40 CFR § 438.10 - Applicability.

---
identifier: "/us/cfr/t40/s438.10"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 438.10 - Applicability."
title_number: 40
title_name: "Protection of Environment"
section_number: "438.10"
section_name: "Applicability."
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"
---


# 438.10 Applicability.

(a) This subpart applies to process wastewater directly discharged from facilities specified at § 438.1.

(b) This subpart applies to process wastewater discharges from oily operations (as defined at § 438.2(f) and appendix B of this part).

(c) This subpart does not apply to process wastewater discharges from metal-bearing operations (as defined at § 438.2(d) and appendix C of this part).