40 CFR § 421.233 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
---identifier: "/us/cfr/t40/s421.233"source: "ecfr"legal_status: "authoritative_unofficial"title: "40 CFR § 421.233 - 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: "421.233"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: "421"part_name: "NONFERROUS METALS 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), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4."regulatory_source: "49 FR 8790, Mar. 8, 1984, unless otherwise noted."cfr_part: "421"---
Identifier
/us/cfr/t40/s421.233
Currency
2026-03-24
Positive Law
No
Updated
2026-03-24
Chapter
Environmental Protection Agency
Authority
Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water A... Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4.
# 421.233 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:(a) Raw material dust control.BAT Limitations for the Primary Nickel and Cobalt Subcategory| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average || --- | --- | --- || | mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material | || Copper | 0.099 | 0.047 || Nickel | 0.042 | 0.028 || Ammonia (as N) | 10.260 | 4.512 || Cobalt | 0.011 | 0.005 |(b) Nickel wash water.BAT Limitations for the Primary Nickel and Cobalt Subcategory| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average || --- | --- | --- || | mg/kg (pounds per million pounds) of nickel powder washed | || Copper | 0.043 | 0.021 || Nickel | 0.019 | 0.013 || Ammonia (as N) | 4.515 | 1.985 || Cobalt | 0.005 | 0.002 |(c) Nickel reduction decant.BAT Limitations for the Primary Nickel and Cobalt Subcategory| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average || --- | --- | --- || | mg/kg (pounds per million pounds) of nickel produced | || Copper | 16.250 | 7.744 || Nickel | 6.982 | 4.697 || Ammonia (as N) | 1,692.000 | 743.900 || Cobalt | 1.777 | 0.889 |(d) Cobalt reduction decant.BAT Limitations for the Primary Nickel and Cobalt Subcategory| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average || --- | --- | --- || | mg/kg (pounds per million pounds) of cobalt produced | || Copper | 27.390 | 13.050 || Nickel | 11.770 | 7.917 || Ammonia (as N) | 2,852.000 | 1,254.000 || Cobalt | 2.996 | 1.498 |[50 FR 38359, Sept. 20, 1985; 50 FR 41144, Oct. 9, 1985]