CFR › Title 40 › Part 147 › §147.215340 CFR §147.2153Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkMaximum injection pressure. The owner or operator shall limit injection pressure to the lesser of:(a)A value which will not exceed the operating requirements of § 144.28(f)(3) (i) or (ii) as applicable or(b)A value for well head pressure calculated by using the following formula: