cleaners
EPA Electric Arc Furnaces Steelmaking Facilities (5Y) - YYYYY Major Permit steel Electric Arc Furnace Steelmaking Facilities: NESHAP 40 C.F.R. Part 63 Subpart YYYYY
MoDNR Ethylene Oxide Emissions Standards for Sterilization Facilities (Major and area sources) (1O) - O Exempt ethylene oxide Ethylene Oxide Emissions Standards for Sterilization Facilities: NESHAP 40 C.F.R. Part 63 Subpart O
EPA Ferroalloys Production Facilities (6Y) - YYYYYY Exempt ferroalloy Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart YYYYYY
EPA Flexible Polyurethane Foam Production & Fabrication Industry (6O) - OOOOOO Exempt polyurethane foam Flexible Polyurethane Foam Production and Fabrication: NESHAP 40 C.F.R. Part 63 Subpart OOOOOO
EPA Gasoline Dispensing Facilities (6C) - CCCCCC Exempt gasoline Gasoline Distribution MACT and GACT: NESHAP 40 C.F.R. Part 63 Subpart CCCCCC
EPA Gasoline Distribution (6B) - BBBBBB Exempt gasoline Gasoline Distribution MACT and GACT: NESHAP 40 C.F.R. Part 63 Subpart BBBBBB
EPA Glass Manufacturing Industry (6S) - SSSSSS Major Permit glass Glass Manufacturing Area Sources: NESHAP 40 C.F.R. Part 63 Subpart SSSSSS
EPA Gold Mine Ore Processing and Production (7E) - EEEEEEE Major Permit gold mine Gold Mine Ore Processing and Production: NESHAP 40 C.F.R. Part 63 Subpart EEEEEEE
MoDNR Halogenated Solvent Cleaning (Major and area sources) (1T) - T Exempt solvent cleaning Clean Air Act Guidelines and Standards for Solvent Use and Surface Coating Indu… 40 C.F.R. Part 63 Subpart T
MoDNR Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks (Major and area sources) (1N) - N Exempt chromium, chromic acid, chromium electroplating Chromium Electroplating: NESHAP 40 C.F.R. Part 63 Subpart N