US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 439 — PHARMACEUTICAL MANUFACTURING POINT SOURCE CATEGORYSubpart D — Mixing/Compounding and Formulation439.4040 C.F.R. § 439.40Applicability.Last amended: 2016Year: 2026Length: 27 wordsOfficial source Cite as 40 C.F.R. § 439.40 (2026)This subpart applies to discharges of process wastewater resulting from the manufacture of pharmaceutical products by mixing, compounding and formulating operations. [63 FR 50435, Sept. 21, 1998]Next40 C.F.R. § 439.41