<div>Australia is the driest inhabited continent on Earth and groundwater is crucial to maintaining the country’s population, economic activities, Indigenous culture and environmental values. Geoscience Australia is renewing a national-scale focus to tackle hydrogeological challenges by building upon our historic legacy in groundwater studies at regional and national scales.</div><div><br></div><div>The most comprehensive hydrogeological coverage of the nation is the 1987 Hydrogeology of Australia map, developed by a predecessor of Geoscience Australia. This map provides an overview of groundwater systems and principal aquifers across Australia, based upon the large sedimentary basins, intervening fractured rock areas and smaller overlying sedimentary/volcanic aquifers. However, the currency and completeness of the information presented and accompanying the national hydrogeology map needs to be improved. Updating the extents, data and scientific understanding of the hydrogeological regions across Australia, and improving the accessibility and useability of this information will address many of its current limitations.</div><div><br></div><div>Geoscience Australia, within its Exploring for the Future program, is compiling hydrogeological and related contextual information clearly and consistently across Australia’s major sedimentary basins and intervening fractured rock provinces. This information has been collected for 41 major hydrogeological regions spanning the continent: 36 sedimentary basins and 5 regions dominated by fractured-rock aquifers. The information, collected through a combination of geospatial analyses of national datasets and high-level summaries of scientific literature, will be presented through Geoscience Australia’s online data discovery portal, thereby enabling improved interrogation and integration with other web mapping services.</div><div><br></div><div>The new compilation of nationally consistent groundwater data and information will help to prioritise future investment for new groundwater research in specific regions or basins, inform the work programs of Geoscience Australia and influence the prioritisation of national hydrogeological research more broadly.&nbsp;</div><div><br></div>This Abstract was submitted/presented to the 2022 Australasian Groundwater Conference 21-23 November (https://agc2022.com.au/)

<b>This service will be decommissioned on 26/04/2024. The replacement service with existing data is located at https://services.ga.gov.au/gis/integrated-products/rapid_inventory/ows.</b> The National Hydrogeological Inventory web service provides access to the compilation of thematic summaries of 42 Australian Groundwater Provinces. These consistently compiled 42 summaries comprise the National Hydrogeological Inventory.