All water data sources
Every source in our directory, by country and A-Z. To filter by data type, region or access, use the searchable directory.
By country
A-Z
A
- A comprehensive time-series dataset linked to cyanobacterial blooms in Lake Taihu
- A Comprehensive Water Chemistry Dataset for Iranian Rivers (open-access data paper)
- A continental-scale soil evaporation dataset from SMAP satellite drying rates
- A database of chlorophyll and water chemistry in freshwater lakes
- A database of groundwater wells in the United States
- A dataset of distributed global population and water withdrawal from 1960 to 2020
- A dataset of remote-sensed Forel-Ule Index for global inland waters during 2000-2018
- A dataset of storm surge reconstructions in the Western North Pacific using CNN
- A dataset of trophic state index for nation-scale lakes in China from 40-year Landsat observations
- A Dataset of Water Stable Isotopes in Iran's Main Aquifers (open-access data paper)
- A global daily gap-filled chlorophyll-a dataset in open oceans during 2001-2021
- A global dataset of average specific yield for soils
- A global dataset of surface water and groundwater salinity measurements (1980-2019)
- A global dataset of the national green and blue water footprint of livestock feeds
- A global dataset of the shape of drainage systems (Basin90m)
- A global long-term daily reanalysis of reference evapotranspiration for drought monitoring
- A global multi-catchment synthesis for water fluxes and storage changes
- A global streamflow indices time series dataset for large-sample hydrological analyses (until 2022)
- A Landsat-derived annual inland water clarity dataset of China between 1984 and 2018
- A new dataset of river flood hazard maps for Europe and the Mediterranean Basin
- Abrupt Stream Acidification and Metal Mobilization from Permafrost Degradation (Dryad)
- ACSAD - Arab Center for the Studies of Arid Zones and Dry Lands Water Resources
- ADES French Groundwater Portal
- ADO Alpine Discharge & Water Level Database
- Adventure Scientists Global Microplastics Initiative
- Afghanistan Drought Early Warning Decision Support (AF-DEWS)
- Afghanistan Water Resources Database
- Africa Drought Advisory (ACMAD)
- Africa GeoPortal
- Africa Groundwater Atlas (BGS Earthwise)
- Africa Groundwater Atlas (BGS)
- Africa Groundwater Atlas Country Hydrogeology Maps (NORA/NERC)
- Africa Water Bodies (energydata.info)
- African Flood and Drought Monitor (AFDM)
- African Water Facility
- African Water Information System (AWIS)
- AfriDischarge (IWMI high-resolution African discharge dashboard)
- AfriGIS Weather API (SAWS data feeds)
- Agence du Bassin Hydraulique du Sebou - Data Supply Service
- Agence du Bassin Hydraulique du Sebou (ABHS) - Quantitative Monitoring
- Agence du Bassin Hydraulique du Souss-Massa (ABHSM)
- Agència Catalana de l'Aigua - Real-time Water (ACA)
- AGRHYMET Regional Climate Centre (Sahel)
- Agricultural Water Management Database
- AgWeatherNet (Washington State University)
- AI-KOSH - Status of Water Quality in India Datasets
- AIKosh - Daily Reservoir Level of Central Water Commission (CWC)
- AIKosh - Jal Jeevan Mission / NRDWP Datasets
- AIKosh - Waterbodies and Reservoir Network Dataset (CoRE Stack)
- AIMS eReefs THREDDS Data Server
- AIMS Marine Microplastics Monitoring (Great Barrier Reef)
- airGRdatasets: Hydro-Meteorological Catchments Datasets for airGR (French catchments)
