---
kind: "section"
citation: "40 C.F.R. § 412.25"
title: "40"
number: "412.25"
heading: "New source performance standards (NSPS)."
url: "https://uscodex.org/cfr/40/412.25"
---

# §412.25. New source performance standards (NSPS).

- (a) Except as provided in [paragraph (b)](#b) of this section, any new source subject to this subpart must achieve the following performance standards: There must be no discharge of process waste water pollutants into U.S. waters.
- (b) Whenever rainfall events cause an overflow of process wastewater from a facility designed, constructed, operated, and maintained to contain all process-generated wastewaters plus the runoff from a 25-year, 24-hour rainfall event at the location of the point source, any process wastewater pollutants in the overflow may be discharged into U.S. waters.

## Notes

### Authority

Authority: 33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, 1361.

### Source

Source: 68 FR 7269, Feb. 12, 2003, unless otherwise noted.