---
kind: "section"
citation: "40 C.F.R. § 420.46"
title: "40"
number: "420.46"
heading: "Pretreatment standards for new sources (PSNS)."
url: "https://uscodex.org/cfr/40/420.46"
---

# §420.46. Pretreatment standards for new sources (PSNS).


Except as provided in [40 CFR 403.7](/cfr/40/403.7.md), any new 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 new sources.

- (a) **Basic oxygen furnace steelmaking—semi-wet; and electric arc furnace steelmaking—semi-wet.** No discharge of process wastewater pollutants to navigable waters.
- (b) **Basic oxygen furnace steelmaking—wet-suppressed combustion.**
- (c) **Basic oxygen furnace steelmaking—wet—open combustion; electric arc furnace steelmaking—wet.**

## Notes

### Amendments

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982; 67 FR 64268, Oct. 17, 2002]

### Authority

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

### Source

Source: 47 FR 23284, May 27, 1982, unless otherwise noted.

### Amendments

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982; 67 FR 64268, Oct. 17, 2002]