​​​​​​​​​​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 the 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), and most recently the west of Ireland (2016-2017). The Tellus airborne geophysical survey has now mapped 50% of the country.

For 2018, plans are underway which will see the Tellus aircraft extend its surveying activities into counties Limerick and north Tipperary as well as west Cork, due to commence early August 2018. Details of plans for the geochemistry survey for 2018 will follow soon.​

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 prospe​ctivity, smart agriculture, environment and health, climate action and education.

Find out more about our ground and airborne field operations and view our data products.

The airborne survey is due to commence in early August 2018.  ​Details of plans for the geochemistry survey for 2018 will follow soon.​​

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. Soil Launched5 year, €1M research project to provide valuable agri-environmental soil data for Ireland’s agricultural sector. New project brings together GSI and Teagasc expertise to help improve management of nutrients and trace elements in soil. 18/09/2018 23:00:00 Geochemical Drainage Sampling for the Tellus Programme 2018-2020RFT: Geochemical Drainage Sampling for the Tellus Programme 2018-202027/08/2018 23:00:00 Notes06/09/2018 23:00:00 Geochemical Survey Contractor Report 2017/2018 27/08/2018 23:00:00