Part 131—Water Quality Standards

1. CFR
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3. Title 40
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5. Chapter I
6. ›
7. Part 131

Subparts

• A
  Subpart A—General Provisions Sections 131.1–131.8
• B
  Subpart B—Establishment of Water Quality Standards Sections 131.9–131.15
• C
  Subpart C—Procedures for Review and Revision of Water Quality Standards Sections 131.20–131.22
• D
  Subpart D—Federally Promulgated Water Quality Standards Sections 131.31–131.48