Dublin has the worst quality of air in the country, according to the Environmental Protection Agency (EPA).
The air quality in the capital is located in the 'fair' region between 'good' and 'fair' on the air quality index.
EPA have advised that: "Those with lung and heart problems should consider reducing strenuous activity, particularly outdoors."
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It comes as weather in Dublin took a turn for the better, leading to some experiencing symptoms of hayfever.
The west of Ireland is ranked number three on the index, with some patches around the country having the most desirable quality, one.
Dublin is also the third worst country in the world for time spent in traffic, according to transport data firm INRIX, and traffic congestion is seen as a major contributor to poor air quality in major cities.
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