CFR›Title 40›Chapter I›Part 144›Subpart G›Subject Group Definition of Class V Injection Wells ContainsSections 144.80–144.81CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Sections 144.80 § 144.80 What is a Class V injection well? 144.81 § 144.81 Does this subpart apply to me? Previous Additional Requirements for Class V Large-Capacity Cesspools and Motor Vehicle Waste Disposal Wells Additional Requirements for Class V Large-Capacity Cesspools and Motor Vehicle Waste Disposal Wells Next Requirements for All Class V Injection Wells Requirements for All Class V Injection Wells