Clean Trucking

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The State of Colorado is exploring a variety of ways to reduce emissions from Medium- and Heavy-Duty (M/HD) vehicles. 

Clean Trucks (photo courtesy Colorado Clean Truck Strategy)

The Air Pollution Control Division held two public listening sessions to gather public input on Colorado's Clean Truck rules, which were proposed to the Air Quality Control Commission (AQCC) in December, 2022. The rulemaking hearing before the AQCC will be in April, 2023. 

To stay up-to-date on the Clean Truck rulemaking process or provide written comments to the AQCC, email cdphe.aqcc-comments@state.co.us

Public Listening Session #1

September 7, 2022

Public Listening Session #2

October 22, 2022

Past Public Informational Sessions:

Traffic is an Equity Issue:
How Traffic Harms Certain Communities More than Others and How Clean Trucking Policies Can Help. 
Dr. James Crooks is a scientist at National Jewish Health in Denver, where he researches how air quality and climate extremes affect human health. 
June 29, 2022

LEV, ZEV - What Does It All Mean?
An Introduction to the Different Types of Zero-Emission Vehicle Technologies and Hope they Offer For the Climate Crisis
May 12, 2022

Cleaner Trucks are Vital for Better Air and the Climate:
An Introduction to the Basics of the Colorado Clean Trucking Strategy and Why You Should Care
April 14, 2022

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Proposed Clean Truck Rulemaking (2022-2023) 

To address climate change and improve Colorado’s air quality, the Air Pollution Control Division proposed the following rules to the Colorado Air Quality Control Commission (AQCC).

  • The Advanced Clean Trucks (ACT) rule would require manufacturers of medium and heavy-duty on-road vehicles to sell an increasing percentage of zero-emission vehicles of their annual sales from model year 2027 and beyond. This would reduce greenhouse gas emissions and other air pollutants.
  • The Low NOx Truck rule would require heavy-duty vehicle manufacturers to make cleaner vehicles, improve how they test vehicle engines, and extend engine warranties. Nitrogen Oxides are a family of poisonous, highly reactive gases that are formed when fuel is burned at high temperatures from cars, trucks, buses, power plants and more. This rule would reduce NOx emissions per new vehicle sold by 90% below current standards starting in model year 2027 - providing significant public health benefits.

If adopted in calendar year 2023, these rules would take effect in calendar year 2026, and apply to new vehicles model year 2027 and later.

FACT SHEET: Colorado Clean Truck Rules 

Reg 20 Proposed Draft Rule Language 11.15.2022

  • The Colorado Clean Truck rules will go before the Air Quality Control Commission (AQCC) April 19-21, 2023.
  • Rulemaking hearings are always open to the public. The registration link is available on the Air Quality Control Commission's agenda on the AQCC website two weeks prior to the meeting.
  • If you wish to submit written comments about the Clean Truck Rules, please email them to the Air Quality Control Commission at cdphe.aqcc-comments@state.co.us.  
  • Any questions about the rulemaking hearing should be directed to the Air Quality Control Commission. Contact information is provided on the Commission's website.

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