Last updated: 11:00 on Monday 20th September 2021
Number of monitoring sites in each pollution index. Values are based on the pollution level measured for the latest hour and are provisional.
Air Quality in Wales
This website provides information on air quality in Wales. This includes data from the regions monitoring sites, and information on related air quality issues.
Due to the current coronavirus (COVID-19) pandemic please follow the Welsh Government's stay at home guidance. More information on this guidance can be found at: https://gov.wales/staying-home-and-away-others-guidance
During the COVID-19 pandemic the Welsh National and Local Government will be working to ensure that the usual displays of up-to-date information on the air quality across Wales is maintained on this website as far as possible. There may however be disruptions to the availability of data at some locations. We are working to ensure that this is kept to a minimum so that this important public information service continues unimpaired.