ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Air Pays de la Loire (airpl.org)
Note that the measurement for O3 (ozone) are taken from the station: Frossay, la Basse-Loire, Loire and the measurement for CO (carbon monoxide) are taken from the station: S Etienne de Montluc, la Basse-Loire, Loire