Part 131. WATER QUALITY STANDARDS

• SUBPART A [§ 131.1 - § 131.8] - General Provisions
• SUBPART B [§ 131.10 - § 131.15] - Establishment of Water Quality Standards
• SUBPART C [§ 131.20 - § 131.22] - Procedures for Review and Revision of Water Quality Standards
• SUBPART D [§ 131.31 - § 131.47] - Federally Promulgated Water Quality Standards