US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 439 — PHARMACEUTICAL MANUFACTURING POINT SOURCE CATEGORYSubpart E — Research439.5040 C.F.R. § 439.50Applicability.Last amended: 2016Year: 2026Length: 18 wordsOfficial source Cite as 40 C.F.R. § 439.50 (2026)This subpart applies to discharges of process wastewater resulting from pharmaceutical research. [63 FR 50436, Sept. 21, 1998]Next40 C.F.R. § 439.51