40 CFR § 437.14 - New source performance standards (NSPS).

---
identifier: "/us/cfr/t40/s437.14"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 437.14 - New source performance standards (NSPS)."
title_number: 40
title_name: "Protection of Environment"
section_number: "437.14"
section_name: "New source performance standards (NSPS)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "437"
part_name: "THE CENTRALIZED WASTE TREATMENT POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, and 1361."
regulatory_source: "65 FR 81300, Dec. 22, 2000, unless otherwise noted."
cfr_part: "437"
---


# 437.14 New source performance standards (NSPS).

(a) Except as provided in § 437.10(b), any new source subject to this subpart must achieve the following performance standards:

Performance Standards

| Regulatedparameter | Maximum daily | Maximum monthly avg. |
| --- | --- | --- |
|  |  |  |
| O&G | 205 | 50.2 |
| pH | () | () |
| TSS | 29.6 | 11.3 |
|  |  |  |
| Antimony | 0.111 | 0.0312 |
| Arsenic | 0.0993 | 0.0199 |
| Cadmium | 0.782 | 0.163 |
| Chromium | 0.167 | 0.0522 |
| Cobalt | 0.182 | 0.0703 |
| Copper | 0.659 | 0.216 |
| Lead | 1.32 | 0.283 |
| Mercury | 0.000641 | 0.000246 |
| Nickel | 0.794 | 0.309 |
| Selenium | 0.176 | 0.0698 |
| Silver | 0.0318 | 0.0122 |
| Tin | 0.0955 | 0.0367 |
| Titanium | 0.0159 | 0.00612 |
| Vanadium | 0.0628 | 0.0518 |
| Zinc | 0.657 | 0.252 |
| mg/L (ppm). |  |  |
| Within the range 6 to 9. |  |  |

(b) In-plant standards for cyanide are the same as the limitations specified in § 437.11(b).