40 CFR § 418.10 - Applicability; description of the phosphate subcategory.
---
identifier: "/us/cfr/t40/s418.10"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 418.10 - Applicability; description of the phosphate subcategory."
title_number: 40
title_name: "Protection of Environment"
section_number: "418.10"
section_name: "Applicability; description of the phosphate subcategory."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "418"
part_name: "FERTILIZER MANUFACTURING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1251"
regulatory_source: "39 FR 12836, April 8, 1974, unless otherwise noted."
cfr_part: "418"
---
# 418.10 Applicability; description of the phosphate subcategory.
The provisions of this subpart are applicable to discharges resulting from the manufacture of sulfuric acid by sulfur burning, wet-process phosphoric acid, normal superphosphate, triple superphosphate and ammonium phosphate, except that the provisions of §§ 418.12, 418.13, and 418.17 shall not apply to wet-process phosphoric acid processes that were under construction either on or before April 8, 1974, at plants located in the State of Louisiana.
[52 FR 28432, July 29, 1987]