40 CFR 97.3 - Measurements, abbreviations, and acronyms.

Regulations last checked for updates: May 02, 2025

Title 40 - Protection of Environment last revised: Nov 02, 2025

§ 97.3 - Measurements, abbreviations, and acronyms.

Measurements, abbreviations, and acronyms used in this part are defined as follows:

Btu-British thermal unit.

CO2-carbon dioxide.

hr-hour.

kW-kilowatt electrical.

kWh-kilowatt hour.

lb-pounds.

mmBtu-million Btu.

MWe-megawatt electrical.

NOX-nitrogen oxides.

O2-oxygen.

ton-2000 pounds.

authority: 42 U.S.C. 7401,7403,7410,7426,7491,7601,and,

source: 65 FR 2727, Jan. 18, 2000, unless otherwise noted. 71 FR 25396, 25422, and 25443, Apr. 28, 2006

cite as: 40 CFR 97.3