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Regulations last checked for updates: Jun 15, 2025
Title 40 - Protection of Environment last revised: Nov 15, 2025
All Titles
Title 40
Chapter I
Part 239
Subpart D - Subpart D—Adequacy Determination Procedures
§ 239.10 - Criteria and procedures for making adequacy determinations.
§ 239.11 - Approval procedures for partial approval.
§ 239.12 - Modifications of state programs.
§ 239.13 - Criteria and procedures for withdrawal of determination of adequacy.
authority:
42 U.S.C. 6912
,
6945
source:
63 FR 57040, Oct. 23, 1998, unless otherwise noted.
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