Clean Air Zone

A Clean Air Zone (CAZ) is an area in the United Kingdom where targeted action is taken to improve air quality. A CAZ can be non-charging or charging.

Whether a vehicle is charged when entering or moving through a CAZ depends on the type of vehicle and the Euro standard of the vehicle. The amount charged is up to the local authority responsible for the CAZ. Ultra-low-emission vehicles are not charged when entering or moving through a Clean Air Zone.

• Greater London has a Low Emission Zone and an Ultra Low Emission Zone, covering the majority of the city
  • In central London there is a Congestion Charge, a different type of charge for motor vehicles
• Oxford has a Zero Emission Zone in the city centre
• Edinburgh, Glasgow, Aberdeen and Dundee each have a Low Emission Zone in their centres

• Nitrogen Dioxide Emissions - Euro 6 vs Older Euro Standard Engines
• Carbon Monoxide Emissions - Euro 6 vs Older Euro Standard Engines