{"data":{"id":"us/40-cfr-147.1153","jurisdiction":"us","citation":"40 CFR 147.1153","heading":"Existing Class II disposal wells authorized by rule in Indian country.","body":"The owner or operator shall limit injection pressure to the lesser of:\n(a) A value which will not exceed the operating requirements of § 144.28(f)(3)(i) or (ii) of this chapter as applicable; or\n(b) A value for well head pressure calculated by using the following formula:\nPm = (0.800−0.433 Sg)d\nWhere:\nPm = injection pressure at the well head in pounds per square inch.\nSg = specific gravity of injected fluid (unitless).\nd = injection depth in feet.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER D—WATER PROGRAMS","PART 147—STATE, TRIBAL, AND EPA-ADMINISTERED UNDERGROUND INJECTION CONTROL PROGRAMS","Subpart X—Michigan"],"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":"3cd4e517119b742d9a15e9dc8578b81a66b5ab95de8200a3bb0c9af6c9d3b1b8","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-147.1152","next":"us/40-cfr-147.1154"},"notice":"GroundRules: Original legal text. Not legal advice."}