ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Air Quality in Wales (airquality.gov.wales)
Note that the measurement for O3 (ozone) are taken from the station: Port Talbot Margam and the measurements for NO2 (nitrogen dioxide) and SO2 (sulfur dioxide) are taken from the station: Port Talbot Twll-yn-y-Wal Park