An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Phosphate Fertilizer Production Plants and Phosphoric Acid Manufacturing Plants: National Emission Standards for Hazardous Air Pollutants (NESHAP) - 40 CFR 63 Subparts AA & BB

Rule Summary

On July 21, 2015, the Environmental Protection Agency (EPA) issued final amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Phosphoric Acid Manufacturing and Phosphate Fertilizer Production, and to the Standards of Performance (NSPS) for Phosphate Processing. The phosphoric acid manufacturing and phosphate fertilizer production standards were promulgated in 1999 and currently 13 facilities are subject to at least one of the rules. Ten of the 13 facilities are considered to be in both source categories.

Subpart AA covers Wet-Process Phosphoric Acid (WPAA) lines, Superphosphoric Acid (SPA) process, SPA submerged line with a submerged combustion, phosphate rock dryer, and phosphate rock calciners. Emissions of total fluorides, total particulate and mercury are regulated for this source category.

Subpart BB covers phosphate fertilizer process line, Granular Triple Superphosphate (GTSP) process line and GTSP storage buildings. Emissions of total fluorides are regulated for this source category.

Rule History

9/13/2017 - Final Reconsideration

11/28/2016 - Proposed Reconsideration.

08/19/2015 - Final rule.

11/07/2014 - Proposed Rule.

06/13/2002 - Final rule, amendments.

06/12/2002 - Final rule, amendments.

12/17/2001 - Direct Final Rule; Amendments & Proposed rule; amendments.

06/07/1999 - Final Rule.

12/27/1996 - Proposed Rule.

Additional Resources

9/13/2017 - Fact Sheet for Reconsideration

7/21/2015 - Fact Sheet for Risk and Technology Review Final Rule

7/21/2015 - Residual Risk Assessment in Support of the July 2015 Risk and Technology Review Final Rule

View the supporting documents in the docket folder for the rule to find additional related documents.

Related Rules

Phosphate Rock Plants: New Source Performance Standards

Phosphate Fertilizer Industry: New Source Performance Standards