§ 444.16 - 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:

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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