{"data":{"id":"us/40-cfr-table-nn-1-to-subpart-nn-of-part-98","jurisdiction":"us","citation":"40 CFR Table NN-1 to Subpart NN of Part 98","heading":"Table NN-1 to Subpart NN of Part 98—Default Factors for Calculation Methodology 1 of This Subpart","body":"Fuel Default higher heating value 1 Default CO2 emission factor (kg CO2/MMBtu)\nNatural Gas 1.026 MMBtu/Mscf 53.06\nPropane 3.84 MMBtu/bbl 62.87\nNormal butane 4.34 MMBtu/bbl 64.77\nEthane 2.85 MMBtu/bbl 59.60\nIsobutane 4.16 MMBtu/bbl 64.94\nPentanes plus 4.62 MMBtu/bbl 70.02\n1 Conditions for higher heating values presented in MMBtu/bbl are 60 °F and saturation pressure.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 98—MANDATORY GREENHOUSE GAS REPORTING","Subpart NN—Suppliers of Natural Gas and Natural Gas Liquids"],"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":"3d3bb813ae908d5fbee4df92b9e434aa7cf03a4eec4c797a7592a1f2083bd033","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-98.408","next":"us/40-cfr-table-nn-2-to-subpart-nn-of-part-98"},"notice":"GroundRules: Original legal text. Not legal advice."}