{"data":{"id":"us/40-cfr-table-w-5-to-subpart-w-of-part-98","jurisdiction":"us","citation":"40 CFR Table W-5 to Subpart W of Part 98","heading":"Table W-5 to Subpart W of Part 98—Default Methane Population Emission Factors","body":"Industry segment Source type/component Emission factor (scf methane/hour/ component)\nPopulation Emission Factors—LNG Storage Compressor, Gas Service\nLNG storage Vapor Recovery Compressor 1 4.17\nLNG import and export equipment\nPopulation Emission Factors—Below Grade Transmission-Distribution Transfer Station Components and Below Grade Metering-Regulating Station 2 Components, Gas Service 3\nNatural gas distribution Below Grade T-D Transfer Station 0.30\nBelow Grade M\u0026R Station 0.30\nPopulation Emission Factors—Distribution Mains, Gas Service 4\nNatural gas distribution Unprotected Steel 5.1\nProtected Steel 0.57\nPlastic 0.17\nCast Iron 6.9\nPopulation Emission Factors—Distribution Services, Gas Service 5\nNatural gas distribution Unprotected Steel 0.086\nProtected Steel 0.0077\nPlastic 0.0016\nCopper 0.03\nPopulation Emission Factors—Interconnect, Direct Sale, or Farm Tap Stations 2 3\nOnshore natural gas transmission pipeline Transmission Company Interconnect M\u0026R Station 166\nDirect Sale or Farm Tap Station 1.3\nPopulation Emission Factors—Transmission Pipelines, Gas Service 4\nOnshore natural gas transmission pipeline Unprotected Steel 0.74\nProtected Steel 0.041\nPlastic 0.061\nCast Iron 27\n1 Emission Factor is in units of “scf methane/hour/compressor.”\n2 Excluding customer meters.\n3 Emission Factor is in units of “scf methane/hour/station.”\n4 Emission Factor is in units of “scf methane/hour/mile.”\n5 Emission Factor is in units of “scf methane/hour/number of services.”","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 98—MANDATORY GREENHOUSE GAS REPORTING","Subpart W—Petroleum and Natural Gas Systems"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"c684678a97cdf9823cbc87ffc8f2feaee2ce946eaf0fb8cf4057d631908250c0","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-w-4-to-subpart-w-of-part-98","next":"us/40-cfr-table-w-6-to-subpart-w-of-part-98"},"notice":"GroundRules: Original legal text. Not legal advice."}