{"data":{"id":"us/40-cfr-437.31","jurisdiction":"us","citation":"40 CFR 437.31","heading":"Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).","body":"Except as provided in 40 CFR 125.30 through 125.32 or § 437.30(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:\nBPT Limitations\nRegulated parameter Maximum daily 1 Maximum monthly avg. 1\nConventional Parameters\nBOD5 163 53.0\npH (2) (2)\nTSS 216 61.3\nMetal Parameters\nCopper 0.865 0.757\nZinc 0.497 0.420\nOrganic Parameters\nAcetone 30.2 7.97\nAcetophenone 0.114 0.0562\n2-Butanone 4.81 1.85\no-Cresol 1.92 0.561\np-Cresol 0.698 0.205\nPhenol 3.65 1.08\nPyridine 0.370 0.182\n2,4,6-Trichlorophenol 0.155 0.106\n1 mg/L (ppm).\n2 Within the range 6 to 9.","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 C—Organics 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":"46ee3303704b6b5e4cb81b1935ad2be22c5cc6f949db907f26c6445d4683af34","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-437.30","next":"us/40-cfr-437.32"},"notice":"GroundRules: Original legal text. Not legal advice."}