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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter D - Water Programs |
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Part 131 - Water Quality Standards |
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Subpart C - Procedures for Review and Revision of Water Quality Standards |
| § 131.20 - State review and revision of water quality standards. |
| § 131.21 - EPA review and approval of water quality standards. |
| § 131.22 - EPA promulgation of water quality standards. |