40 CFR § 425.40 - Applicability; description of the retan-wet finish-sides subcategory.

---
identifier: "/us/cfr/t40/s425.40"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 425.40 - Applicability; description of the retan-wet finish-sides subcategory."
title_number: 40
title_name: "Protection of Environment"
section_number: "425.40"
section_name: "Applicability; description of the retan-wet finish-sides subcategory."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "425"
part_name: "LEATHER TANNING AND FINISHING 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 (b), (c), (e) and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361."
regulatory_source: "47 FR 52870, Nov. 23, 1982, unless otherwise noted."
cfr_part: "425"
---


# 425.40 Applicability; description of the retan-wet finish-sides subcategory.

The provisions of this subpart are applicable to process wastewater discharges resulting from any tannery which processes previously tanned hides and skins (grain side only) into finished leather by retan-wet finishing.