Subpart W – Petroleum and Natural Gas Systems

This page provides resources for subpart W reporters, including implementation information as well as links to supporting documents for relevant rulemakings and data products associated with subpart W.

• Summary
• Reporter Resources
• Reported Data
• Regulatory History

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Summary

Owners or operators of facilities that contain petroleum and natural gas systems and emit 25,000 metric tons or more of GHGs per year (expressed as carbon dioxide equivalents) report GHG data to EPA. Owners or operators collect GHG data; calculate GHG emissions; and follow the specified procedures for quality assurance, missing data, recordkeeping, and reporting. Subpart W consists of emission sources in ten segments of the petroleum and natural gas industry.

Additional Resources

• GHGRP Oil and Gas Dashboard
• Additional information about emissions from the oil and natural gas industry and GHGRP
• StoryMaps about Subpart W industry segments and GHGRP 
• EPA’s Request for Information on the use of advanced technologies for quantification of methane in the GHGRP

Reporter Resources

• Subpart W Information Sheet
• Subpart W Reporting Instructions
• Training Presentations

Reported Data

• Data Highlights: summary of emissions data from the most recent Reporting Year.
  • Onshore Production: summary of emissions data from the most recent Reporting Year in the onshore production and gathering and boosting segments.
  • Other Industry Segments: summary of emissions data from the most recent Reporting Year for all other industry segments.
  • Emission Sources: crosswalk of emissions by source and industry segment from the most recent Reporting Year.
• Sector Profile: more detailed information about emissions from the most recent Reporting Year.
• Data Publication FAQs

Regulatory History

Rulemaking Resources: Links to Subpart W rules and associated documents.

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