​​​​​​​​​​​​​​​​​​​​​​​​​​​The Tellus survey is a national programme to gather geochemical and geophysical data across Ireland – in other words, to examine the chemical and physical properties of our soil, rocks and water.

Tellus is undertaken by Geological Survey Ireland and is funded by the Department of Communications, Climate Action and Environment. All data from Tellus is made available free of charge online.

Tellus involves two types of surveying – airborne geophysical surveying using a low-flying aircraft and ground-based geochemical surveying of soil, stream water and stream sediment.

To date, Tellus surveying has been completed in Northern Ireland (2004–2008) and the border region of Ireland (2011–2013). Tellus airborne surveying has been completed in the north midlands region of Ireland (2014–2015), the eastern midlands region (2015), the west of Ireland (2016–2017) across counties Limerick, north Tipperary and west Cork (2018–​2019) and most recencelty in south east Ireland (2019). The Tellus airborne geophysical survey has now mapped 60% of the country.​

Tellus has established a Product Development workstream in order to produce more focused, user-centric data products, the need for which has been identified through stakeholder consultation, independent reviews of Tellus and government policy.   Product development is undertaken under five main themes: mineral pro​spe​ctivity, smart agriculture, environment and health, climate action and education.

Tellus collects geochemical and geophysical data that will inform the management of Ireland’s environment and natural resources.

Tellus undertakes research with a range of collaborators in order to maximise the societal and economic benefits of the geochemical and geophysical data. Explore the themes to see how Tellus​ data is being used to benefit society.’s-southeast.aspxNew geophysical data released by Tellus Survey· New airborne geophysical data for the southeast region remaps geology · New electromagnetic inversion data for Limerick area shows 3D structure · New online photo portal showing highlights of Tellus survey · Results to be revealed at Irish Geological research Meeting in Athlone · Data made freely available to all online 27/02/2020 00:00:00·New-online-photo-portal-showing-highlights-of-Tellus-survey-.aspxTales from Tellus Story MapNew online photo portal showing highlights of Tellus survey27/02/2020 00:00:00 Characterization and Geochemically Appropriate Levels for Soil Recovery Facilities27/02/2020 00:00:00 Geochemical Soil Sampling Campaign 2019 16/12/2019 00:00:00