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Title 40

Displaying title 40, up to date as of 7/17/2026. Title 40 was last amended 7/16/2026.
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter DWater Programs100 – 149
Part 123State Program Requirements123.1 – 123.64
Subpart AGeneral123.1 – 123.3
§ 123.1Purpose and scope.
§ 123.2Definitions.
§ 123.3Coordination with other programs.
Subpart BState Program Submissions123.21 – 123.36
Subpart CTransfer of Information and Permit Review123.41 – 123.46
§ 123.41Sharing of information.
§ 123.42Receipt and use of Federal information.
§ 123.43Transmission of information to EPA.
§ 123.44EPA review of and objections to State permits.
§ 123.45Noncompliance and program reporting.
§ 123.46Individual control strategies.
Subpart DProgram Approval, Revision, and Withdrawal123.61 – 123.64
§ 123.61Approval process.
§ 123.62Procedures for revision of State programs.
§ 123.63Criteria for withdrawal of State programs.
§ 123.64Procedures for withdrawal of State programs.