{"data":{"id":"us/40-cfr-461.72","jurisdiction":"us","citation":"40 CFR 461.72","heading":"Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).","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 available technology economically achievable:\n(1) Subpart G—Wet Amalgamated Powder Anodes.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of Zinc\nEnglish units—pounds per 1,000,000 pounds of Zinc\nChromium 0.24 0.099\nMercury 0.14 0.055\nSilver 0.23 0.093\nZinc 0.80 0.34\nManganese 0.37 0.16\n(2) Subpart G—Gelled Amalgam Anodes.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of Zinc\nEnglish units—pounds per 1,000,000 pounds of Zinc\nChromium 0.030 0.012\nMercury 0.017 0.007\nSilver 0.028 0.012\nZinc 0.099 0.042\nManganese 0.046 0.020\n(3) Subpart G—Zinc Oxide Formed Anodes.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of Zinc\nEnglish units—pounds per 1,000,000 pounds of Zinc\nChromium 9.53 3.90\nMercury 5.42 2.17\nSilver 8.89 3.68\nZinc 31.64 13.22\nManganese 14.74 6.28\n(4) Subpart G—Electrodeposited Anodes.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of zinc deposited\nEnglish units—pounds per 1,000,000 pounds of zinc deposited\nChromium 94.47 38.65\nMercury 53.68 21.47\nSilver 88.03 36.50\nZinc 313.46 130.97\nManganese 146.00 62.26\n(5) Subpart G—Silver Powder Formed Cathodes.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of silver applied\nEnglish units—pounds per 1,000,000 pounds of silver applied\nChromium 13.07 5.35\nMercury 7.43 2.97\nSilver 12.18 5.05\nZinc 43.36 18.12\nManganese 20.20 8.61\n(6) Subpart G—Silver Oxide Powder Formed Cathodes.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of silver applied\nEnglish units—pounds per 1,000,000 pounds of silver applied\nChromium 8.73 3.57\nMercury 4.96 1.99\nSilver 8.14 3.37\nZinc 28.98 12.11\nManganese 13.50 5.76\n(7) Subpart G—Silver Peroxide Cathodes.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of silver applied\nEnglish units—pounds per 1,000,000 pounds of silver applied\nChromium 2.09 0.87\nMercury 1.19 0.48\nSilver 1.95 0.81\nZinc 6.95 2.90\nManganese 3.24 1.38\n(8) Subpart G—Nickel Impregnated Cathodes.\nBAT 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\nChromium 88.0 36.0\nMercury 50.0 20.0\nNickel 384.0 254.0\nSilver 82.0 34.0\nZinc 292.0 122.0\nManganese 136.0 58.0\n(9) Subpart G—Miscellaneous Wastewater Streams.\nBAT 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\nChromium 0.57 0.23\nCyanide 0.38 0.16\nMercury 0.32 0.13\nNickel 2.48 1.64\nSilver 0.53 0.22\nZinc 1.88 0.79\nManganese 0.88 0.37\n(10) Subpart G—Silver Etch.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of silver processed\nEnglish units—pounds per 1,000,000 pounds of silver processed\nChromium 3.27 1.34\nMercury 1.86 0.74\nSilver 3.05 1.26\nZinc 10.86 4.54\nManganese 5.06 2.16\n(11) Subpart G—Silver Peroxide Production.\nBAT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nMetric units—mg/kg of silver peroxide produced\nEnglish units—pounds per 1,000,000 pounds of silver peroxide produced\nChromium 3.48 1.42\nMercury 1.98 0.79\nSilver 3.24 1.34\nZinc 11.55 4.83\nManganese 5.38 2.29\n(12) Subpart G—Silver Powder Production.\nBAT 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\nChromium 1.41 0.58\nMercury 0.80 0.32\nSilver 1.32 0.55\nZinc 4.69 1.96\nManganese 2.18 0.93\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 G—Zinc 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":"116d289377491cc887319de0af2bdc6da01cbbf0ee8160c88104363c714820f2","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-461.71","next":"us/40-cfr-461.73"},"notice":"GroundRules: Original legal text. Not legal advice."}