ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Calidad del Aire | Junta de Castilla y León (jcyl.es)
Note that the measurement for SO2 (sulfur dioxide) are taken from the station: La rubia II, Valladolid and the measurement for CO (carbon monoxide) are taken from the station: Renault II, Valladolid