{"data":{"id":"us/40-cfr-425.81","jurisdiction":"us","citation":"40 CFR 425.81","heading":"Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).","body":"Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):\nPollutant or pollutant property BPT limitations\nMaximum for any 1 day Maximum for monthly average\nKg/kkg (or pounds per 1,000 lb) of raw material\nBOD5 7.0 3.2\nTSS 10.1 4.6\nOil and grease 3.0 1.3\nTotal chromium 0.18 0.07\npH (1) (1)\n1 Within the range 6.0 to 9.0.","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 H—Pigskin 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":"309d3fe359d12c3f7693818fcb5adf60cf7715abf07e8e8aa7f6597768389628","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-425.80","next":"us/40-cfr-425.82"},"notice":"GroundRules: Original legal text. Not legal advice."}