Mobile Sources Final Rule: Mandatory Reporting of Greenhouse Gases United States Environmental Protection Agency Under the Mandatory Reporting of Greenhouse Gases (GHGs) rule, all vehicle and engine manufacturers1 outside of the light-duty sector2 must report emission rates of carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4) from the products they supply. EPA is not requiring reporting of mobile source emissions or activity data from fleet operators or state and local governments. EPA incorporated the GHG reporting requirements for vehicle and engine manufacturers into the long- standing conventional ("criteria") pollutant testing and reporting requirements under Title II of the Clean Air Act. Wherever possible, we based the new reporting requirements on existing measurement methods and plan to use existing data collection systems. How Is This Source Category Defined and What GHGs Must Be Reported? Manufacturers of the following mobile source categories... Highway heavy-duty vehicles (chassis-certified) Highway heavy-duty engines Highway motorcycles Nonroad diesel engines Marine diesel engines Locomotive engines Nonroad small spark ignition engines Nonroad large spark ignition engines Marine spark ignition engines/personal watercraft Snowmobiles Off-highway motorcycles and ATVs Aircraft engines0 must report the following GHGs... CO2, N2Oa, CKt C02, N20a, CH4 C02, N20a, CH4 C02, N20a, CH4 CO2, N2O, a'b CH4b C02, N20a, CH4 C02, N20a, CH4 C02, N20a, CH4 C02, N20a, CH4 C02, N20a, CH4 C02, N20a, CH4 C02, NOX in units of. . . grams per mile grams per bhp-hour grams per kilometer grams per kilowatt- hour grams per kilowatt- hour grams per bhp-hour grams per kilowatt- hour grams per kilowatt- hour grams per kilowatt- hour grams per kilowatt- hour grams per kilometer grams per kilonewton for new vehicles and engines certified under or subject to the Code of Federal Regulations (CFR) Title 40, including amendments to these parts. 86 86, 1065 86 89, 1039, 1065 94, 1042, 1065 1033, 1065 90, 1054, 1065 1048, 1065 1045, 1065 1051, 1065 86, 1051 87 N2O requirements only apply to new engines equipped with NOX aftertreatment technology. b Except C3 marine engines. c Only applies to turbofan and turbojet engines in production in 2011 with a rated output greater than 26.7 kilonewtons. 1 The term "manufacturer" in this information sheet means a company that is subject to EPA's mobile source emission certification requirements. This category primarily includes companies that manufacture engines domestically and foreign manufacturers that import engines into the U.S. market. In some cases, it also includes domestic companies that are required to meet EPA certification requirements when they import foreign-manufactured engines. 2 The light-duty sector includes cars, SUVs, small pickup trucks and vans. September 2009 EPA-430-F-09-047(R) ------- These new GHG reporting requirements do not apply to manufacturers treated as a "small business" or "small-volume manufacturers" under EPA's existing mobile source emission regulations.3 Unique definitions of "small" apply to manufacturers of different mobile source categories. See the respective sections of CFR for details. How Should GHG Emissions Be Calculated? To measure emission rates, manufacturers must use prescribed testing and measurement procedures, most of which are already used for existing criteria pollutant reporting requirements. These procedures vary by mobile source category and pollutant. For more information on these procedures, please see the preamble and the amendments to the respective sections of CFR. What Information Must Be Reported? Manufacturers must report GHG emission rates of new vehicles and engines at the same time and through the same process as they currently follow for criteria pollutant emission certification. Reporting requirements apply beginning with the 2011 model year for CO2 and the 2012 model year for CH4. N2O reporting requirements apply beginning with the 2013 model year or when the manufacturer introduces NOX aftertreatment technology, whichever is later. In place of N2O and/or CH4test data for each engine family, manufacturers may submit alternative test data and/or other information that will give EPA a reasonable basis for estimating the engine's emission rates. For more information on this provision, see the preamble. 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 parties 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. 3 Small business manufacturers will continue to be subject to measurement and/or reporting requirements for compliance with existing regulations. September 2009 2 EPA-430-F-09-047(R) ------- |