Air Quality In Ireland 2005

Key indicators of ambient air quality

Summary: Ambient air quality trends based on concentration measurements of particulate matter, sulphur dioxide, nitrogen oxides, black smoke, lead, ozone, carbon monoxide and benzene. This is a revised version from 11 September 2006, correcting an error on page 11 of the report issued in July 2006.

Published: 2006

ISBN:

Pages: 26

Filesize: 1,175KB

Format: pdf

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Executive Summary

Particulate Matter (PM10) concentrations in 2005 were similar to those measured in 2004. All stations were compliant with the standard introduced from 2005 which permits no more than 35 daily values greater than the limit value of 50 ug/m3. There were fewer exceedances of the limit value than in previous years, with all stations recording fewer than 10 values above the limit value. Annual mean concentrations measured at all stations were below the 40 ;g/m3 limit value for annual mean.

Sulphur Dioxide (SO2) concentrations measured in 2005 were very low relative to the limit values. There were no exceedances of either the daily limit value of 125 ;g/m3 or the hourly limit value of 350 ;g/m3 at any station.

Nitrogen Dioxide (NO2) concentrations measured in 2005 were compliant with all limit values. The highest annual mean value of 33 ug/m3 recorded at Winetavern Street in Dublin was within the limit value of 40 ug/m3. There was one exceedance of the hourly limit value which will permit no more than 18 exceedances greater than 200 ug/m3 in a calendar year from 2010 onwards.

Ozone (O3) concentrations measured in Ireland in 2005 were similar to 2004. There were no exceedances of the hourly information threshold of 180 ug/m3 at any of the stations. The 8-hour target value of 120 ug/m3 was reached on 2 days at Valentia and 1 day at Kilkitt, well within the permitted number of 25 days. The AOT40 2020 long-term objective of 6,000 ug/m3hours for the protection of vegetation was not exceeded at any station in 2005.

Lead (Pb) concentrations measured at all stations in 2005 were below the limit value of 0.5 ;g/m3 which came into force on 1st January 2005. Urban lead levels recorded were all less than one-tenth of the limit value.

Carbon Monoxide (CO) concentrations measured at all fixed locations and at a number of additional EPA mobile sites in 2005 were well within the daily 8-hour mean limit of 10 mg/m3. The highest maximum 8-hour carbon monoxide level of 5 mg/m3 was recorded at Coleraine Street in Dublin.

Benzene (C6H6) concentrations measured at all stations in 2005 were well below the limit value of 5 ug/m3 which comes into force in 2010. The highest annual mean value of 1.4 µg/m3 was recorded at Winetavern Street in Dublin.

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