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Regulations last checked for updates: Oct 02, 2026
Title 40 - Protection of Environment last revised: Sep 29, 2026
All Titles
Title 40
Chapter I
Part 52 - PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
Subpart A [§ 52.01 - § 52.46] - Subpart A—General Provisions
Subpart B [§ 52.49 - § 52.69] - Subpart B—Alabama
Subpart C [§ 52.70 - § 52.98] - Subpart C—Alaska
Subpart D [§ 52.119 - § 52.153] - Subpart D—Arizona
Subpart E [§ 52.170 - § 52.200] - Subpart E—Arkansas
Subpart F [§ 52.220 - § 52.285] - Subpart F—California
authority:
42 U.S.C. 7401
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