Clean Air Zones England

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What are Clean Air Zones (CAZ)?

A CAZ is an area within a city where a local authority has brought measures into place to improve the air quality.

Cities with clean air zones

Bath has a Class C clean air zone.
Birmingham has a Class D clean air zone.
Bradford has a Class C clean air zone.
Bristol has a Class D clean air zone.
Portsmouth has a Class B clean air zone.
Sheffield has a Class C clean air zone.
Tyneside (Newcastle and Gateshead) has a Class C clean air zone.

Future clean air zones

Greater Manchester (under review).

Learn more about Low Emission Zones in Scotland

Types of clean air zones

There are 4 types of clean air zones, Class A to D.

Class	Vehicle Type
A	Buses, coaches, taxis, private hire vehicles
B	Buses, coaches, taxis, private hire vehicles, heavy goods vehicles
C	Buses, coaches, taxis, private hire vehicles, heavy goods vehicles, vans, minibuses
D	Buses, coaches, taxis, private hire vehicles, heavy goods vehicles, vans, minibuses, cars, the local authority has the option to include motorcycles

Minimum emission standards

Each vehicle type has a minimum emission standard. You can find your vehicle’s emission standard in your vehicle log book or from your vehicle manufacturer.

To avoid being charged in a clean air zone, your vehicle must meet the following minimum standard:

Vehicle type	Clean air zone minimum standard
Buses, coaches, heavy goods vehicles	Euro VI
Vans, minibuses, taxis, private hire vehicles, cars	Euro 6 (diesel) and Euro 4 (petrol)
Motorcycles	Euro 3

Local authorities may set a different standard for taxis and private hire vehicles. You can find out if you will be charged by inputting your vehicle registration details into the Government vehicle checker.