The area around Heuston Station was the worst offender.
Illegal levels of air pollution have been detected in Ireland for the first time in over a decade.
A site near Heuston Station in Dublin was over the European limit for nitrogen dioxide because of high levels of traffic nearby.
Unhealthy levels of airborne dust and soot were also found at 33 sites across the country.
They're linked to around 1,300 premature deaths in Ireland every year.
Patrick Kenny, EPA Air Quality Manager says more people will die from air pollution this year than Covid-19:
