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40 CFR § 116.2 - Abbreviations.

---
identifier: "/us/cfr/t40/s116.2"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 116.2 - Abbreviations."
title_number: 40
title_name: "Protection of Environment"
section_number: "116.2"
section_name: "Abbreviations."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "116"
part_name: "DESIGNATION OF 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"
cfr_part: "116"
---

# 116.2 Abbreviations.

ppm = parts per million

mg = milligram(s)

kg = kilogram(s)

mg/l = milligrams(s) per liter= (approx.) ppm

mg/kg = milligram(s) per kilogram= (approx.) ppm

[43 FR 10474, Mar. 13, 1978]