{"data":{"id":"us/40-cfr-420.25","jurisdiction":"us","citation":"40 CFR 420.25","heading":"Pretreatment standards for existing sources (PSES).","body":"Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for existing sources (PSES):\n(a) Sintering operations with wet air pollution control system. The following table presents PSES for sintering operations with wet air pollution control systems:\nSubpart B—Pretreatment Standards for Existing Sources (PSES)\nRegulated parameter Maximum daily 1 Maximum monthly avg. 1\nAmmonia-N 2 3 0.0150 0.00501\nCyanide 2 0.00300 0.00150\nPhenols (4AAP) 2 0.000100 0.0000501\nLead 0.000451 0.000150\nZinc 0.000676 0.000225\n2,3,7,8-TCDF \u003cML\n1 Pounds per thousand lb of product.\n2 The pretreatment standards for these parameters apply only when sintering wastewater is co-treated with ironmaking wastewater.\n3 The pretreatment standards for ammonia are not applicable to sources that discharge to a POTW with nitrification capability (defined at § 420.02(s)).\n(b) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to POTWs.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 420—IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY","Subpart B—Sintering 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":"8bd138303ac17055be1197d69b5c958a67d239bd5442b7ecd414755870438fa9","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-420.24","next":"us/40-cfr-420.26"},"notice":"GroundRules: Original legal text. Not legal advice."}