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Regulations last checked for updates: Apr 30, 2025
Title 40 - Protection of Environment last revised: Nov 30, 2025
All Titles
Title 40
Chapter I
Part 146 - PART 146—UNDERGROUND INJECTION CONTROL PROGRAM: CRITERIA AND STANDARDS
Subpart A [§ 146.1 - § 146.10] - Subpart A—General Provisions
Subpart B [§ 146.11 - § 146.16] - Subpart B—Criteria and Standards Applicable to Class I Wells
Subpart C [§ 146.21 - § 146.24] - Subpart C—Criteria and Standards Applicable to Class II Wells
Subpart D [§ 146.31 - § 146.34] - Subpart D—Criteria and Standards Applicable to Class III Wells
Subpart E - Subpart E—Criteria and Standards Applicable to Class IV Injection Wells [Reserved]
Subpart F [§ 146.51 - § 146.51] - Subpart F—Criteria and Standards Applicable to Class V Injection Wells
Subpart G [§ 146.61 - § 146.73] - Subpart G—Criteria and Standards Applicable to Class I Hazardous Waste Injection Wells
Subpart H [§ 146.81 - § 146.95] - Subpart H—Criteria and Standards Applicable to Class VI Wells
authority:
Safe Drinking Water Act,
42 U.S.C. 300f
source:
45 FR 42500, June 24, 1980, unless otherwise noted.
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