The above index is for overall Air Quality in Zone C 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 C.
The Drogheda site was located in the car park of the Council Buildings in the town centre. Monitoring was done by 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.
Results were collected from 19/2/2002 to 3/1/2003 and compared with the assessment thresholds in the Air Quality Regulations to determine the long term monitoring necessary.
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