---
kind: "section"
citation: "40 C.F.R. § 131.13"
title: "40"
number: "131.13"
heading: "General policies."
url: "https://uscodex.org/cfr/40/131.13"
---

# §131.13. General policies.


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.


## Notes

### Authority

Authority: 33 U.S.C. 1251 et seq.

### Source

Source: 48 FR 51405, Nov. 8, 1983, unless otherwise noted.