- Akvo - WASH Data Services & Flow
- Alberta Groundwater Observation Well Network (GOWN)
- Alberta River Basins Water Data (Alberta Environment)
- Alberta Water Quality Data Portal (WQD Portal)
- AlertManager
- Algeria National Water Observatory
- Allen Coral Atlas
- Alliance for Water Efficiency Tools
- ALPS Treated Water Marine Monitoring Information (Japan MoE)
- Amazon Water Observatory
- AMCOW Water & Sanitation Monitoring System
- An enhanced rainfall-induced landslide catalogue in Italy (e-ITALICA)
- ANA Brazil Water Information
- Andalusia Reservoir Viewer (datos.gob.es)
- Annual mass change of the world's glaciers from 1976 to 2024
- ANUClimate 2.0 (OneClimate / ACDGuide)
- ANUClimate Gridded Climate for Australia (data.gov.au)
- AODN Portal (Australian Ocean Data Network)
- AOOS Ocean Data Explorer (Alaska Ocean Observing System)
- Apache Kafka
- Apache Mahout
- Apache NiFi
- Apache Spark
- APDRC CPC Global Daily Precipitation
- APDRC GPCP Merged Daily Precipitation v1.1
- APDRC NOAA-CIRES-DOE 20th Century Reanalysis V3
- APHRODITE Asian Daily Precipitation (Hirosaki University)
- APHRODITE Asian Precipitation Gridded Dataset (Hirosaki University)
- APWRIMS Andhra Pradesh
- AquaCrop
- Aquaculture Water Quality Dataset (Mendeley Data)
- AquaMeld River and Lake Wastewater Reuse Water Quality Dataset (Mendeley Data)
- AQUASIM
- AQUASTAT Global Water Information System
- AQUATOX
- Aquaya - WASH Research Data & Resources
- Aqueduct Floods Analyzer (WRI)
- Aqueduct Floods Hazard Maps (WRI S3)
- Aqueduct Water Risk Atlas (WRI)
- Arab Water Council - Arab State of the Water Reports
- Arealdata - Danmarks Miljøportal (Hydrometri og grundvand)
- Argentina INA - National Water Institute (Instituto Nacional del Agua)
- Argentina INA - SIyAH Hydrological Alert System
- Argentina SNIH - National Hydrological Information System
- Argo Float Program
- Arizona Department of Water Resources - GIS Data and Maps
- Arizona Department of Water Resources Open Data
- ARPA Piemonte Rete Meteo-Idrografica
- ARPAE Dext3r - Emilia-Romagna Meteo-Hydrological Data Extraction
- ARPAE Emilia-Romagna Open Data Meteo-Climate & Hydrology
- ARSO Slovenia Water
- ASEAN Specialised Meteorological Centre (ASMC)
- ASI PRISMA Hyperspectral Satellite
- Asian Water Development Outlook
- Atal Bhujal Yojana Portal
- Atlantic DataStream - Atlantic Canada Water Quality
- Atlas of Ocean Microplastics (AOMI)
- Auckland Council Environment Data Portal
- Auckland Council Open Data
- Australia BoM Water Data
- Australia Bureau of Meteorology Drought Monitoring
- Australia Bureau of Meteorology Flood Warnings
- Australian Antarctic Data Centre (AADC)
- Australian Gridded Climate Data (AGCD) Precipitation - Geoscience Australia Portal
- Australian National Environmental Management Plan (NEMP) PFAS Data
- Australian Rainfall Maps and Analysis
- Australian Water Outlook
- Austria Federal Water Engineering
- AVISO+ Satellite Altimetry Products
- avoindata.fi: Finnish National Open Data Portal (Water)
- AWARENET - Arab Countries Water Utilities Association
- AWI Meereisportal CryoSat-2 / Sea-Ice & Snow Data
- AWS NEX-GDDP-CMIP6 Registry
- AWS Open Data Registry - Satellite Imagery
- AWWA Utility Benchmarking Program & Data Products
- AZMET - Arizona Meteorological Network
B
- BAFG German Federal Waterways Hydrological Data
- Bahrain Electricity and Water Authority (EWA)
- Bahrain Open Data Portal - Environment, Electricity & Water Datasets
