40 CFR § 420.134 - New source performance standards (NSPS).

---
identifier: "/us/cfr/t40/s420.134"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 420.134 - New source performance standards (NSPS)."
title_number: 40
title_name: "Protection of Environment"
section_number: "420.134"
section_name: "New source performance standards (NSPS)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "420"
part_name: "IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, and 1361."
regulatory_source: "47 FR 23284, May 27, 1982, unless otherwise noted."
cfr_part: "420"
---


# 420.134 New source performance standards (NSPS).

New sources subject to this subpart must achieve the following new source performance standards (NSPS), as applicable.

(a) *Direct-reduced iron.*

Subpart M—New Source Performance Standards (NSPS)

| Pollutant | Maximum daily | Maximum monthly avg. |
| --- | --- | --- |
| TSS | 0.00998 | 0.00465 |
| pH | () | () |
| Pounds per thousand pound of product. |  |  |
| Within the range of 6.0 to 9.0. |  |  |

(b) *Forging operations.*

Subpart M—New Source Performance Standards (NSPS)

| Pollutant | Maximum daily | Maximum monthly avg. |
| --- | --- | --- |
| O&G (as HEM) | 0.00746 | 0.00446 |
| TSS | 0.0123 | 0.00508 |
| pH | () | () |
| Pounds per thousand pound of product. |  |  |
| Within the range of 6.0 to 9.0. |  |  |

(c) *Briquetting.* There shall be no discharge of process wastewater pollutants to waters of the U.S.