{"data":{"id":"us/40-cfr-420.35","jurisdiction":"us","citation":"40 CFR 420.35","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 which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.\n(a) Iron blast furnace.\nSubpart C\nPollutant or pollutant property Pretreatment standards for existing sources\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of products\nAmmonia-N 1 0.00876 0.00292\nCyanide 0.00175 0.000876\nPhenols (4AAP) 0.0000584 0.0000292\nLead 0.000263 0.0000876\nZinc 0.000394 0.000131\n1 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) [Reserved]\n(c) Existing indirect dischargers.\nSubpart C\nPollutant or pollutant property Pretreatment standards for existing sources\nMaximum for any 1 day Average of daily values for 30 consecutive days\nKg/kkg (pounds per 1,000 lb) of product\nAmmonia-N 0.0350 0.0175\nCyanide 0.00175 0.000876\nPhenols (4AAP) 0.000175 0.0000584\nLead 0.000263 0.0000876\nZinc 0.000394 0.000131","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 C—Ironmaking 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":"f0db4e422441019557bde6ea217c4c8d2dfbeb6a98bc8e64376766e3cf382c46","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-420.34","next":"us/40-cfr-420.36"},"notice":"GroundRules: Original legal text. Not legal advice."}