---
kind: "section"
citation: "40 C.F.R. § 415.344"
title: "40"
number: "415.344"
heading: "Pretreatment standards for existing sources (PSES)."
url: "https://uscodex.org/cfr/40/415.344"
---

# §415.344. Pretreatment standards for existing sources (PSES).

- (a) Existing sources which annually introduce less than 210,000 cubic meters per year (55 million gallons per year) of chrome pigments process wastewater into a publicly owned treatment works are subject only to the standards specified in [40 CFR part 403](/cfr/40/part403.md).
- (b) Except as provided in 40 CFR [403.7](/cfr/40/403.7.md) and [403.13](/cfr/40/403.13.md) and [paragraph (a)](#a) of this section, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with [40 CFR part 403](/cfr/40/part403.md) and achieve the following pretreatment standards for existing sources (PSES):

## Notes

### Authority

Authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

### Source

Source: 47 FR 28278, June 29, 1982, unless otherwise noted.