- Bahrain Open Data Portal - Statistics Reports
- BANDAS - Banco Nacional de Datos de Aguas Superficiales (IMTA)
- Bangladesh Bureau of Statistics - Environment & Water Statistics
- Bangladesh Deltaic Research Center
- Bangladesh Flood Forecasting & Warning Centre (FFWC)
- Bangladesh Hydroinformatics and Flood Forecasting Circle
- Bangladesh Meteorological Department
- Bangladesh Rivers (Watercourses) - HDX
- Bangladesh Water Development Board
- Bangladesh Waterbodies - HDX
- Barcelona Smart Water Grid
- Barragens.pt - Portuguese Dams Information System
- BASINS
- Basque Marine Monitoring Network
- Bathybase: Global Lake Bathymetry Database
- Bathymetry and Hydrology of an Emerging Periglacial Lagoon, Svalbard (Mendeley Data)
- BC Hydro - Reservoir Levels & Hydrometeorologic Data
- BC Water Availability Tool (BCWAT)
- BC Water Resources Atlas (British Columbia)
- BCCAQ Global CMIP6 Dataset
- BCO-DMO ERDDAP (Biological & Chemical Oceanography Data, WHOI)
- BDEW - Profile of the German Water Sector
- BDLISA French Hydrogeological Database
- Beijing Climate Centre
- Belgium Water Research Institute
- BfG German Federal Waterways Data (PEGELONLINE)
- BfG GRDC (Global Runoff Data Centre)
- BGS Africa Groundwater Atlas
- BGS Aquifer Designation Data
- BGS Bangladesh Arsenic Groundwater Data
- BGS Depth to Groundwater Dataset (Great Britain)
- BGS Earthwise - Hydrogeology of Algeria
- BGS Earthwise - Hydrogeology of Tunisia
- BGS Indo-Gangetic Basin Groundwater Maps
- BGS WellMaster Hydrogeological Database (UK)
- Bhutan Glacial Lake Inventory (BGLI) 2021 - NCHM
- Bhutan National Environment Commission (NEC)
- Bhuvan NRSC Soil Data
- Bhuvan Water
- Bias-Corrected CMIP6 for Dynamical Downscaling
- Bihar Water Resources Department Flood Data (India)
- Bio-Oracle ERDDAP (marine environmental layers)
- Biobot Analytics Wastewater Monitoring
- Biogeochemical and Sediment Characteristics of Streambanks, Farmington River Watershed
- BNPB Geoportal Data Bencana Indonesia
- BODC / National Oceanography Centre Linked Systems ERDDAP
- Bokeh
- Bolivia SENAMHI - National Meteorology and Hydrology Service
- BOM Hydrologic Reference Stations
- Botswana Department of Water Affairs - Downloads
- Botswana Geoscience Institute (BGI)
- BR-DWGD Brazilian Daily Weather Gridded Data
- Brazil ANA - National Water and Sanitation Agency Situation Room
- Brazil ANA Flood Monitoring
- Brazil ANA QualiÁgua National River Water Quality Portal
- Brazil HidroWeb
- Brunei Department of Agriculture and Agrifood
- Brunei Ministry of Development Water Services
- Bulgaria NIMH Hydrological Data
- BULL Database: Spanish Basin Attributes for Large-Sample Hydrology
- Bureau of Reclamation AgriMet Network
- Bureau of Reclamation HDB
- Bushland Texas Crop Water Balance / Evapotranspiration Lysimeter Datasets
C
- C3S Satellite Lake Water Level
- C3S Satellite Land Cover
- C3S Satellite Sea Level Gridded Data
- CABra: Catchment Attributes for Brazil (Interactive Dataset Explorer)
- California Data Exchange Center
- California Division of Drinking Water PFAS Data
- California InSAR Subsidence Data (TRE ALTAMIRA)
- California Microplastics: San Francisco Bay
- California Open Data - TRE ALTAMIRA InSAR Subsidence Data
- California SGMA Data Viewer
- California's Groundwater Live
- CalOOS Data Portal (California Ocean Observing Systems)
- CALVIN
- CaMa-Flood Global River Model (U Tokyo)
- Cambodia Ministry of Water Resources and Meteorology (MOWRAM)
