40 CFR § 421.73 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
---
identifier: "/us/cfr/t40/s421.73"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 421.73 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable."
title_number: 40
title_name: "Protection of Environment"
section_number: "421.73"
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: false
currency: "2026-04-05"
last_updated: "2026-04-05"
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"
---
# 421.73 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) Subpart G—Sinter Plant Materials Handling Wet Air Pollution Control.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of sinter production | |
| Lead | 100.800 | 46.800 |
| Zinc | 367.200 | 151.200 |
(b) Subpart G—Blast Furnace Wet Air Pollution Control.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of blast furnace lead bullion produced | |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
(c) Subpart G—Blast Furnace Slag Granulation.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of blast furnace lead bullion produced | |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
(d) Subpart G—Dross Reverberatory Slag Granulation.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of slag, speiss, or matte granulated | |
| Lead | 1,612.000 | 748.400 |
| Zinc | 5,872.000 | 2,418.000 |
(e) Subpart G—Dross Reverberatory Furnace Wet Air Pollution Control.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of dross reverberatory furnace production | |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
(f) Subpart G—Zinc Fuming Wet Air Pollution Control.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of blast furnance lead bullion produced | |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
(g) Subpart G—Hard Lead Refining Slag Granulation.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of hard lead produced | |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
(h) Subpart G—Hard Lead Refining Wet Air Pollution Control.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of hard lead produced | |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
(i) Subpart G—Facility Washdown.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of lead bullion produced | |
| Lead | .000 | .000 |
| Zinc | .000 | .000 |
(j) Subpart G—Employee Handwash.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of lead bullion produced | |
| Lead | .924 | .429 |
| Zinc | 3.366 | 1.386 |
(k) Subpart G—Respirator Wash.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of lead bullion produced | |
| Lead | 1.484 | .689 |
| Zinc | 5.406 | 2.226 |
(l) Subpart G—Laundering of Uniforms.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kkg (pounds per billion pounds) of lead bullion produce | |
| Lead | 4.340 | 2.015 |
| Zinc | 15.810 | 6.510 |