U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 31, 2025

All TitlesTitle 40Chapter IPart 146Subpart A - Subpart A—General Provisions
§ 146.1 - Applicability and scope.
§ 146.2 - Law authorizing these regulations.
§ 146.3 - Definitions.
§ 146.4 - Criteria for exempted aquifers.
§ 146.5 - Classification of injection wells.
§ 146.6 - Area of review.
§ 146.7 - Corrective action.
§ 146.8 - Mechanical integrity.
§ 146.9 - Criteria for establishing permitting priorities.
§ 146.10 - Plugging and abandoning Class I, II, III, IV, and V wells.
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