40 CFR § 424.23 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
---identifier: "/us/cfr/t40/s424.23"source: "ecfr"legal_status: "authoritative_unofficial"title: "40 CFR § 424.23 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable."title_number: 40title_name: "Protection of Environment"section_number: "424.23"section_name: "Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable."chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"subchapter_number: "N"subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"part_number: "424"part_name: "FERROALLOY MANUFACTURING POINT SOURCE CATEGORY"positive_law: falsecurrency: "2026-03-24"last_updated: "2026-03-24"format_version: "1.1.0"generator: "[email protected]"authority: "Secs. 301, 304(b) and (c), 306(b) and (c), 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 6809, Feb. 22, 1974, unless otherwise noted."cfr_part: "424"---
Identifier
/us/cfr/t40/s424.23
Currency
2026-03-24
Positive Law
No
Updated
2026-03-24
Chapter
Environmental Protection Agency
Authority
Secs. 301, 304(b) and (c), 306(b) and (c), 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... Secs. 301, 304(b) and (c), 306(b) and (c), 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.
# 424.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable:| | | || --- | --- | --- || | Metric units (kg/Mwh) | || Chromium total | 0.001 | 0.0005 || Chromium VI | .0001 | .00005 || Manganese total | .011 | .005 || Cyanide total | .0005 | .0003 || Phenols | .0004 | .0002 || | English units (lb/Mwh) | || Chromium total | .002 | .0012 || Chromium VI | .0002 | .0001 || Manganese total | .023 | .012 || Cyanide total | .001 | .0006 || Phenols | .0009 | .0005 |*Provided, however,* That for nonelectric furnace smelting processes, the units of effluent limitations set forth in this section shall be read as “kg/kkg of product” rather than “kg/Mwh,” and the limitations (except for pH) shall be 3.3 times those listed in the table in this section (or, for English units, “lb/ton of product” rather than “lb/Mwh,” and the limitations (except for pH) shall be three times those listed in the table).[44 FR 50744, Aug. 29, 1979]