ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ Atmo en Hauts-de-France - Pas-de-Calais (atmo-hdf.fr)
Note that the measurements for O3 (ozone), NO2 (nitrogen dioxide) and SO2 (sulfur dioxide) are taken from the station: mer-cheminot, St Pol, Nord-Pas-de-Calais and the measurement for CO (carbon monoxide) are taken from the station: Cappelle-la-grande, Nord-Pas-de-Calais