40 CFR § 438.15 - New source performance standards (NSPS).

---
identifier: "/us/cfr/t40/s438.15"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 438.15 - New source performance standards (NSPS)."
title_number: 40
title_name: "Protection of Environment"
section_number: "438.15"
section_name: "New source performance standards (NSPS)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "438"
part_name: "METAL PRODUCTS AND MACHINERY 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: "68 FR 25735, May 13, 2003, unless otherwise noted."
cfr_part: "438"
---


# 438.15 New source performance standards (NSPS).

New point sources subject to this subpart must achieve the new source performance standards (NSPS) for TSS, O&G (as HEM), and pH, which are the same as the corresponding limitation specified at § 438.12. The performance standards apply with respect to each new point source that commences discharge after June 12, 2003.