40 CFR 131.1 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (Parts 100-103 To § 135.13) — Environmental Protection Agency (Continued) (Parts 100-103 To § 135.13) — Water Programs (Parts 100-103 To § 135.13) — Water Quality Standards (§ 131.1 To § 131.44) — General Provisions (§ 131.1 To § 131.8) — Scope.

This part describes the requirements and procedures for developing, reviewing, revising, and approving water quality standards by the States as authorized by section 303(c) of the Clean Water Act. Additional specific procedures for developing, reviewing, revising, and approving water quality standards for Great Lakes States or Great Lakes Tribes (as defined in 40 CFR 132.2) to conform to section 118 of the Clean Water Act and 40 CFR part 132, are provided in 40 CFR part 132.