---identifier: "/us/cfr/t40/s410.21"source: "ecfr"legal_status: "authoritative_unofficial"title: "40 CFR § 410.21 - Specialized definitions."title_number: 40title_name: "Protection of Environment"section_number: "410.21"section_name: "Specialized definitions."chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"subchapter_number: "N"subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"part_number: "410"part_name: "TEXTILE MILLS POINT SOURCE CATEGORY"positive_law: falsecurrency: "2026-03-24"last_updated: "2026-03-24"format_version: "1.1.0"generator: "[email protected]"authority: "Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), and 1361; 86 Stat. 186 Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217."regulatory_source: "47 FR 38819, Sept. 2, 1982, unless otherwise noted."cfr_part: "410"---
Identifier
/us/cfr/t40/s410.21
Currency
2026-03-24
Positive Law
No
Updated
2026-03-24
Chapter
Environmental Protection Agency
Authority
Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act o... Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), and 1361; 86 Stat. 186 Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.
# 410.21 Specialized definitions.In addition to the definitions set forth in 40 CFR part 401 and § 410.01 of this part, the following definition applies to this subpart:(a) The term *fiber* shall mean the dry wool and other fibers as received at the wool finsihing mill for processing into wool and blended products.(b) [Reserved]