{"data":{"id":"us/40-cfr-421.194","jurisdiction":"us","citation":"40 CFR 421.194","heading":"Standards of performance for new sources.","body":"Any new source subject to this subpart shall achieve the following new source performance standards:\n(a) Displacement Supernatant.\nNSPS for the Secondary Indium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of indium metal produced\nCadmium 2.105 0.929\nLead 2.600 1.238\nZinc 9.037 3.776\nIndium 2.724 1.114\nTotal suspended solids 253.800 120.700\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) Spent Electrolyte.\nNSPS for the Secondary Indium Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of cathode indium produced\nCadmium 12.170 5.370\nLead 15.040 7.160\nZinc 52.270 21.840\nIndium 15.750 6.444\nTotal suspended solids 1,468.000 698.100\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY","Subpart Q—Secondary Indium Subcategory"],"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":"b43656af416cdcb97931640a61da665e75ff8235d4c197e5a9b7e9af975fa5fd","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.192-421.193","next":"us/40-cfr-421.195"},"notice":"GroundRules: Original legal text. Not legal advice."}