- CAMELS (US): Catchment Attributes and Meteorology for Large-sample Studies
- CAMELS-BR: 897 catchments in Brazil (Sextant/Ifremer record)
- CAMELS-CH: 331 catchments in hydrologic Switzerland (DORA record)
- CAMELS-CH Reproducibility Guide and Dataset (Switzerland)
- CAMELS-CH-Chem: Water Quality, Isotopes and Atmospheric Chemistry for Swiss Catchments
- CAMELS-CH: Hydro-meteorological Time Series and Attributes for 331 Catchments (Eawag DORA)
- CAMELS-DE: 1582 catchments in Germany
- CAMELS-DE Hydrological Dataset
- CAMELS-DE on RADAR4KIT (KIT Research Data Repository)
- CAMELS-DE Processing Pipeline and Data (camels-de.org)
- CAMELS-DE: Hydro-meteorological Time Series and Attributes for 1582 German Catchments (FreiDok)
- CAMELS-DK: 3330 Danish catchments (incl. groundwater)
- CAMELS-DK: Danish Catchments with Groundwater Information (GEUS Dataverse)
- CAMELS-DK: Hydrometeorological Time Series for 3330 Danish Catchments (GEUS)
- CAMELS-FI: Hydrometeorological Time Series and Landscape Properties for 320 Finnish Catchments
- CAMELS-FR: Large-sample hydroclimatic dataset for France
- CAMELS-GB: 671 catchments in Great Britain
- CAMELS-GB v2: sub-daily and groundwater extension (671 catchments)
- CAMELS-H: A large-sample hourly hydrometeorological dataset for CONUS watersheds
- CAMELS-NZ: Hourly dataset for Aotearoa New Zealand
- CAMELS-SE: 50 catchments in Sweden (1961-2020)
- CAMELS-SPAT: Spatially distributed large-sample dataset for North America
- CAMELSH: Large-sample hourly hydrometeorological dataset for CONUS (OSTI record)
- Canada Active Floods Open Data (RADARSAT)
- Canada EODMS (Earth Observation Data Management System)
- Canada Groundwater Information Network (GIN)
- Canada HYDAT Database
- Canadian Groundwater Information Network (GIN)
- Canadian Ice Service
- CANOPEX: Canadian hydrometeorological watershed database
- Canterbury Maps Open Data - River Flow and Stage Monitoring Sites (New Zealand)
- CanWIN ERDDAP (Canadian Watershed Information Network)
- Caravan: Global community large-sample hydrology dataset (LEAP/Pangeo zarr)
- Caravan: A global community dataset for large-sample hydrology
- Caravan dataset collection: 4TU.ResearchData
- Caravan Dataset Record (TU Delft Research Portal)
- Caravan Large-Sample Hydrology Dataset (4TU.ResearchData)
- CarpatClim Gridded Climate Dataset (Carpathian Region)
- Catálogo Nacional de Estaciones del IDEAM - Datos Abiertos Colombia
- Catalogue.data.wa.gov.au - WA Water & Environment Data
- Catchments.ie Ireland
- CATDS SMOS Land Products (Centre Aval de Traitement des Données SMOS)
- CAWater-Info Central Asian Water Information Portal
- CAZALAC - UNESCO Center for Arid and Semi-Arid Zones of Latin America
- CDC National Wastewater Surveillance System (NWSS)
- CE-QUAL-ICM
- CE-QUAL-W2 Water Quality Model
- CEDA - Gridded Groundwater Abstraction Dataset for England (1999-2014)
- CEDARE - Centre for Environment and Development for the Arab Region and Europe
- CEDARE ReWater MENA Project
- CEMS Early Warning Data Store - GloFAS Forecast
- CEMS Rapid Mapping (On-Demand Mapping) Portal
- CEMS Risk and Recovery Mapping Portal
- CeNCOOS ERDDAP (Central & Northern California)
- Center for Environmental and Geographic Information Services
- Central Asia Climate Information Portal (CACIP)
- Central Asia Water and Energy Data Portal
- Central Asian Institute for Applied Geosciences (CAIAG)
- Central Ground Water Board (CGWB)
