Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR 437.11: Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

Where this section sits in the code

Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
PART 437—THE CENTRALIZED WASTE TREATMENT POINT SOURCE CATEGORY
Subpart A—Metals Treatment and Recovery

(a) Except as provided in 40 CFR 125.30 through 125.32 or § 437.10(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:

BPT Limitations

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Conventional Parameters

O&G 205 50.2

pH (2) (2)

TSS 60.0 31.0

Metal Parameters

Antimony 0.249 0.206

Arsenic 0.162 0.104

Cadmium 0.474 0.0962

Chromium 15.5 3.07

Cobalt 0.192 0.124

Copper 4.14 1.06

Lead 1.32 0.283

Mercury 0.00234 0.000739

Nickel 3.95 1.45

Silver 0.120 0.0351

Tin 0.409 0.120

Titanium 0.0947 0.0618

Vanadium 0.218 0.0662

Zinc 2.87 0.641

1 mg/L (ppm).

2 Within the range 6 to 9.

(b) The following in-plant limitations apply to metal-bearing wastewater containing cyanide:

In-Plant Limitations

Regulated parameter Maximum daily 1 Maximum monthly avg. 1

Cyanide 500 178

1 mg/L (ppm).

Collected 2026-08-27T02:26:04Z. Source file · JSON

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