United States
Guide  for State and Local Agencies
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Final Rule: Mandatory Reporting of Greenhouse Gases


The Mandatory Reporting of Greenhouse Gases (GHGs) rule requires in general that annual
reports be submitted to EPA by suppliers of fossil fuels and industrial GHGs, manufacturers of
vehicles and engines outside of the light duty sector, and downstream facilities that emit 25, 000
metric tons or more CO 2 equivalent per year. The GHG emissions that must be reported are
carbon dioxide (CO 2), methane (CH^, nitrous oxide (N2O), hydrofluorocarbons (HFCs),
perfluorocarbons (PFCs), sulfur hexafluoride (SF6), and other fluorinated compounds.

Purpose of the Rule

The FY 2008 Consolidated Appropriations Act (December 26, 2007) authorized EPA to develop a
mandatory reporting program for GHG emissions above appropriate thresholds in all sectors of the U.S.
economy. The goal of the reporting program is to provide accurate and timely data, which will be used to
help guide future policies on climate change.

How does this rule relate to other state and  regional  reporting and reduction
programs?

There are several existing state and regional GHG reporting and reduction programs. These are important
programs that not only led the way in reporting of GHG emissions before the Federal government acted
but also assist in quantifying the GHG reductions achieved by various policies. Many of these programs
collect different or additional data as compared to this rule. For example, state programs may establish
lower thresholds for reporting or requesting information on areas not addressed in EPA's reporting rule
(e.g., electricity use or emission related to other indirect sources).  States collecting additional information
have determined that these  data are necessary to implement their specific climate policies and programs.
State and regional programs are crucial to achieving emissions reductions, and this rule  does not preempt
any other programs.

EPA's GHG reporting rule is a specific action that was specifically developed in response to the
Appropriations Act, and therefore is targeted to accomplish the purpose of the language of the
Appropriations Act  and serve EPA's purposes under the Clean Air Act. As state experience has
demonstrated, EPA  recognizes that in order to address the breadth of climate change issues there will
likely be a need to collect additional data from sources subject to this rule as well as other sources.  The
timing and nature of these additional needs will be dependent on the types of programs and actions the
EPA has underway or may develop and implement in response to future policy developments and/or new
requests from Congress.  Addressing climate change will require a suite of policies and  programs and this
reporting rule is just one effort to collect information to inform those policies.
EPA is committed to working with state and regional programs to coordinate implementation of reporting
programs, reduce the burden on reporters, provide timely access to verified emissions data, establish
mechanisms to efficiently share data, and harmonize data systems to the extent possible.
40 CFR 98                                                                 EPA-430-F-09-048R
September 2009

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Will states and municipalities have to report emissions from their facilities?

States, municipalities, and tribes could be required to submit an annual GHG report if they own
or operate facilities subject to the rule. Landfills and stationary combustion equipment are the
most likely types of facilities that might trigger applicability. The rule applies to all types of
stationary combustion equipment (except for emergency generators and portable equipment) if
the aggregate maximum rated heat input capacity of all stationary fuel combustion units at a
facility is 30 million British thermal units per hour (mmBtu/hr) or greater, and the facility emits
25,000 metric tons or more of carbon dioxide equivalent (CC^e) per year from all stationary fuel
combustion sources. The rule applies to landfills that generate CH4 in amounts equal to 25,000
metric tons of CC^e or more per year. It also applies to municipal power generation plants that
report to the EPA Acid Rain Program or emit 25,000 metric tons or more of CC^e per year. EPA
has developed an Applicability Tool  to aid in assessing whether they are required to report under
the rule, which is available at:
http://www.epa.gov/climatechange/emissions/GHG-calculator/index.html.
How will data be efficiently shared among existing state GHG programs and
this new federal reporting program?

Reporting entities will report directly to EPA.  In order to reduce the burden of reporting, EPA staff is
working with states, The Climate Registry and the Exchange Network on a data exchange standard for
GHG reporting. EPA is  also committed to working with state and regional programs to provide timely
access to verified emissions data, establish mechanisms to share data efficiently, and harmonize data
systems to the extent possible.  We are working to create an expanded version of the Consolidated
Emission Reporting Schema (CERS), a data reporting format broadly adopted by facilities and states for
air pollution reporting to EPA's National Emissions Inventory, which will be compatible with the GHG
Mandatory Reporting Rule. We are also working to ensure GHG data collected and published by EPA in
electronic formats including CERS is compatible with the needs of states and other GHG stakeholders.

For more information

This document is provided solely for informational purposes. It does not provide legal advice, have
legally binding effect, or expressly or implicitly create, expand, or limit any legal rights, obligations,
responsibilities, expectations, or benefits in regard to any person. The series of information sheets is
intended to assist reporting facilities/owners in understanding key provisions of the final rule.

Visit EPA's Web site (www.epa.gov/climatechange/emissions/ghgrulemaking.html) for more
information, including the final preamble and rule,  additional information sheets on specific industries,
the schedule for training  sessions, and other documents and tools. For questions that cannot be answered
through the Web site, please contact us at: ghgmrr@epa.gov.
40 CFR 98                                                                  EPA-430-F-09-048R
September 2009

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