This is a dataset of the air quality zones listed on http://www.epa.ie/air/quality/zones/. The zones were defined initially in the Air Quality Regulations (SI 180 of 2011). The EPA reviews the zones regularly and amends when necessary.
This is a polygon dataset of the regions displayed on the EPA's AQIH Map (http://www.epa.ie/air/quality/#.VbDp-_lViko)
This is a points dataset of the locations of current and past air monitoring sites managed within the EPA's National Ambient Air Quality Network.