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 Wool Fiberglass Manufacturing (Area sources) (2N) - NN Major Permit fiberglass, wool fiberglass Wool Fiberglass Manufacturing at Area Sources: NESHAP 40 C.F.R. Part 63 Subpart NN
EPA Wood Preserving Industry (6Q) - QQQQQQ Exempt wood preserving Wood Preserving Area Sources: NESHAP 40 C.F.R. Part 63 Subpart QQQQQQ
EPA Secondary Nonferrous Metals Processing (6T) - TTTTTT Exempt nonferrous metal Secondary Nonferrous Metals Processing Area Sources: NESHAP 40 C.F.R. Part 63 Subpart TTTTTT
MoDNR Secondary Lead Smelting (Major and area sources) (1X) - X Major Permit lead Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart X
EPA Secondary Copper Smelting (6F) - FFFFFF Major Permit copper Secondary Copper Smelting Area Sources: NESHAP 40 C.F.R. Part 63 Subpart FFFFFF
MoDNR Secondary Aluminum Production (Major and area sources) (3R) - RRR Exempt aluminum Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart RRR
MoDNR Reciprocating Internal Combustion Engines (Major sources) (4Z) - ZZZZ Exempt Internal Combustion Engines Regulatory Actions for Stationary Engines 40 C.F.R. Part 63 Subpart ZZZZ
EPA Reciprocating Internal Combustion Engines (Area sources) (4Z) - ZZZZ Exempt Internal Combustion Engines Regulatory Actions for Stationary Engines 40 C.F.R. Part 63 Subpart ZZZZ
MoDNR Publicly Owned Treatment Works Regulations (Major and area sources) (3V) - VVV Exempt sewer company Publicly Owned Treatment Works (POTW): NESHAP 40 C.F.R. Part 63 Subpart VVV
MoDNR Printing and Publishing Industry (Some Major sources) (2K) - KK Major Permit Printing Clean Air Act Standards and Guidelines for Solvent Use and Surface Coating Indu… 40 C.F.R. Part 63 Subpart KK
EPA Primary Nonferrous Metals Area Sources-Zinc, Cadmium and Beryllium (6G) - GGGGGG Major Permit zinc, cadmium, beryllium Primary Nonferrous Metals (Zinc, Cadmium, and Beryllium): NESHAP 40 C.F.R. Part 63 Subpart GGGGGG
MoDNR Primary Lead Smelting (3T) - TTT Major Permit lead Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart TTT
EPA Primary Copper Smelting (6E) - EEEEEE Major Permit copper Clean Air Act Standards and Guidelines for the Metals Production Industry 40 C.F.R. Part 63 Subpart EEEEEE
EPA Prepared Feeds Manufacturing (7D) - DDDDDDD Exempt animal feed Prepared Feeds Manufacturing: NESHAP 40 C.F.R. Part 63 Subpart DDDDDDD
MoDNR Portland Cement Regulations (Major and area sources) (3L) - LLL Major Permit cement Clean Air Act Standards and Guidelines for Mineral Processing 40 C.F.R. Part 63 Subpart LLL
EPA Polyvinyl Chloride and Copolymers Production (6D) - DDDDDD Exempt polyvinyl chloride Clean Air Act Standards and Guidelines for Chemical Production and Distribution 40 C.F.R. Part 63 Subpart DDDDDD
EPA Plating and Polishing Operations (6W) - WWWWWW Exempt electroforming, electroplating, electropolishing, non-electrolytic plating, non-electrolytic metal coating Plating and Polishing: NESHAP 40 C.F.R. Part 63 Subpart WWWWWW
EPA Paints and Allied Products Manufacturing (7C) - CCCCCCC Exempt paint Paints and Allied Products Manufacturing: NESHAP 40 C.F.R. Part 63 Subpart CCCCCCC
EPA Paint Stripping and Miscellaneous Surface Coating Operations (6H) - HHHHHH Exempt paint Clean Air Act Guidelines and Standards for Solvent Use and Surface Coating Indu… 40 C.F.R. Part 63 Subpart HHHHHH About the Collision Repair Campaign
MoDNR Oil and Natural Gas Production Facilities (Major and area sources) (2H) - HH Exempt oil and natural gas Clean Air Act Standards and Guidelines for the Oil and Natural Gas Industry 40 C.F.R. Part 63 Subpart HH