Air quality automatic and non-automatic monitoring in Northern Ireland is currently a mixture of that carried out by the Department and that undertaken by district councils. Air Quality reports for NI for 2004 to 2010 can be found here. 
The most recent Air Quality monitoring report for 2010 can be downloaded from the Air Quality Monitoring Report 2010 (2,111 KB) 
The Department has a multi-pollutant station in Lombard St in Belfast (see photo below), as well as ozone and particulate (PM10) monitors at a rural site at Lough Navar in Co. Fermanagh.
The multi-pollutant automatic site located in Lombard Street in Belfast monitors sulphur dioxide, carbon monoxide, ozone, nitrogen oxides and particulates (PM10 and PM2.5). It also monitors particulate carbon, benzene and heavy metals. More details on the site can be obtained from the Environmental Protection department of Belfast City Council who maintain the site.
Tel No: (028) 90 270 428 or e-mail: envhealth@belfastcity.gov.uk
Monitoring of poly-aromatic hydrocarbons (PaHs), now takes place in Lisburn, Derry, and Ballymena.
In addition to the Department's sites, several councils are currently involved in a national non-automatic nitrogen dioxide diffusion tube monitoring network, which commenced in 1993. Further details can be found here.
In additon, black smoke is measured at locations in Strabane and Dunmurry as part of a national network. Further details can be found here.
A multi-pollutant site, similar to the Department's Belfast site, has been operated by Derry City Council since 1997 at Brooke Park.
Data from these sites is widely available through their integration into the national government networks which provide for quality assurance and quality control of the data as well as analysis and comparison in a national context.
Additional new sites have been commissioned by district councils. These sites have been funded by the Departments' local air quality grant scheme and have been used to collate data necessary for the review and assessment of local air quality. Air quality information from all these sites is available here. 
Should you require further information, please feel free to contact the Air and Environmental Quality Team at:
Air and Environmental Quality Team
Department of the Environment
Goodwood House
44 - 58 May Street
Belfast BT1 4NN
E-mail: aeqteam@doeni.gov.uk
Tel.: (028) 90 254 758
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