40 CFR Part 144 - Subpart C - Authorization of Underground Injection by Rule
- § 144.21 Existing Class I, II (except enhanced recovery and hydrocarbon storage) and III wells.
- § 144.22 Existing Class II enhanced recovery and hydrocarbon storage wells.
- § 144.23 Class IV wells.
- § 144.24 Class V wells.
- § 144.25 Requiring a permit.
- § 144.26 Inventory requirements.
- § 144.27 Requiring other information.
- § 144.28 Requirements for Class I, II, and III wells authorized by rule.