This page provides an overview of subtopics that are central to Subpart NN reporting:

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• The total annual volume (in thousand standard cubic feet) of Natural Gas delivered to each of the following end-user categories:
  • Residential consumers
  • Commercial consumers
  • Industrial consumers
  • Electricity generating facilities

• When you report the quantity of gas delivered to each of the 4 end-use categories make sure to include the following:
  • Natural Gas delivered and owned by your LDC
  • Natural Gas delivered to end-users by your LDC that IS NOT OWNED by your LDC
  • Any deliveries to facilities whom receive greater than 460,000 mscf of natural gas per year as reported in Equation NN-4.

For NGL Fractionators, Subpart NN requires you to report the following data:

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For LDCs, Subpart NN requires you to report the following data:

• The annual CO₂ quantities quantity (in metric tons) associated with gas delivered to all meters that receive less than 460,000 thousand standard cubic feet per year (excluding CO₂ associated with natural gas stored for future deliveries)
• The annual CO₂ quantities quantity (in metric tons) that would result from the complete combustion or oxidation of the seven reported volumes that follow:
  • The annual volume (in thousand standard cubic feet) of natural gas received at city gate stations for redelivery on the distribution system, including for use by the LDC, and the specific industry standard used to measure this volume
  • The annual volume (in thousand standard cubic feet) of natural gas placed into storage, including gas liquefied and placed into storage
  • The annual volume (in thousand standard cubic feet) of natural gas that is used for deliveries in the reporting year that was not otherwise accounted for in the above reported volume
    • This includes natural gas previously stored on-system which is removed from storage and used for deliveries to customers or other LDCs by the LDC within the reporting year
    • This also includes liquefied natural gas (LNG) produced at on-system vaporization facilities for delivery on the distribution system
    • This also includes natural gas that bypassed the city gate and was delivered directly to LDC systems from producers or natural gas processing plants from local production
  • The annual volume (in thousand standard cubic feet) of natural gas delivered to downstream gas transmission pipelines and other LDCs
  • The annual volume (in thousand standard cubic feet) of natural gas delivered to each meter registering supply equal to or greater than 460,000 thousand standard cubic feet during the calendar year and the customer name, address, meter number, and EIA identification number (if known) of each meter reading used
• All developed EFs and HHVs and the industry standard(s) used to develop them, if you developed site-specific EFs or HHVs
• The number of days in the reporting year for which substitute data procedures were used to measure quantity, develop HHVs, and develop EFs
• The method used (method one or method two) for estimating CO₂ quantities that would result from the complete combustion or oxidation of natural gas supplied

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For NGL Fractionators, Subpart NN requires you to report the following data:

• Annual CO₂ quantities quantity (in metric tons) associated with all NGLs supplied, excluding quantities associated with NGL NGLs received from other fractionators
• Annual CO₂ quantities (in metric tons) associated with the total quantities of NGLs supplied, reported in the following product categories:
  • Ethane
  • Propane
  • Normal butane
  • Isobutane
  • Pentanes plus
• Annual CO₂ quantities (in metric tons) associated with the total quantities of NGLs that are received from other fractionators, reported in the following product categories:
  • Ethane
  • Propane
  • Normal butane
  • Isobutane
  • Pentanes plus
• The annual quantities (in barrels) of ethane, propane, normal butane, isobutane, and pentanes plus supplied to downstream facilities and the specific industry standard used to measure these quantities
• The annual quantities (in barrels) of ethane, propane, normal butane, isobutane and pentanes plus received from other NGL fractionators
• All developed EFs and HHVs and the industry standard(s) used to develop them, if you developed site-specific EFs or HHVs
• The number of days in the reporting year for which substitute data procedures were used to measure quantity, develop HHVs, and develop EFs
• The method used (method one or method two) for estimating CO₂ quantities that would result from the complete combustion or oxidation of each NGL product supplied

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