Air Quality And Emissions To Air Report 2003

Summary: An overview of ambient air quality in 2003 and air emissions trends between 1990 and 2003. Examines the state of ambient air quality in Ireland by comparing measured concentrations with current and future air quality standards for a suite of air pollutants.

Published: 2005

ISBN: 1-84095-147-8

Pages: 57

Filesize: 1,709KB

Format: pdf

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Executive Summary

The first part of the report examines the state of ambient air quality in Ireland by comparing measured concentrations with current and future air quality standards for a suite of air pollutants. These new standards set down in the Air Quality Standards Regulations 2002 (DELG, 2002), correspond to limit values laid down in a number of recent EC Directives and begin to take effect from 2005. Monitoring data of pollutant concentrations is necessary to determine compliance with the standards and to formulate strategies to reduce concentrations. Monitoring programmes are also used to assess the impact of measures implemented.

 The monitoring of daily average smoke and sulphur dioxide (SO2) concentrations was conducted at approximately 30 stations in 2003. The smoke and SO2 results in the 2003/2004 monitoring period were again very low at all stations. The levels were compliant with the Irish air quality standards at those stations having the required level of data capture for compliance assessment. This has been the situation in respect of these two parameters for many years following the successful implementation of emission control measures. A statistical analysis of continuous SO2 data obtained from fixed sites and from EPA managed mobile monitoring stations in 2003 indicates that concentrations overall are very low relative to the hourly and daily limit values defined in 1999/30/EC (CEC, 1999).

PM10 particulate matter was measured at a total of 13 monitoring stations in 2003. All sites used for the purpose of assessing compliance with EU Directive 1999/30/EC (CEC, 1999) were within the 2003 daily limit value, which permitted no more than 35 exceedances above 60 ug/m3. The 50 ug/m3daily limit value applicable from January 1st 2005 was exceeded at Coleraine Street in Dublin on more than the permitted 35 days. Annual mean PM10 levels greater than 25 ug/m3were recorded at stations in Dublin, Cork and Galway. The concentrations, although significant, were below the annual mean limit value of 40 ug/m3 that applies from 2005. Furthermore, secondstage PM10 limits, that will take effect from 2010, will permit only seven daily average concentrations in excess of 50 ug/m3while the annual mean limit will be reduced to 20 ug/m3. The College Street site in Dublin showed elevated levels but the site does not comply with siting specifications in 1999/30/EC. Nonetheless, its data is valuable as it provides the longest time-series of ambient air quality data in Dublin, predating the introduction of the recent EU Directive.

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