40 CFR § 129.1 - Scope and purpose.

---
identifier: "/us/cfr/t40/s129.1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 129.1 - Scope and purpose."
title_number: 40
title_name: "Protection of Environment"
section_number: "129.1"
section_name: "Scope and purpose."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "129"
part_name: "TOXIC POLLUTANT EFFLUENT STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 307, 308, 501, Federal Water Pollution Control Act Amendments of 1972 (Pub. L. 92-500, 86 Stat. 816, (33 U.S.C. 1251 ))."
regulatory_source: "42 FR 2613, Jan. 12, 1977, unless otherwise noted."
cfr_part: "129"
---


# 129.1 Scope and purpose.

(a) The provisions of this subpart apply to owners or operators of specified facilities discharging into navigable waters.

(b) The effluent standards or prohibitions for toxic pollutants established in this subpart shall be applicable to the sources and pollutants hereinafter set forth, and may be incorporated in any NPDES permit, modification or renewal thereof, in accordance with the provisions of this subpart.

(c) The provisions of 40 CFR parts 124 and 125 shall apply to any NPDES permit proceedings for any point source discharge containing any toxic pollutant for which a standard or prohibition is established under this part.