40 C.F.R. Table W-7 to Subpart W of Part 98

Default Methane Emission Factors for Internal Combustion Equipment

Last amended: 2025Year: 2026Length: 34 wordsOfficial source

Cite as 40 C.F.R. Table W-7 to Subpart W of Part 98 (2026)

Internal combustion equipment type Emission factor (kg CH 4 /mmBtu) Reciprocating Engine, 2-stroke lean-burn 0.658 Reciprocating Engine, 4-stroke lean-burn 0.522 Reciprocating Engine, 4-stroke rich-burn 0.045 Gas Turbine 0.004 [89 FR 42327, May 14, 2024]
40 C.F.R. Table W-7 to Subpart W of Part 98: Default Methane Emission Factors for Internal Combustion Equipment | Justis AI