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40 CFR § 117.2 - Abbreviations.

---
identifier: "/us/cfr/t40/s117.2"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 117.2 - Abbreviations."
title_number: 40
title_name: "Protection of Environment"
section_number: "117.2"
section_name: "Abbreviations."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "117"
part_name: "DETERMINATION OF REPORTABLE QUANTITIES FOR HAZARDOUS SUBSTANCES"
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authority: "33 U.S.C. 1251  and Executive Order 11735, superseded by Executive Order 12777, 56 FR 54757."
regulatory_source: "44 FR 50776, Aug. 29, 1979, unless otherwise noted."
cfr_part: "117"
---

# 117.2 Abbreviations.

NPDES equals National Pollutant Discharge Elimination System. RQ equals reportable quantity.