What are Categorical Pretreatment Standards?

These are technology-based limitations on pollutant discharges to POTWs promulgated by EPA in accordance with Section 307 of the Clean Water Act that apply to specified process wastewaters of particular industrial categories [see 40 CFR 403.6 and 40 CFR Parts 405- 471]. Go to EPA Water Data and Tools and NPDES Regulations for more information.

Source: USEPA