🧪 Water Quality

Global Ungauged basins

Aqua MODIS Level-2 Regional Ocean Color Data – Version 2022.0

A global NASA Aqua MODIS ocean-colour collection providing approximately 1-kilometre swath observations of chlorophyll-a, remote-sensing reflectance, diffuse light attenuation, fluorescence, photosynthetically…

Provider National Aeronautics and Space Administration – Ocean Biology Processing Group

Resolution Approximately 1 kilometre at nadir Geolocated Level-2 satellite swath pixels rather than a regularly mapped global grid Pixel size becomes larger toward the outer edge of the satellite swath

Ungauged basins

Digital Earth Africa Water Quality Monitoring Service

A continental satellite-based service providing annual chlorophyll-a, trophic state, suspended matter, water colour, optical water type, floating algae, surface vegetation and water-temperature indicators for…

Provider Digital Earth Africa_2

Resolution 10-metre product grid in EPSG:6933. Pixel-based raster indicators are accompanied by annual summary statistics for individual waterbody polygons.

Global

GEMStat Global Freshwater Quality Database

UNEP’s global database of field-measured freshwater-quality observations from rivers, lakes, reservoirs, wetlands and groundwater. Its open archive contains more than 50 million measurements for 622 parameters…

Provider United Nations Environment Programme – Global Environment Monitoring System for Freshwater

Resolution Point-based observations at individual monitoring stations; the open archive contains 22,982 stations and the complete GEMStat database contains more than 31,000 stations. This is not a regularly gridded dataset.

Global

Global Ocean Colour (Copernicus-GlobColour), Bio-Geochemical, Level-3 Daily Satellite Observations, 1997–Ongoing

A daily global Level-3 ocean-colour product providing chlorophyll-a, phytoplankton functional groups, suspended particulate matter, Secchi depth, diffuse attenuation, coloured dissolved matter, particulate bac…

Provider European Union Copernicus Marine Service

Resolution Principal global multi-sensor datasets: approximately 4 km × 4 km Selected Sentinel-3 OLCI-only chlorophyll-a and remote-sensing-reflectance datasets: 300 m and 4 km Global mapped grid using WGS 84 / Plate Carrée

Nile Basin Water Quality Database

A centralised regional database containing almost 45,000 physicochemical analyses contributed by Nile Basin countries from national water-quality monitoring campaigns and continuous monitoring activities.

Provider Nile Basin Initiative

Resolution Point-based observations at water-quality monitoring and sampling locations This is not a regular gridded dataset. Station density and geographic coverage vary among countries and water bodies.

Ungauged basins

SADC Groundwater Information Portal

A regional map-based portal providing hundreds of groundwater and hydrogeological datasets, maps and documents for Southern Africa, including groundwater monitoring, boreholes, aquifers and groundwater-quality…

Provider Southern African Development Community Groundwater Management Institute

Resolution Mixed spatial resolution depending on the selected resource Regional and national hydrogeological maps Aquifer and transboundary-aquifer polygons Point-based borehole, monitoring-station and sampling-location data Ri

Global

The United Nations Children’s Fund Multiple Indicator Cluster Surveys Programme, commonly known as UNICEF MICS, is a global household-survey programme that helps countries produce reliable, nationally representative and internationally comp

A collection of anonymised country-level MICS survey datasets containing household drinking-water information and, in participating surveys, direct E. coli testing at the household point of consumption and pri…

Provider United Nations Children’s Fund – Multiple Indicator Cluster Surveys Programme

Resolution Household-level anonymised survey observations with national or subnational statistical representation Public microdata commonly include administrative region, urban or rural residence and sampling-cluster identifiers.

Global

WHO/UNICEF JMP Global Household Drinking Water, Sanitation and Hygiene Estimates, 2000–2024

The WHO/UNICEF Joint Monitoring Programme Global Household Drinking Water, Sanitation and Hygiene Estimates dataset is the principal international database used to monitor household access to drinking water, s…

Provider World Health Organization and United Nations Children’s Fund Joint Monitoring Programme for Water Supply, Sanitation and Hygiene

Resolution Country-level, urban, rural, regional and global statistical estimates Selected countries also include subnational-region and inequality estimates where suitable source data are available. This is not a point-monitorin

Global Ungauged basins

Copernicus Lake Water Quality Global 300 m, 10-Daily – Version 2

A validated global satellite product providing chlorophyll-a, turbidity, total suspended matter, trophic state, floating-cyanobacteria probability, water-leaving reflectance, quality flags and uncertainty info…

Provider Copernicus Land Monitoring Service

Resolution 300 metres Regular latitude–longitude raster grid in EPSG:4326