Preventative warning stage for nitrogen oxide pollution deactivated 23/06/2018

As of Saturday 23 June the Government of Catalonia’s Directorate-General for Environmental Quality and Climate has deactivated the preventative warning stage for high levels of nitrogen oxide in the Barcelona area.

23/06/2018 08:50 h

Ajuntament de Barcelona

UPDATE 23/06/2018: Deactivation of preventative warning stage for NO2 pollution protocol as levels fall.

The Air Pollution Monitoring and Forecasting Network in Catalonia (XVPCA) recorded levels of nitrogen dioxide on 22 June exceeding 160 micrograms per cubic metre in the Barcelona area, leading to the preventative warning. Given the improvement in pollution levels, the warning has now been deactivated.

What is nitrogen oxide and where does it come from?

Nitrogen oxide (NO2) is an irritant gas, reddish brown in colour and with an acrid smell. It is generated by combustion (heating, vehicles and ships). It is estimated that up to 60% of it comes from traffic.

Recommendations to improve air quality

Although the warning has now been deactivated, people are advised to carry on following these recommendations to avoid high pollution levels:

  • Get around on foot or by bicycle, making use of streets with lower volumes of traffic.
  • Use public transport instead of private vehicles.
  • If you have no other option, share cars or combine their use with public transport.
  • Adjust home heating or cooling systems to avoid excesses and ventilate homes at times when there is less traffic in the streets.



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