CFR > Title 40 > Chapter I > Subchapter D > Part 131 > Subpart B CFR > Title 40 > Chapter I > Subchapter D > Part 131 > Subpart B – Establishment of Water Quality Standards Current as of: 2024 | Check for updates | Other versions § 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
