40 CFR Part 131 - Subpart B - Establishment of Water Quality Standards
- § 131.9 Protection of Tribal reserved rights.
- § 131.10 Designation of uses.
- § 131.11 Criteria.
- § 131.12 Antidegradation policy and implementation methods.
- § 131.13 General policies.
- § 131.14 Water quality standards variances.
- § 131.15 Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits.