40 CFR 131.13 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (Parts 100-103 To § 135.13) — Environmental Protection Agency (Continued) (Parts 100-103 To § 135.13) — Water Programs (Parts 100-103 To § 135.13) — Water Quality Standards (§ 131.1 To § 131.44) — Establishment Of Water Quality Standards (§ 131.10 To § 131.15) — General policies.
4 Aug 2016
States may, at their discretion, include in their State standards, policies generally affecting their application and implementation, such as mixing zones, low flows and variances. Such policies are subject to EPA review and approval.