{"data":{"id":"us/40-cfr-425.35","jurisdiction":"us","citation":"40 CFR 425.35","heading":"Pretreatment standards for existing sources (PSES).","body":"(a) Except as provided in § 425.04 and 40 CFR 403.7 and § 403.13, any existing sources subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403, and achieve the following pretreatment standards:\nPollutant or pollutant property PSES limitations\nMaximum for any 1 day Maximum for monthly average\nMilligrams per liter (mg/l)\nSulfide 24 —\nTotal Chromium 12 8\npH (1) (1)\n1 Not less than 7.0.\n(b) Any existing source subject to this subpart which processes less than 350 hides/day shall comply with § 425.35(a), except that the Total Chromium limitations contained in § 425.35(a) do not apply.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 425—LEATHER TANNING AND FINISHING POINT SOURCE CATEGORY","Subpart C—Hair Save or Pulp, Non-Chrome Tan, Retan-Wet Finish 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":"814bb74fff11f19f06509228237a38f285e01497c97f9b48950cd99d7e81c0c1","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-425.34","next":"us/40-cfr-425.36"},"notice":"GroundRules: Original legal text. Not legal advice."}