If you see a lorry, bus or taxi that has more than a usual amount of exhaust smoke, please complete the online form.
Please be prepared to give us your own details as we do not accept anonymous reports - this is to prevent malicious or prank reports which waste time and money.
We will pass on details of the offending vehicle to the vehicle and operator services agency (VOSA) or our own team.
VOSA will contact the vehicle operator and investigate the report.
The Council will make a similar response for Hackney cabs (black cabs) and private hire vehicles.