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Pesticide Active Ingredient Production Industry: National Emission Standards for Hazardous Air Pollutants (NESHAP)

Pesticide Active Ingredient Production Industry: National Emission Standards for Hazardous Air Pollutants (NESHAP)
Basic Information
Legal Authorities
  • 42 U.S.C. §7401
Federal Register Citations
  • 79 FR 17340
  • 77 FR 1268
  • 67 FR 59336
  • 67 FR 38200
  • 67 FR 21579
  • 67 FR 17492
  • 67 FR 13504
  • 66 FR 58396
  • 66 FR 58393
  • 64 FR 33550
  • 62 FR 66049
  • 62 FR 60579
Code of Federal Regulations Citations
  • 40 CFR Part 63 Subpart MMM
Docket Numbers
  • EPA-HQ-OAR-2011-0435
  • EPA-HQ-OAR-2004-0388

On this page:

  • Rule Summary
  • Rule History
  • Additional Resources

Rule Summary

The intent of these standards is to reduce emissions of hazardous air pollutants (HAP) from existing and new facilities that manufacture organic pesticide active ingredients (PAI) used in herbicides, insecticides, and fungicides.

The major HAP emitted by these facilities include toluene, methanol, methyl chloride, and hydrogen chloride (HCl). All of these pollutants can cause reversible or irreversible toxic effects following exposure.

The rule reduces total HAP emissions from existing facilities and, because many of these pollutants are also volatile organic compounds (VOC) which are precursors to ambient ozone, the rule also aids in the reduction of tropospheric ozone. 

See the regulations below for more details.

Rule History

03/27/2014 - Pesticide Active Ingredient Production Final Rule

01/09/2012 - Pesticide Active Ingredient Proposed Rule

09/20/2002 - Pesticide Active Ingredient Production Final Rule; Amendments

06/03/2002 - Pesticide Active Ingredient Production Final Rule; Amendment

05/01/2002 - Pesticide Active Ingredient Production Withdrawal of Direct Final Rule

04/10/2002 - Pesticide Active Ingredient Production Proposed Rule; Direct Final Rule

03/22/2002 - Pesticide Active Ingredient Production Proposed Rule; Amendments 

11/21/2001 - Pesticide Active Ingredient Production Direct Final Rule; Amendment

06/23/1999 - Pesticide Active Ingredient Production Final Rule

12/17/1997 - Pesticide Active Ingredient Extension of Public Comment Period

11/10/1997 - Pesticide Active Ingredient Proposed Rule

Additional Resources

Summary of Public Comments and Responses document for Final Hazardous Air Pollutant (HAP) Standards for Pesticide Active Ingredient Production Industry

Fact Sheets for Final and Proposed Rule

Overview of the Pesticide Active Ingredient MACT Standard

Stationary Sources of Air Pollution

  • Regulations
    • Industry Sector Groups
    • National Emission Standards for Hazardous Air Pollutants (NESHAP)
      • Area Source Standards
      • Risk and Technology Review Status
    • New Source Performance Standards
    • Good Neighbor Plan for the 2015 Ozone National Ambient Air Quality Standards
  • Small Business Assistance Program
Contact Us About Stationary Sources of Air Pollution
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Last updated on March 21, 2025
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