---
kind: "section"
citation: "40 C.F.R. § 408.224"
title: "40"
number: "408.224"
heading: "Pretreatment standards for existing sources."
url: "https://uscodex.org/cfr/40/408.224"
---

# §408.224. Pretreatment standards for existing sources.


Any existing source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with [40 CFR part 403](/cfr/40/part403.md). In addition, the following pretreatment standard establishes the quantity or quality of pollutants or pollutant properties controlled by this section which may be discharged to a publicly owned treatment works by a point source subject to the provisions of this subpart.


## Notes

### Amendments

[40 FR 55789, Dec. 1, 1975, as amended at 60 FR 33946, June 29, 1995]

### Source

Source: 40 FR 55789, Dec. 1, 1975, unless otherwise noted.

### Authority

Authority: Secs. 301, 304 (b) and (c), 306 (b) and (c), 307(c), of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c), 1317(c); 86 Stat. 816 et seq., Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

### Source

Source: 39 FR 23140, June 26, 1974, unless otherwise noted.

### Amendments

[40 FR 55789, Dec. 1, 1975, as amended at 60 FR 33946, June 29, 1995]