Pretreatment standards for existing sources (PSES).

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§ 444.16 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any source that introduces wastewater pollutants into a POTW must comply with part 403 and achieve the following pretreatment standards:

Expand Table

Pretreatment Standards1

Regulated
parameter
Maximum daily Maximum monthly avg.
Arsenic 84 72
Cadmium 71 26
Chromium 25 14
Copper 23 14
Lead 57 32
Mercury 2.3 1.3
Silver 13 8
Titanium 60 22
Zinc 82 54


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