The U.S. Environmental Protection Agency (EPA) finalized an amendment to the 2015 National Emissions Standards for Hazardous Air Pollutants (NESHAP) for Phosphoric Acid Manufacturing. On September 6, 2016, PCS Phosphates (now under Nutrien) petitioned EPA to review the 2015 NESHAP based on newly available data. Following analysis of the petitioner’s data, EPA is revising the mercury maximum achievable control technology (MACT) floor for existing calciners in the Phosphoric Acid Manufacturing NESHAP.  The final amendment fulfills EPA’s statutory requirements under the CAA, while maintaining the intent of the emission and operational standards of the 2015 NESHAP.

For more information visit the Phosphoric Acid Manufacturing NESHAP rule page

• Final Rule: National Emission Standards for Hazardous Air Pollutants for Phosphoric Acid Manufacturing (PDF)(19 pp, 307 K)
  Pre-publication version
• Fact Sheet: Final Amendment to Air Toxics Standards for Phosphoric Acid Manufacturing (PDF)(2 pp, 145 K)