{"data":{"id":"us/40-cfr-434.42","jurisdiction":"us","citation":"40 CFR 434.42","heading":"Effluent limitations guidelines 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 125.30-125.32, 40 CFR 401.17, and §§ 434.61 and 434.63 of this part, the following limitations establish the concentration or quality of pollutants which may be discharged by a point source subject to the provisions of this subpart after application of the best practicable control technology currently available:\nBPT Effluent Limitations\nPollutant or pollutant property Maximum for any 1 day Average of daily values for 30 consecutive days\nConcentration in mg/l\nIron, total 7.0 3.5\nTSS 70. 35.\npH (1) (1)\n1 Within the range 6.0 to 9.0 at all times.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 434—COAL MINING POINT SOURCE CATEGORY BPT, BAT, BCT LIMITATIONS AND NEW SOURCE PERFORMANCE STANDARDS","Subpart D—Alkaline Mine Drainage"],"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":"19d0d490127eeea0571eb0ecd08243541c6c4023651c095564c5ad94c4440e7d","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-434.41","next":"us/40-cfr-434.43"},"notice":"GroundRules: Original legal text. Not legal advice."}