Revision of Tier 4 Phase-in Schedule for Light-Duty and Medium-Duty Vehicles

Activity

Environmental Protection Network (EPN) filed 2 comments on this docket between Jun 2, 2026 and Jul 7, 2026. 34 other organizations filed here. The comment window closed 22d ago.

What Environmental Protection Network (EPN) filed (2)

Abstract

The U.S. Environmental Protection Agency (EPA) is proposing to extend the Tier 3 criteria pollutant standards for vehicles up to 6,000 pounds gross vehicle weight rating into model years (MYs) 2027 and 2028, and to delay the start of the phase-in of the Tier 4 criteria pollutant standards until MY 2029.

• Environmental Protection Network (EPN)THIS ORG

  2 filings · confidence 97%
• Natural Resources Defense Council (NRDC)trade assoc.

  7 filings · confidence 97%
• International Council on Clean Transportationtrade assoc.

  4 filings · confidence 85%
• Alliance for Automotive Innovationtrade assoc.

  3 filings · confidence 97%
• Manufacturers of Emission Controls Associationtrade assoc.

  3 filings · confidence 85%
• Big Creek Motorsports LLCunverified attribution

  2 filings · confidence 70%
• Mass comment campaign sponsored by National Religious Partnership for the Environmenttrade assoc.

  2 filings · confidence 85%
• Alliance for Clean Vehicle Technologytrade assoc.

  1 filing · confidence 85%
• Alliance of Nurses for Healthy Environmentstrade assoc.

  1 filing · confidence 85%
• American Consumer Institutetrade assoc.

  1 filing · confidence 85%
• American Enterprise Institutetrade assoc.

  1 filing · confidence 85%
• American Petroleum Institutetrade assoc.

  1 filing · confidence 97%
• CZV Inc.unverified attribution

  1 filing · confidence 70%
• Damstrong LLCunverified attribution

  1 filing · confidence 70%
• Environmental Defense Fundtrade assoc.

  1 filing · confidence 97%
• FCA US LLC (a subsidiary of Stellantis N.V.)unverified attribution

  1 filing · confidence 70%
• Ford Motor Companyunverified attribution

  1 filing · confidence 70%
• General Motors LLCunverified attribution

  1 filing · confidence 70%
• Ingevity Corporationunverified attribution

  1 filing · confidence 70%
• Institute for Policy Integrity at New York University School of Lawtrade assoc.

  1 filing · confidence 85%
• Kia Corporationunverified attribution

  1 filing · confidence 70%
• Mass comment campaign sponsored by American Lung Associationtrade assoc.

  1 filing · confidence 85%
• National Association of Clean Air Agenciestrade assoc.

  1 filing · confidence 85%
• National Association of Manufacturers (NAM)trade assoc.

  1 filing · confidence 97%
• National Automobile Dealers Associationtrade assoc.

  1 filing · confidence 97%
• National Parks Conservation Associationtrade assoc.

  1 filing · confidence 85%
• Performance Parts Group LLCunverified attribution

  1 filing · confidence 70%
• Prime Mover Institutetrade assoc.

  1 filing · confidence 85%
• Southern Environmental Law Center (SELC)

  1 filing · confidence 97%
• The Vehicle Suppliers Associationtrade assoc.

  1 filing · confidence 85%
• Truck and Engine Manufacturers Associationtrade assoc.

  1 filing · confidence 85%
• U-Haul Holding Companyunverified attribution

  1 filing · confidence 70%
• U.S. Chamber of Commerce

  1 filing · confidence 97%
• Union of Concerned Scientistsunverified attribution

  1 filing · confidence 70%
• Zero Emission Transportation Associationtrade assoc.

  1 filing · confidence 85%