Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Stationary Sources of Air Pollution

Phosphate Fertilizer Industry: New Source Performance Standards - 40 CFR 60 Subparts T, U, V, W & X

Phosphate Fertilizer Industry: New Source Performance Standards - 40 CFR 60 Subparts T, U, V, W & X
Basic Information
Legal Authorities
  • 42 U.S.C. §7411
Federal Register Citations
  • 80 FR 50386
  • 79 FR 66512
  • 48 FR 7128
  • 45 FR 77075
  • 40 FR 33152
  • 39 FR 37602
Code of Federal Regulations Citations
  • 40 CFR Part 60 Subpart T
  • 40 CFR Part 60 Subpart U
  • 40 CFR Part 60 Subpart V
  • 40 CFR Part 60 Subpart W
  • 40 CFR Part 60 Subpart X
Docket Numbers
  • EPA-HQ-OAR-2006-0439
  • EPA-HQ-OAR-2012-0522

On this page:

  • Rule Summary
  • Rule History
  • Additional Resources
  • Compliance

Rule Summary

This action finalizes an 8-year review of the current new source performance standards (NSPS) for five phosphate fertilizer industry source categories- 40 CFR Subparts T, U, V, W, & X. Based on the 8-year review of the current NSPS for these source categories, the EPA determined that no revisions to the numeric emission limits in those rules are warranted.

Subpart T covers Wet-Process Phosphoric Acid (WPPA) plants, which are defined in the standards as any facility manufacturing phosphoric acid by reacting phosphate rock and acid. These standards limit emission of total fluorides from WPPA plants to 10.0g/Mg of equivalent P2O5 feed (0.020 lb/ton).

Subpart U cover Superphosphoric Acid (SPA) plants, which are defined in the standard as a facility that concentrates wet process phosphoric acid to 66 percent or greater P2O5 content by weight for eventual consumption as a fertilizer. These standards limit emissions of total fluorides from SPA plants to 5.0g/megagram (Mg) of equivalent P2O5 feed (0.010 lb/ton).

Subpart V covers Diammonium Phosphate (DAP) plants, which are defined in the standard as any plant manufacturing granular diammonium phosphate by reacting phosphoric acid with ammonia. These standards limit emission of total fluorides from DAP plants to 30 g/megagram (Mg) of equivalent P2O5 feed (0.060 lb/ton).

Subpart W covers Triple Superphosphate (TSP) plants, which are defined in the standards as any facility manufacturing triple superphosphate by reacting phosphate rock with phosphoric acid. These standards limit emissions of total fluorides from TSP plants to 100 g/megagram (Mg) of equivalent P2O5 feed (0.20 lb/ton).

Subpart X cover Granular Triple Superphosphate (GTSP) storage facilities, which are defined in the standards as any facility curing or storing fresh granular triple superphosphate. These standards limit emissions of total fluorides from GTSP storage facilities to 0.25g/hr/megagram (Mg) of equivalent P2O5 stored (5.0 × 10)^4 lb/hr/ton of equivalent P2O5 stored).

Rule History

08/19/2015 – Final Rule (80 FR 50386)

11/07/2014 – Proposed Rule (79 FR 66512)

02/17/1983 - Final rule (pdf) (15.15 MB)

11/21/1980 - Review of Standards (pdf) (35.98 MB)

08/06/1975 - Final rule 40 FR 33152

10/22/1974 - Proposed rule (pdf) (13.7 MB)

Additional Resources

Review of New Source Performance Standards for Phosphate Fertilizer Industry

Review of New Source Performance Standards for Phosphate Fertilizer Industry - Revised

Related Rules

Phosphate Rock Plants: New Source Performance Standards

Phosphate Fertilizer Production Plants and Phosphoric Acid Manufacturing Plants: National Emission Standards for Hazardous Air Pollutants

Compliance

Applicability Determination Index (ADI).  The ADI is maintained by EPA's Office of Enforcement and Compliance Assurance (OECA) and provides a data base of memoranda dealing with applicability issues.  The database is searchable by Subpart.

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
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 28, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.