Sunday August 14, the air pollution alert goes off on Friday August 12 in the North, Pas-de-Calais and Somme, ends. The onset of cloud cover should limit ozone concentrations.
The organization atmosphere The Hauts-de-France foresee the end of the episode of air pollution by ozone on Sunday August 14 in the departments of Nord, Pas-de-Calais and Somme.
Due to the release of pollutants into the air and high temperatures, the three departments had been on ozone pollution alert since Friday August 12. “The cloud cover that settles in the region limits the production of ozone. Ozone concentrations should remain below the information and recommendations threshold (180µg/m3)“noted atmosphere Hauts de France.
Saturday August 13, no exceeding of the information and recommendations thresholda summer observed in the 3 departments. Thus, the “prefectural alert procedures on persistence Activated Friday on the North, the Pas-de-Calais and the Somme are lifted“, announces the observatory of the air.
Although the alert has been lifted, the air quality remains poor over the northern half of the region, and degraded over the southern half, due to the still high temperatures.
“Monday, August 15, a rainy-stormy degradation should affect the entire region. Ozone concentrations will drop, but air quality remains average to degraded“. However, the concentrations do not exceed the information and recommendation threshold.