- Central Water Commission (CWC)
- CEOS Earth Observation Handbook Database
- Cesium
- CGSpace - VegDischarge / Africa hydrology datasets (IWMI/CGIAR)
- CGWB India Groundwater Quality Portal
- CHELSA High-Resolution Climate Data
- CHELSA-BIOCLIM+ High-Resolution Climate Predictors (EnviDat)
- Chesapeake Bay Program DataHub
- Chesapeake Monitoring Cooperative - Data Explorer
- Chile DGA - Hydrometeorological Station Network
- Chile DGA Hydrometric Data Portal
- China Hydrology Data Project (Oberlin College)
- China Ministry of Water Resources (MWR)
- China National Environmental Monitoring Centre (CNEMC)
- China National Groundwater Monitoring Network
- China National Hydrological Information Portal (Hydroinfo)
- China Three Gorges Corporation Hydrological Data
- China Underground Water Level Grid
- China Water Database
- CHIRPS Climate Hazards Precipitation
- CHIRPS via IRI/LDEO Climate Data Library
- Chlorophyll a in lakes and streams of the United States (2005-2022)
- CHMI Open Data Portal (Hydrology)
- CIFOR Global Wetlands Map V3 (SWAMP)
- CIMIS - California Irrigation Management Information System
- CIMIS Spatial ETo Reference Evapotranspiration Maps (California)
- City level water withdrawal and scarcity accounts of China
- Citywide Inclusive Sanitation (CWIS) Cities Dashboard
- CKAN
- Climate Change Scenarios SSP
- Climate Data Operators
- ClimateData.ca CMIP6
- ClimateR
- ClimateSERV (SERVIR)
- Climatology and Agrohydrology data via Water Research Observatory
- CMEMS Sea Level Altimetry Reprocessed
- CMORPH High-Resolution Africa Rainfall (Digital Earth Africa CHIRPS)
- CNEMC China Real-time Surface Water Quality
- CNES PEPS (Sentinel Data Hub France)
- CoAgMET Colorado Agricultural Meteorological Network
- Code_Saturne
- Colorado Data Sharing Network (CDSN)
- Colorado DSS / CDSS Data and Tools
- Colorado DWR CDSS REST Web Services (HydroBase)
- Colorado HydroBase / CDSS
- CombiPrecip Radar-Gauge Precipitation (MeteoSwiss Open Data)
- COMET Land Subsidence Database
- COMET-LiCSAR Sentinel-1 InSAR Portal
- Community Science Institute Water Quality Database
- Community Water and Sanitation Agency (CWSA) Ghana - Reports
- CONAE SAOCOM L-Band SAR Catalog
- CONAE Satellite Catalogue - SAOCOM Soil Moisture Products
- CONAGUA SINA - Mexico Water Information System
- Confederación Hidrográfica del Guadalquivir: SAIH
- Congo Basin Observatory
- Congo Basin Science Initiative - Data
- Connecticut DEEP Water Monitoring Data
- Cook Islands Environment Data Portal (SPREP)
- Copernicus Arctic Regional Reanalysis (CARRA) Service Page
- Copernicus Data Space Browser
- Copernicus Early Warning Data Store: GloFAS River Discharge
- Copernicus Emergency Management Service Water Level Observations
- Copernicus EMS Global Flood Monitoring (GFM) Portal
- Copernicus European Drought Observatory (EDO) - Download
- Copernicus Global Drought Observatory (GDO) - Download
- Copernicus Global Flood Monitoring (GFM) - CEMS Information
- Copernicus Global Flood Monitoring (GFM) - EODC Data Portal
- Copernicus Global Water Bodies 100m
- Copernicus GlobColour Ocean Biogeochemistry
- Copernicus HR Coastal Ocean Color
- Copernicus In Situ - Hydrological Data for Water Level Altimetry
- Copernicus Lake Water Quality 300m (Sentinel-3 OLCI)
- Copernicus Lake Water Quality NRT v2 (100m)
- Copernicus Land Monitoring Service
- Copernicus Land Snow Products
- Copernicus Land Vegetation Products
