40 CFR 424.23 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

View all text of Subpart B [§ 424.20 - § 424.27]

§ 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:

Effluent characteristic	Effluent limitations
Effluent characteristic	Maximum for any 1 day	Average of daily values for 30 consecutive days shall not exceed—
	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]