ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Calidad del Aire | Junta de Castilla y León (jcyl.es)
Note that the measurements for PM2.5 (fine particulate matter) and CO (carbon monoxide) are taken from the station: Palencia III and the measurement for SO2 (sulfur dioxide) are taken from the station: Hontoria I - Poblado, Palencia