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40 CFR § 424.13 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

---
identifier: "/us/cfr/t40/s424.13"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 424.13 - 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: "424.13"
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: false
currency: "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"
---

# 424.13 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 | 0.0008 | 0.0004 |
| Chromium VI | .00008 | .00004 |
| Manganese total | .008 | .0039 |
|  | English units (lb/Mwh) |  |
| Chromium total | .0017 | .0009 |
| Chromium VI | .0002 | .0001 |
| Manganese total | .017 | .0086 |

[44 FR 50744, Aug. 29, 1979]