40 CFR § 439.25 - New source performance standards (NSPS).

---
identifier: "/us/cfr/t40/s439.25"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 439.25 - New source performance standards (NSPS)."
title_number: 40
title_name: "Protection of Environment"
section_number: "439.25"
section_name: "New source performance standards (NSPS)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "439"
part_name: "PHARMACEUTICAL 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: "48 FR 49821, Oct. 27, 1983, unless otherwise noted."
cfr_part: "439"
---


# 439.25 New source performance standards (NSPS).

(a) Any new source subject to this subpart must achieve the following standards:

Performance Standards (NSPS)

| Regulated parameter | Maximum daily | Maximum monthly average |
| --- | --- | --- |
| BOD | 35 | 18 |
| TSS | 58 | 31 |
| COD | 228 | 86 |
| mg/L (ppm) |  |  |

(b) Any new source subject to the provisions of this section that commenced discharging after November 21, 1988, and prior to November 20, 1998, must continue to achieve the standards specified for this section in the 1988 edition of 40 CFR part 439, until the expiration of the applicable time period specified in 40 CFR 122.29(d)(1), after which the source must achieve the standards specified in §§ 439.23 and 439.24.

[68 FR 12273, Mar. 13, 2003]