{"data":{"id":"us/40-cfr-437.25","jurisdiction":"us","citation":"40 CFR 437.25","heading":"Pretreatment standards for existing sources (PSES).","body":"Except as provided in 40 CFR 403.7, 403.13 or § 437.20(b), and no later than December 22, 2003, any existing source subject to this subpart must achieve the following pretreatment standards:\nPretreatment Standards (PSES)\nRegulated parameter Maximum daily 1 Maximum monthly avg. 1\nMetal Parameters\nChromium 0.947 0.487\nCobalt 56.4 18.8\nCopper 0.405 0.301\nLead 0.222 0.172\nTin 0.249 0.146\nZinc 6.95 4.46\nOrganic Parameters\nBis(2-ethylhexyl) phthalate 0.267 0.158\nCarbazole 0.392 0.233\nn-Decane 5.79 3.31\nFluoranthene 0.787 0.393\nn-Octadecane 1.22 0.925\n1 mg/L (ppm).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 437—THE CENTRALIZED WASTE TREATMENT POINT SOURCE CATEGORY","Subpart B—Oils Treatment and Recovery"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"cf7369099ef31bb97d5a742faeb0ba950bbb26304b411e61afbef2b825087c74","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-437.24","next":"us/40-cfr-437.26"},"notice":"GroundRules: Original legal text. Not legal advice."}