- Copernicus Marine Data Store
- Copernicus Marine Service
- Copernicus Regional Reanalysis for Europe (CERRA) Service Page
- Copernicus SWOT-KaRIn Sea Surface Height
- Copernicus Water Bodies Raster
- Copernicus Water Resources
- Coral Reef Alliance Marine Water Quality Monitoring
- CORDEX Regional Climate
- COSMO-SkyMed SAR Data (ASI/ESA)
- Cote d'Ivoire Data Portal (Open Data for Africa)
- CPCB National Water Quality Monitoring Programme
- CPCB Real-Time Water Quality Monitoring Dashboard (RTWQMS)
- CR2 Explorador Climático & CAMELS-CL (Chile)
- CR2MET Gridded Precipitation and Temperature for Chile (Data Cube Chile)
- CropWat
- CropWatch Cloud (China crop & agro-climatic monitoring)
- CrowdWater Citizen Science
- CRU scPDSI Drought Indices
- CRU TS4.08 Gridded Climate Time Series (CEDA)
- CSIRO Data Access Portal - Hydrology
- CSIRO Data Access Portal - Water Datasets
- CSR GRACE RL06 Mascon Solutions - Texas Data Repository Dataverse
- CUAHSI WOF
- CVC - Datos Abiertos (Corporación Autónoma Regional del Valle del Cauca)
- CWC Flood Forecast System
- CWC Reservoir Storage Dashboard
- CWSA Water Atlas (Ghana)
- Czech Hydrometeorological Institute
- Czech National Open Data Catalogue (NKOD) - Groundwater Datasets
D
- D3.js
- DAERA Northern Ireland: River Water Quality Monitoring Data
- DAHITI Satellite Altimetry Water Levels
- Dal Lake Floating Plastic Waste Detection Dataset (FloPWD 2025, Mendeley Data)
- Danube River Network
- DANVA - Water in Figures (Denmark)
- Dartmouth Flood Observatory
- data.europa.eu - Detection of Pesticides in Waters
- data.europa.eu - Population Connected to Secondary Wastewater Treatment
- data.europa.eu: Open Water Data (European Data Portal)
- data.gouv.fr: Stations hydrométriques (Métropole)
- data.gov.au: ACTGOV Wetlands ANAE
- data.gov.cz - National Open Data Catalogue (CHMI water datasets)
- data.gov.ie - OPW Hydrometric Network Real-time Water Level Data
- data.gov.ie - OPW Hydrometric Network Water Level Latest Reading
- data.gov.tw - Reservoir Water Level Data (Taiwan WRA)
- data.gov.uk - Hydrological Open Data (Environment Agency)
- data.govt.nz - River Environment Classification REC2
- data.ofb.fr: data.eaufrance Catalogue
- data.wa.gov.au Water Datasets Catalogue
- Databank Ondergrond Vlaanderen (DOV) - Flanders, Belgium
- Datacatalog Emilia-Romagna: SIMC Hydro-Meteo Datasets
- Dataful - State/Year-wise Groundwater Recharge, Extractable Resource and Extraction
- Dataful - Water Storage in Dams, Reservoirs & Barrages (India CWC)
- Dataful - Weekly Reservoir Storage Levels (CWC)
- datamap.gov.wales - Natural Resources Wales River Levels API
- DataMapWales - NRW Water Quality Archive Stations
- dataRetrieval
- Dataset of stable isotopes of precipitation in the Eurasian continent
- DataStream
- Datos Abiertos Colombia - Calidad del agua del Río Cauca
- datos.gob.es - SAIH Guadalquivir Dataset
- datos.gob.es - Spanish National Open Data Catalogue (Water/Agua)
- DAYMET Climate Data
- DEA Coastlines (Australia)
- DEA Intertidal (Australia)
- DEA Water Observations (Australia)
- DEA Waterbodies (Australia)
- deal.II
- DeepExtremeCubes: Earth system data for assessing compound heatwave and drought impacts
- Delaware River Basin Commission
- Delaware River Basin Commission Water Quality Data
- Delft3D
- Delft3D Water Modeling
- DENR-EMB Environmental Data Center
- Depth to Groundwater in Africa (IHP-WINS)
- DesInventar Sendai - Disaster Loss Database (UNDRR)
