{"data":{"id":"us/40-cfr-461.73","jurisdiction":"us","citation":"40 CFR 461.73","heading":"New source performance standards. (NSPS).","body":"(a) The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below:\n(1) Subpart G—Zinc Oxide Formed Anodes—NSPS.\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 4.55 1.97\nMercury 2.82 1.19\nSilver 4.55 1.97\nZinc 0.87 0.39\nManganese 6.50 4.98\nOil and grease 216.7 216.7\nTSS 325.0 260.0\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(2) Subpart G—Electrodeposited Anodes—NSPS.\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 45.09 19.54\nMercury 27.91 11.81\nSilver 45.09 19.54\nZinc 8.59 3.86\nManganese 64.41 49.38\nOil and grease 2,147.00 2,147.00\nTSS 3,220.50 2,576.40\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(3) Subpart G—Silver Powder Formed Cathodes—NSPS.\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 6.24 2.70\nMercury 3.86 1.63\nSilver 6.24 2.70\nZinc 1.19 0.53\nManganese 8.91 6.83\nOil and grease 297.00 297.00\nTSS 445.5 356.40\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(4) Subpart G—Silver Oxide Powder Formed Cathodes—NSPS.\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 4.17 1.81\nMercury 2.58 1.09\nSilver 4.17 1.81\nZinc 0.79 0.36\nManganese 5.96 4.57\nOil and grease 198.5 198.5\nTSS 297.8 238.2\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(5) Subpart G—Silver Peroxide Cathodes—NSPS.\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 1.00 0.43\nMercury 0.62 0.26\nSilver 1.00 0.43\nZinc 0.19 0.09\nManganese 1.43 1.09\nOil and grease 47.6 47.6\nTSS 71.4 57.1\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(6) Subpart G—Nickel Impregnated Cathodes—NSPS.\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 42.0 18.2\nMercury 26.0 11.0\nNickel 42.0 18.2\nSilver 42.0 18.2\nZinc 8.0 3.6\nManganese 60.0 46.0\nOil and grease 2,000.0 2,000.0\nTSS 3,000.0 2,400.00\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(7) Subpart G—Miscellaneous Wastewater Streams—NSPS.\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 0.27 0.12\nCyanide 0.039 0.016\nMercury 0.17 0.07\nNickel 0.27 0.12\nSilver 0.27 0.12\nZinc 0.05 0.02\nManganese 0.39 0.30\nOil and grease 12.90 12.90\nTSS 19.35 15.48\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(8) Subpart G—Silver Etch—NSPS.\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 1.56 0.68\nMercury 0.97 0.41\nSilver 1.56 0.68\nZinc 0.30 0.13\nManganese 2.23 1.71\nOil and grease 74.40 74.40\nTSS 111.60 89.28\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(9) Subpart G—Silver Peroxide Production—NSPS.\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 1.66 0.72\nMercury 1.03 0.44\nSilver 1.66 0.72\nZinc 0.32 0.14\nManganese 2.37 1.82\nOil and grease 79.10 79.10\nTSS 118.65 94.92\npH (1) (1)\n1 Within the limits of 7.5-10.0 at all times.\n(10) Subpart G—Silver Powder Production—NSPS.\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 0.67 0.29\nMercury 0.42 0.18\nSilver 0.67 0.29\nZinc 0.13 0.06\nManganese 0.96 0.74\nOil and grease 32.10 32.10\nTSS 48.15 38.52\npH (1) (1)\n1 Within the limits of 7.5-10.0 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 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":"688488aed206dc0079174bfb2466fe25265846af63eb6fb5ac8a374f7299da64","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-461.72","next":"us/40-cfr-461.74"},"notice":"GroundRules: Original legal text. Not legal advice."}