UNESCO-IHP IIWQ World Water Quality Portal

World’s first global water quality portal built to support UNESCO Program


UNESCO, through its International Initiative on Water Quality (IIWQ) has published the first comprehensive global water quality atlas for freshwater systems such as lakes and rivers as well as coastal regions. The information is derived from satellite-based Earth observation data and made freely accessible through the IIWQ World Water Portal, run by EOMAP’s Water Quality Monitoring Services on behalf of the International Hydrological Programme (IHP).

The portal is a web application accessible from desktop computers as well as mobile devices. It is part of EOMAP’s next-generation product range, delivering innovation through Earth observation data solutions for businesses and governmental agencies around the world.

Users can view water quality measures such as turbidity, suspended matter, chlorophyll-a or harmful algae blooms, and export reports for user-defined water bodies and parameters. Environmental managers, politicians and scientists can import the service directly into their geospatial information systems for analysis and assessments. Training materials are provided within the IIWQ portal.

In this first version of the portal, a merged set of these parameters is provided at 90 m resolution covering most of the world. Time series products for the year 2016 are provided at 30 m resolution for selected regions of each continent. This can be continued for every country and, for historical views, even up to 30 years back in time. With this technology, various temporal and spatial resolutions with accuracies down to a few metres are supported by using a number of different satellite sensors with physics-based analysis technologies.





Project Type

Worldwide Water Quality Pilot Project


Water Quality, UNESCO, IIWQ, IHQ