Key Indicators of Ambient Air Quality.
Summary: Summary of ambient air quality in 2018 based on concentration measurements of particulate matter, sulphur dioxide, nitrogen oxides, heavy metals, ozone, polycyclic aromatic hydrocarbons, carbon monoxide and benzene.
Air Quality :: Environmental Protection Agency, Ireland
https://www.epa.ie/media/epa-2020/compliance-amp-enforcement/air/AQ-2018.jpg