ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Air Quality in Wales (airquality.gov.wales)
Note that the measurements for PM2.5 (fine particulate matter) and PM10 (respirable particulate matter) are taken from the station: Swansea Roadside and the measurement for NO2 (nitrogen dioxide) are taken from the station: UK:Wales/Swansea Cwm Level Park