ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Sistema Nacional de Calidad del Aire en Chile (sinca.mma.gob.cl)
Note that the measurements for O3 (ozone), CO (carbon monoxide) and NO2 (nitrogen dioxide) are taken from the station: CL:registrostable/Parque O'Higgins and the measurement for SO2 (sulfur dioxide) are taken from the station: Parque O'Higgins