IRELAND · LANDSCAPE · WATER
Groundwater Vulnerability
What this layer shows
GSI's groundwater vulnerability map: Extreme to Low, the map that drives site suitability for septic tanks, spreading and discharges across Ireland. 221,148 polygons; draws close in.
Where the data comes from
ARCGIS · gsi.geodata.gov.ie
Merestone asks this service live for the area on screen. Nothing is copied or stored beyond a short cache.
Facts shown for each feature
Class · Description
In these presets
Groundwater & geology
Aquifers, vulnerability, subsoils, bedrock and radon.
Farming
Nutrient planning for Irish farms: where nitrate and phosphorus are most likely to reach water (the EPA's high-rank critical source areas), which agricultural pressure each sub-basin needs work on, groundwater vulnerability, soils, wells and septic-tank risk. Ireland runs a whole-territory Nitrates Action Programme, so risk grades come from these layers rather than from NVZ boundaries.