U.S. Code of Federal Regulations
Regulations most recently checked for updates: Mar 20, 2023
(a) Except as provided in § 425.04 and 40 CFR 403.7 and § 403.13, any existing sources 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 property||PSES limitations|
|Maximum for any 1 day||Maximum for monthly average|
|Milligrams per liter (mg/l)|
|pH||( 1)||( 1)|
1 Not less than 7.0.
(b) Any existing source subject to this subpart which processes less than 350 hides/day shall comply with § 425.35(a), except that the Total Chromium limitations contained in § 425.35(a) do not apply.