U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 03, 2022

§ 429.85 - Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and meet the following pretreatment standards for existing sources (PSES):

Subpart G

[PSES Effluent Limitations]

Pollutant or pollutant property Maximum for any 1 day (mg/l)
Oil and grease100
Copper5
Chromium4
Arsenic4
In cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as guidance.

[Grams per cubic meter of production]

Pollutant or pollutant property Maximum for any 1 day
Oil and grease20.5
Copper.62
Chromium.41
Arsenic.41