Regulations last checked for updates: Dec 17, 2025

Title 40 - Protection of Environment last revised: Nov 17, 2028
§ 439.3 - General pretreatment standards.

Any source subject to this part that introduces process wastewater pollutants into a publicly owned treatment works (POTW) must comply with 40 CFR part 403.

[63 FR 50425, Sept. 21, 1998]
source: 48 FR 49821, Oct. 27, 1983, unless otherwise noted.
cite as: 40 CFR 439.3