40 CFR § 422.40 - Applicability; description of the defluorinated phosphate rock subcategory.
---identifier: "/us/cfr/t40/s422.40"source: "ecfr"legal_status: "authoritative_unofficial"title: "40 CFR § 422.40 - Applicability; description of the defluorinated phosphate rock subcategory."title_number: 40title_name: "Protection of Environment"section_number: "422.40"section_name: "Applicability; description of the defluorinated phosphate rock subcategory."chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"subchapter_number: "N"subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"part_number: "422"part_name: "PHOSPHATE MANUFACTURING POINT SOURCE CATEGORY"positive_law: falsecurrency: "2026-04-05"last_updated: "2026-04-05"format_version: "1.1.0"generator: "[email protected]"authority: "Secs. 301, 304 (b) and (c), 306 (b) and (c), and 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c), 1317(c); 86 Stat. 816 Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217."regulatory_source: "39 FR 6582, Feb. 20, 1974, unless otherwise noted."cfr_part: "422"---
Identifier
/us/cfr/t40/s422.40
Currency
2026-04-05
Positive Law
No
Updated
2026-04-05
Chapter
Environmental Protection Agency
Authority
Secs. 301, 304 (b) and (c), 306 (b) and (c), and 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c), 1317(c); 86 Stat. 816 Pub. L.... Secs. 301, 304 (b) and (c), 306 (b) and (c), and 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c), 1317(c); 86 Stat. 816 Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.
# 422.40 Applicability; description of the defluorinated phosphate rock subcategory.The provisions of this subpart are applicable to discharges resulting from the defluorination of phosphate rock by application of high temperature treatment along with wet process phosphoric acid, silica and other reagents.