The GHGRP requires reporting of greenhouse gas (GHG) data and other relevant information from large GHG emission sources, fuel and industrial gas suppliers, and CO2 injection sites in the United States. Approximately 8,000 facilities are required to report their emissions annually, and the reported data are made available to the public in October of each year.
The GHGRP collects key information regarding the supply, underground injection, and geologic sequestration of carbon dioxide (CO2) in the United States. Data from these activities are reported under the following GHGRP subparts:
- Suppliers of CO2 (subpart PP) covers facilities that capture CO2 from industrial sources and processes or extract it from natural CO2-bearing formations for supply into the economy.
- Underground injection of CO2 (subpart UU) covers facilities not reporting under subpart RR that inject CO2 underground for the enhanced recovery of oil and natural gas, acid gas injection/disposal, carbon storage research and development (R&D), or for any other purpose other than geologic sequestration.
- Geologic sequestration of CO2 (subpart RR) provides a mechanism for facilities to monitor and report to EPA amounts of CO2 sequestered. Facilities submit a plan for monitoring, reporting and verifying CO2 sequestered underground. Once the plan is approved, facilities report basic information on CO2 received for injection, data related to the amounts of CO2 sequestered, and annual monitoring activities.
The GHGRP also collects information regarding GHG emissions from the supply of fossil fuels in the United States. This includes methane emissions from the oil and gas industry (subpart W for upstream operations, transmission, storage and distribution; subpart Y for refineries); and emissions from underground coal mines (subpart FF), such as methane concentrations in mine ventilation air and methane volumes released from degasification systems.