- Destination Earth (DestinE) Digital Twin
- Development of Groundwater Levels Dataset for Chile since 1970
- DGJ: Deutsches Gewässerkundliches Jahrbuch Portal
- Dheed: ERA5 based global database of compound dry and hot extreme events (1950-2023)
- DHMZ Croatia Hydrology
- DHS Program API (Demographic and Health Surveys)
- DHS Program STATcompiler
- DHS Spatial Data Repository
- DIAS - Data Integration and Analysis System (Japan)
- Digital Agency Japan Water Dashboard
- Digital Earth Africa
- Digital Earth Africa - Copernicus Global Land Lake Water Quality Specs
- DINAC Paraguay - Dirección de Meteorología e Hidrología
- DINOloket - DINO/BRO Subsurface and Groundwater Database (Netherlands)
- DINOloket: Subsurface Data of the Netherlands (TNO-GDN)
- DisasterAWARE Explore (Pacific Disaster Center)
- Discover Water (UK Water Industry Dashboard)
- DLR EOC Earth Observation Data Catalog
- DLR Global WaterPack (GWP)
- DLR SWIM Water Extent
- DOE Global Aquifer Properties by 0.5 degree Grid (OSTI / PNNL)
- DOER MP-Sed: Microplastics in Sediments Database
- Données Québec - Physicochemical Monitoring of Rivers and the St. Lawrence
- Drought Atlas of India, 1901-2020
- Drought Impacts in Ceara, Brazil 2019-2022 (4TU.ResearchData)
- Drought Risk Atlas (droughtatlas.unl.edu)
- Drought.gov Climate Engine
- Drought.gov Portal
- DSSAT
- Ducks Unlimited Canada: Canadian Wetland Inventory
- Dutch Water Authorities
- DVstats
- DWD WaWIS Water Management Information System
- DWQR - Drinking Water Quality Regulator for Scotland
- Dynamic World Real-time Land Cover
- DynQual Global Surface Water Quality Model
E
- E-OBS Daily Gridded Observations (Copernicus SurfOBS)
- EAD EnviroPortal Viewer (Abu Dhabi Environmental GIS)
- EarthCARE Cloud and Precipitation Products
- Earthwise BGS - Africa National Groundwater Maps
- East Africa Drought Watch (ICPAC)
- East Africa Hazards Watch (ICPAC)
- eAtlas - Tropical Australia & Reef Data Repository
- EauFrance Water Portal
- Eawag Global Arsenic in Groundwater Dataset
- ECan Open Data Portal - River Datasets (New Zealand)
- ECCC Canada Long-term Freshwater Quality Monitoring
- ECCC Hydrometric Stations OGC API (GeoMet)
- ECCC MSC GeoMet Real-time Hydrometric API
- Eclipse Kura
- Eclipse Mosquitto
- Eclipse Paho
- ECMWF Climate Data Store (CDS)
- Ecoportal Armenia - Water Resources & State Water Cadastre
- Ecoregional distributions of the world's freshwater vertebrate species
- ECOSTRESS ISS Evapotranspiration
- EDI: Arctic LTER Distributed River Water Chemistry (Kuparuk, Oksrukuyik, Trevor)
- EDI: Luquillo Mountains Stream Water Chemistry (knb-lter-luq.20)
- EDI: North Temperate Lakes LTER Water Chemistry (knb-lter-ntl.33)
- EDI: Sacramento-San Joaquin Bay-Delta Continuous Water Quality Monitoring (Central Delta)
- EEA Water Quality Assessment Portal
- EEA WISE WFD ArcGIS REST (Water Framework Directive)
- EFDC
- EFSA Pesticide Residues in Food and Water Monitoring
- EFTEON Spatial Data (Expanded Freshwater & Terrestrial Environmental Observation Network)
- EGRET
- Egypt NWRC
- eHYD Austria Hydrological Data
- Elasticsearch
- eLEAF Satellite Evapotranspiration & Crop Water Services
- ELWAS-WEB: NRW Water Information System
- EM-DAT
- EM-Earth Ensemble Meteorological Dataset (FRDR)
- embalses.info - Spanish Reservoir Levels
- embalses.info: Spanish Reservoir Status (via datos.gob.es)
- Embalses.net: Spanish Reservoir Levels
- Embrapa Irrigation & Center-Pivot Mapping (Brazil)
