Federal Fleets using Low-Greenhouse Gas Emitting Vehicles

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Overview

Section 141 of the 2007 Energy Independence and Security Act (EISA) requires federal agencies to acquire low greenhouse gas (GHG) emitting vehicles.

Each model year (MY), EPA evaluates the GHG emissions performance of the light-duty (LD) fleet to determine the maximum allowable GHG emissions level to be designated a low GHG-emitting vehicle.

How do we define a low-GHG emitting vehicle?

EISA 141 compliance levels are based on specific CO2 gram/mile maximum emissions levels. The CO2 emissions level threshold for any given model year is estimated at the levels needed to designate approximately 25% of cars and 25% of LD trucks and medium-duty passenger vehicles (MDPVs) as low emitting. EPA will set EISA 141 thresholds at either these levels for cars and trucks/MDPVs, or at the most stringent standards for vehicle GHG emissions applicable to and enforceable against motor vehicle manufacturers for vehicles sold anywhere in the United States, whichever are lower.

EISA 141 Compliance Thresholds
(maximum grams/mile of CO2 emissions)

Vehicle Type MY2023 MY2024 MY2025
Passenger Cars 250 245 225
Light-duty Trucks, MDPVs 345 330 225
NOTE:

As of MY 2016, FFVs must meet the same thresholds as other cars and trucks regardless of the fuel used. For more details, see the Guidance Document in the: Guidance document and other resources section

What vehicles are considered low GHG-emitting?

Find a low GHG-emitting passenger car or truck for

 

What are the compliance levels by agency/office?

This chart displays the EISA 141 compliance levels by federal agency as reported in the Federal Automotive Statistical Tool.**

Agency/Office Fiscal Year 2022
Compliance		 Fiscal Year 2023
Compliance
Corps of Engineers, Civil Works
14%
41%
Defense Agencies
66%
73%
Department of Agriculture
63%
57%
Department of Air Force
1%
27%
Department of Army
36%
54%
Department of Commerce
29%
31%
Department of Education
30%
55%
Department of Energy
68%
64%
Department of Health and Human Services
19%
50%
Department of Homeland Security
94%
84%
Department of Housing and Urban Development
23%
26%
Department of Justice
8%
15%
Department of Labor
100%
100%
Department of Navy
14%
32%
Department of State
95%
82%
Department of the Interior
78%
59%
Department of the Treasury
96%
95%
Department of Transportation
100%
100%
Department of Veterans Affairs
84%
60%
Environmental Protection Agency
100%
100%
General Services Administration
91%
68%
National Aeronautics and Space Administration
96%
93%
Office of Personnel Management
29%
100%
Social Security Administration
100%
87%
Tennessee Valley Authority
100%
100%
U.S. Postal Service
100%
100%
United States Marine Corps
43%
42%
NOTES:

*Vehicles that use the "functional needs" or "alternative measures" exceptions are considered compliant. For details, see page 8-9 in the guidance document listed in the section below.

**For simplicity, only agencies with 40 or more vehicle acquisitions for the most current fiscal year are displayed. Agencies with fewer acquisitions are still subject to EISA 141.

Guidance document and other resources

Guidance Document

GHG Assessment Tool

Please contact us if you need an earlier version of the tool.

Help with "Alternative Measures"

For assistance with "alternative measures," agencies should look into U.S. EPA climate-related partnership programs that provide a wide variety of services and resources to measure and reduce GHG emissions. These programs include:

Regulations for Emissions from Vehicles and Engines

Contact Us About Regulations for Emissions from Vehicles and Engines
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Last updated on March 20, 2025