UNESCO IHP-WINS Global Groundwater Quality
Global groundwater quality and contamination dataset hosted on UNESCO IHP-WINS (with IGRAC), containing downloadable shapefiles for arsenic probability, PFAS contamination, and saline/brackish groundwater occurrence in coastal and global aquifers.
ihp-wins.unesco.org
At a glance
- Region
- Global
- Coverage
- Global
- Access
- Free
- Category
- UN Organization
- Last updated
- 2025
What's inside
- Groundwater Quality
- Aquifer Contamination
- Shapefile
- GIS
What you can do with it
Typical work that data of this type supports.
- 01
Trend hotspots
Find where water tables are falling year after year.
Because it has: Groundwater Quality
- 02
Recharge planning
Site recharge structures and new borewells with evidence.
- 03
Hotspots and trends
Find where contamination is high and whether it is getting worse.
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Gap filling
Rebuild missing well readings from neighbours, rainfall and season.
- 02
Level forecasts
Forecast pre- and post-monsoon levels well by well.
- 03
Risk maps
Predict contamination where no samples exist, from geology, land use and climate.
Machine access and documentation
Open API
CKAN dataset API + direct shapefile download
Licence: Open data
Listed in our registry of open water APIs, which WaterDataGPT can query live.
Related water data
- Global Aquifer Properties with Recharge (OSTI 2484226)Global | Free
- Transboundary Aquifers of the World Map 2025 (IHP-WINS)Global | Free
- Eawag Global Arsenic in Groundwater DatasetGlobal | Free
- Groundwater Assessment Platform (GAP Maps)Global | Free
- GeoERA Groundwater Resources Map (EGDI Geonetwork)Global | Free
- GLHYMPS - Global Hydrogeology Maps of Permeability and PorosityGlobal | Free
Find more water data
Search and compare 1,900+ water data sources by region, type and access.