{"data":{"id":"us/40-cfr-421.96","jurisdiction":"us","citation":"40 CFR 421.96","heading":"Pretreatment standards for new sources.","body":"Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in metallurgical acid plant blowdown introduced into a POTW shall not exceed the following values:\nSubpart I—Metallurgical Acid Plant—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of 100 pct sulfuric acid capacity\nArsenic 3.550 1.584\nCadmium 0.511 0.204\nCopper 3.269 1.558\nLead 0.715 0.332\nZinc 2.605 1.073\nFluoride 1 89.390 50.820\nMolybdenum 1 [Reserved] [Reserved].\n1 For Molybdenum acid plants only.","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 I—Metallurgical Acid Plants 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":"9ced1518e1175ddca75ac01e6b7c33c86a9e3bf1893642eba76660d2c282a74b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.95","next":"us/40-cfr-421.97"},"notice":"GroundRules: Original legal text. Not legal advice."}