Air Pollution

Pollution Under Control (PUC) Test

Note4Students

From UPSC perspective, the following things are important :

Prelims level : PUC Test

Mains level : Combating urban air pollution


  • Since the Motor Vehicles (Amendment) Act, 2019 came into force, long queues of vehicles are commonly being seen at pollution control centres in Delhi.
  • After undergoing pollution under control (PUC) test, a vehicle is certified for a certain period of time.

What is a PUC certificate?

  • The PUC certificate is a document that any person driving a motor vehicle can be asked to produce by a police officer in uniform authorised by the state government.
  • These issue certificates if a vehicle is found complying with the prescribed emission norms.
  • The fine for PUC violations has now gone up to Rs 10,000; it used to be Rs 1,000 for the first offence and Rs 2,000 for subsequent violations before the amendments came into force.
  • The test costs between Rs 60 and Rs 100.
  • The validity of the test is one year for BS IV vehicles and three months for others.
  • A PUC certificate contains information such as the vehicle’s license plate number, PUC test reading, date on which the PUC test was conducted and the expiry date.

How is a pollution control check carried out?

  • The computerised model for pollution check was developed by the Society of Indian Automobile manufacturers.
  • A gas analyser is connected to a computer, to which a camera and a printer are attached.
  • The gas analyser records the emission value and sends it to the computer directly, while the camera captures the license plate of the vehicle.
  • Subsequently, a certificate may be issued if the emission values are within the limits.

Why PUC?

  • According to the Transport Department, Delhi, 217.7 tonnes of carbon monoxide is emitted every day by vehicles in the city.
  • Vehicular pollution estimates include 84.1 tonnes of nitrogen oxides and 66.7 tonnes of hydrocarbons per day.
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