{"data":{"id":"us/40-cfr-421.146","jurisdiction":"us","citation":"40 CFR 421.146","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 primary antimony process wastewater introduced into a POTW shall not exceed the following values:\n(a) Sodium Antimonate Autoclave Wastewater.\nPSNS for the Primary Antimony Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of antimony contained in sodium antimonate product\nAntimony 30.150 13.440\nArsenic 21.720 9.687\nMercury 2.344 0.937\n(b) Fouled Anolyte.\nPSNS for the Primary Antimony Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of antimony metal produced by electrowinning\nAntimony 30.150 13.440\nArsenic 21.720 9.687\nMercury 2.344 0.937\n(c) Cathode Antimony Washwater.\nPSNS for the Primary Antimony Subcategory\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/kg (pounds per million pounds) of antimony metal produced by electrowinning\nAntimony 60.310 26.870\nArsenic 43.430 19.370\nMercury 4.687 1.875","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 N—Primary Antimony 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":"d0f3a72ac52c12c7c597b4aed04ed58dec9799b1628ee62279f6bac9da1239fa","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-421.145","next":"us/40-cfr-421.147"},"notice":"GroundRules: Original legal text. Not legal advice."}