ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Northern Ireland Air (airqualityni.co.uk)
Note that the measurement for O3 (ozone) are taken from the station: Derry Brooke Park and the measurement for NO2 (nitrogen dioxide) are taken from the station: Derry Rosemount