27 de December de 2023

Redacció

The stations belonging to the Atmospheric Pollution Monitoring and Forecast Network have recorded a drop in levels of particulate matter (PM10), allowing the warning to be deactivated.

Given the favourable evolution of the weather conditions since the pollution episode was declared on Tuesday 18 January, the Government of Catalonia's Directorate General for Environmental Quality has deactivated measures in place for high levels of PM10 as of 24 December.

The Government of Catalonia’s Directorate General for Environmental Quality has deactivated measures in place for high levels of PM₁₀ in the Barcelona area, as of  24 December.

Levels of PM₁₀ dropped yesterday at the stations belonging to the Atmospheric Pollution Monitoring and Forecast Network (XVPCA), and weather forecasts are favourable.

Municipal operation deactivated

Now that the level of pollutants in the air has dropped, Barcelona deactivated a series of temporary measures on 24 December, provided for under the action protocol for high levels of atmospheric pollution for the duration of the episode. These measures were as follows:

• Watering parks and unpaved squares.
• Increased water of streets with ground water.
• Ban on use of air-sweepers for cleaning tasks and in green areas.
• Ban on dusty work activities.

What are PM₁₀ and where do they come from?

Suspended particles under 10 microns in size are small solid or liquid particles that float in the air. Up to 40% of these particles are generated by vehicle engines, tyres and brakes. The rest comes from dust from public works and demolitions and possibly even Saharan dust clouds.