40 CFR § 413.60 - Applicability: Description of the chemical etching and milling subcategory.

---
identifier: "/us/cfr/t40/s413.60"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 413.60 - Applicability: Description of the chemical etching and milling subcategory."
title_number: 40
title_name: "Protection of Environment"
section_number: "413.60"
section_name: "Applicability: Description of the chemical etching and milling subcategory."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "413"
part_name: "ELECTROPLATING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 301, 304(g), 307, 308, 309, 402, 405, 501(a), Clean Water Act, as amended, (33 U.S.C. 1311, 1314(g), 1317, 1318, 1319, 1322, 1325 and 1341(a))."
regulatory_source: "46 FR 9467, Jan. 28, 1981, unless otherwise noted."
cfr_part: "413"
---


# 413.60 Applicability: Description of the chemical etching and milling subcategory.

The provisions of this subpart apply to discharges of process wastewaters resulting from the chemical milling or etching of ferrous or nonferrous materials.