Metal FabricationThe following information applies to facilities affected by the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Metal Fabrication and Finishing Source Categories NESHAP (40 CFR Part 63, Subpart XXXXXX) referred to here as "6X." The 6X NESHAP applies to facilities that are area sources of hazardous air pollutants (HAP) where the primary activity is one of nine metal fabrication and finishing source categories.

Applicability and Basic Requirements for Compliance

In conjunction with the Iowa Department of Natural Resources, the IWRC completed online presentations to assist facilities in determining if they will be regulated by this rule. The presentations provide the needed information for a facility to determine if they will have to comply with the 6X regulation.


  • Iowa DNR Initial Notification Form (PDF) / (DOC)
  • Iowa DNR Notification of Compliance Form (PDF) / (DOC)
  • DUE ANNUALLY ON JANUARY 31 - Annual Certification and Compliance Form (DOC)

Additional Information

  • EPA 6X Area Source Rule Requirement Flowcharts (PDF)
  • Method 22 Visible Emissions Monitoring Instruction (PDF)
  • SIC/NAICS codes applicable to 6X rule (EXCEL)