{"data":{"id":"us/40-cfr-461.11","jurisdiction":"us","citation":"40 CFR 461.11","heading":"Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).","body":"(a) Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:\n(1) Subpart A—Pasted and Pressed Powder Anodes.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of cadmium\nEnglish units—pounds per 1,000,000 pounds of cadmium\nCadmium 0.92 0.41\nNickel 5.18 3.43\nZinc 3.94 1.65\nCobalt 0.57 0.24\nOil and grease 54.00 32.40\nTSS 111.00 52.65\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(2) Subpart A—Electrodeposited Anodes.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of cadmium\nEnglish units—pounds per 1,000,000 pounds of cadmium\nCadmium 237.0 104.6\nNickel 1,338.2 885.2\nZinc 1,017.6 425.2\nCobalt 146.4 62.7\nOil and grease 13,940.0 8,364.0\nTSS 28,577.0 13,592.0\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(3) Subpart A—Impregnated Anodes.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of cadmium\nEnglish units—pounds per 1,000,000 pounds of cadmium\nCadmium 339.3 149.7\nNickel 1,916.2 1,267.5\nZinc 1,457.1 608.8\nCobalt 209.6 89.8\nOil and grease 19,960.0 11,976.0\nTSS 40,918.0 19,461.0\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(4) Subpart A—Nickel Electrodeposited Cathodes.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of nickel applied\nEnglish units—pounds per 1,000,000 pounds of nickel applied\nCadmium 193.5 85.4\nNickel 1,092.5 722.6\nZinc 830.7 347.1\nCobalt 119.5 51.2\nOil and grease 11,380.0 6,828.0\nTSS 23,329.0 11,095.5\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(5) Subpart A—Nickel Impregnated Cathodes.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of nickel applied\nEnglish units—pounds per 1,000,000 pounds of nickel applied\nCadmium 557.6 246.0\nNickel 3,148.8 2,082.8\nZinc 2,394.4 1,000.4\nCobalt 344.4 147.6\nOil and grease 32,800.0 19,680.0\nTSS 67,240.0 31,980.0\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(6) Subpart A—Miscellaneous Wastewater Streams.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of cells produced\nEnglish units—pounds per 1,000,000 pounds of cells produced\nCadmium 6.29 2.77\nNickel 35.54 23.50\nZinc 27.02 11.29\nCobalt 3.89 1.66\nOil and grease 370.20 222.12\nTSS 758.91 360.94\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(7) Subpart A—Cadmium Powder Production.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of cadmium powder produced\nEnglish units—pounds per 1,000,000 pounds of cadmium powder produced\nCadmium 22.34 9.86\nNickel 126.14 83.44\nZinc 95.92 40.08\nCobalt 13.80 5.91\nOil and grease 1,314.00 788.40\nTSS 2,693.00 1,281.20\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(8) Subpart A—Silver Powder Production.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of silver powder produced\nEnglish units—pounds per 1,000,000 pounds of silver powder produced\nCadmium 7.21 3.18\nNickel 40.70 26.92\nSilver 8.69 3.61\nZinc 30.95 12.93\nCobalt 4.45 1.91\nOil and grease 424.00 254.40\nTSS 869.20 413.40\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(9) Subpart A—Cadmium Hydroxide Production.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of cadmium used\nEnglish units—pounds per 1,000,000 pounds of cadmium used\nCadmium 0.31 0.14\nNickel 1.73 1.14\nZinc 1.31 0.55\nCobalt 0.19 0.08\nOil and grease 18.00 10.80\nTSS 36.90 17.60\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(10) Subpart A—Nickel Hydroxide Production.\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of nickel used\nEnglish units—pounds per 1,000,000 pounds of nickel used\nCadmium 37.4 16.5\nNickel 211.2 139.7\nZinc 160.6 67.1\nCobalt 23.1 9.9\nOil and grease 2,200.0 1,320.0\nTSS 4,510.0 2,145.0\npH (1) (1)\n1 Within the range of 7.5 to 10.0 at all times.\n(b) There shall be no discharge allowance for process wastewater pollutants from any battery manufacturing operation other than those battery manufacturing operations listed above.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 461—BATTERY MANUFACTURING POINT SOURCE CATEGORY","Subpart A—Cadmium 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":"8dda5424c518da57617d041452a401162e28659de86925d0ed19519824302232","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-461.10","next":"us/40-cfr-461.12"},"notice":"GroundRules: Original legal text. Not legal advice."}