CFR›Title 40›Chapter I›Part 144›Subpart G›Subject Group Definition of Class V Injection Wells ContainsSections § 144.80–§ 144.81CorpusDaily eCFRDisplayed edition2026-10-01Last updated2026-10-01 Sections § 144.80 § 144.80 What is a Class V injection well? § 144.81 § 144.81 Does this subpart apply to me?