40 C.F.R. § 425.25

Current through September 30, 2024
Section 425.25 - Pretreatment standards for existing sources (PSES)

Except as provided in § 425.04 and 40 CFR 403.7 and 403.13 , any existing source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403, and achieve the following pretreatment standards:

Pollutant or pollutant propertyPSES
Maximum for any 1 day Maximum for monthly average
Milligrams per liter (mg/l)
Sulfide24
Total Chromium128
pH(1)(1)

1 Not less than 7.0.

40 C.F.R. §425.25

47 FR 52870, Nov. 23, 1982, as amended at 61 FR 35685, July 8, 1996