- EMO-5 High-Resolution Gridded Meteorological Dataset for Europe (JRC)
- EMODnet Chemistry ERDDAP
- EMODnet Chemistry Marine Litter Database (Micro-litter)
- EMODnet Marine Data Network
- EMODnet Physics ERDDAP
- EnMAP Hyperspectral Satellite
- Environment Agency Water Data
- Environment Canterbury Developer Data Portal (Environmental Observations API)
- Environment Canterbury Open Data Portal
- Environment Canterbury River Flow Data
- Environment Canterbury Water Quality Data
- Environment Climate Change Canada Freshwater Quality
- Environmental Data Initiative (EDI) Data Portal
- Environmental Data Initiative (EDI) Repository - LAGOS-US
- Environmental Information Service Namibia (EIS) eLibrary
- Environmental Science & Technology Data
- EODC Public Wiki - Copernicus Global Flood Monitoring (GFM) Product
- EOS LandViewer
- EPA Community Water System Service Areas v2
- EPA CyAN Cyanobacteria Assessment Network
- EPA EnviroAtlas Interactive Map
- EPA Envirofacts Data API
- EPA Ireland Water Data
- EPA Safe Drinking Water Information System
- EPA TMDL Database
- EPA UCMR 5 PFAS Drinking Water Data
- EPA Victoria Water Quality Data & Reports
- EPA WASP Water Quality Model
- EPA Water Quality Exchange (WQX)
- EPA Water Quality Indicators
- EPA WATERS Geospatial Downloads
- EPA WATERS System
- EPANET
- ERA5 Climate Reanalysis
- ERA5-Drought: global drought indices based on ECMWF reanalysis
- ERA5-Land
- ERA5-Land Hourly on DestinE Earth Data Hub
- ERA5-Land Reanalysis
- ESA CCI Inland Waters
- ESA CCI Lakes
- ESA CCI Open Data Portal
- ESA CCI Soil Moisture v09.2
- ESA Climate Change Initiative Soil Moisture
- ESA Global Surface Water Dataset
- ESA Lakes Climate Change Initiative (Lakes_cci) v2.1 - CEDA Archive
- ESA Lakes Climate Change Initiative Products (CEDA Archive)
- ESA Soil Moisture CCI Products (CEDA Archive)
- ESA WorldCover Land Cover
- ESA WorldWater - Surface Water Dynamics (eo4society)
- ESAWAS Regional Benchmarking of WSS Utilities
- ESCWA Water Development Report 9 - Groundwater in the Arab Region
- ESGF CMIP6 Data Portal
- Estonian Environmental Portal: Open Data (KAIA)
- EStreams: An integrated dataset of streamflow, hydro-climatic and landscape variables for Europe
- Ethiopia Data Portal - Energy
- Ethiopia GeoPortal (Esri Africa GeoPortal)
- Ethiopia Ministry Water & Energy
- Ethiopia National Meteorological Institute (NMI) Climate Data
- EU Wastewater Observatory for Public Health (JRC)
- EU Water Initiative Plus for the Eastern Partnership (EUWI+East)
- EU-Hydro River Network Database (Copernicus Land via EEA SDI)
- European Catchment Climate Reanalysis Data (GFZ Data Services)
- European Drought Observatory
- European Drought Observatory (EDO)
- European Environment Agency Waterbase
- European Flood Awareness System (EFAS)
- European Flood Awareness System (EFAS): Data Download
- European Geological Data Infrastructure (EGDI)
- European Ground Motion Service (EGMS)
- European Soil Data Centre (ESDAC)
- European Urban Waste Water Treatment Directive Data
- European Water Association
- European Water Information System
- European Waters - Groundwater Quality Interactive Map
- EUROSTAT Water Statistics
- eWater Source - National Hydrological Modelling Platform
- EWG Arsenic, Nitrate & Chromium-6 Co-occurrence Map
- EWG National Nitrate Analysis Interactive Map
- EWG Tap Water Database (2025 Edition)
- existenz.ch Data APIs - Swiss Hydrology & