The above index is for overall Air Quality in Zone A and not just at this station. The index is calculated based on the latest available measurements of ozone, nitrogen dioxide, PM10 and sulphur dioxide in Zone A.
The Pearse Street site was at the junction of Pearse Street and Westland Row, inside the grounds of Trinity College.
Monitoring was done using a mobile unit containing continuous monitors for sulphur dioxide, nitrogen oxides, carbon monoxide and benzene. Continuous samples were also taken for particulates (PM10) and lead.
Measurements were carried out from 16/07/1999 to 15/12/1999 and 06/04/2000 to 13/07/2000. The results were compared with the assessment thresholds in the Air Quality Regulations to determine the long term monitoring necessary.
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