Federal Fleets using Low-Greenhouse Gas Emitting Vehicles

• Overview
• How do we define a low-GHG emitting vehicle?
• What vehicles are considered low GHG-emitting?
• What are the compliance levels by agency/office?
• Guidance document and other resources

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)

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

• Model Year 2024 (xlsx) (678.73 KB, May 2024)
• Model Year 2023 (xlsx) (663.78 KB, July 2023)
• Model Year 2022 (xlsx) (662.99 KB, June 2022)

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.**

*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

• Guidance for Implementing Section 141 of the Energy Independence and Security Act of 2007: Federal Vehicle Fleets and Low Greenhouse Gas-Emitting Vehicles (pdf) (June 2022, EPA-420-B-22-029)
• Earlier versions of the guidance document can be found by searching the following database:
  Simple Search in NSCEP

GHG Assessment Tool

• June 2020 version: EISA Sect. 141 Vehicle GHG Assessment Tool Final (xlsx)
• October 2019 version: EISA Sect. 141 Vehicle GHG Assessment Tool Final (xlsx)
• June 2019 version: EISA Sect. 141 Vehicle GHG Assessment Tool Final (xlsx)

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

Help with "Alternative Measures"

• SmartWay Transport Partnership
• Landfill Methane Outreach Program
• EnergyStar
• Green Power Partnership
• Combined Heat and Power Partnership