40 CFR § 425.10 - Applicability; description of the hair pulp, chrome tan, retan-wet finishing subcategory.

---
identifier: "/us/cfr/t40/s425.10"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 425.10 - Applicability; description of the hair pulp, chrome tan, retan-wet finishing subcategory."
title_number: 40
title_name: "Protection of Environment"
section_number: "425.10"
section_name: "Applicability; description of the hair pulp, chrome tan, retan-wet finishing 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"
---


# 425.10 Applicability; description of the hair pulp, chrome tan, retan-wet finishing subcategory.

The provisions of this subpart are applicable to process wastewater discharges resulting from any tannery which, either exclusively or in addition to other unhairing and tanning operation, processes raw or cured cattle or cattle-like hides into finished leather by chemically dissolving the hide hair, chrome tanning, and retan-wet finishing.