Noise Mapping Data

A strategic noise map is designed to assess noise exposure in a given area, resulting from particular noise sources for major roads, major rail, major airports & agglomerations (Dublin, Cork and Limerick). A noise map is a graphical representation of the noise in a particular area. Different colours represent different noise levels in decibels [dB(A)]. The outputs of the Round 4 noise mapping exercise were generated using a new common noise assessment method for Europe (CNOSSOS-EU), as set out in the revised Annex II of Directive 2002/49/EC. They are not directly comparable to any strategic noise maps previously generated under Rounds 1 to 3, as these revised methods calculate noise emissions, propagation and residential population exposure differently from the methods used in earlier rounds.

How to access noise mapping data

The data represented at Reportnet 3 ( and the information on EPA Maps, is largely based on 2021 traffic data for roads, rail, and airports, as well as for the agglomerations (Dublin, Cork and Limerick).

If viewing at Reportnet 3 ( select Legal instrument Noise (filer) for download.

Otherwise, view Noise GIS data for Round 4 (2021) on EPA Maps. Find it under the Environment & Wellbeing - Noise. Expand the Noise Group.

  • Select the dataset you’re interested in using the slider button (e.g. Noise Round 4 Road – Day). It may take a minute to load initially.
  • Expand the Table of Contents on the left-hand side to view the legend.
  • Query the data by single clicking on the area you’re interested in.
  • An information section and Full Metadata sets (i) are available on each of the maps.

Learn more

View more information on environmental noise at using the search option.

A number of technical advice and guidance notes have been developed by the EPA to assist with noise mapping and action planning.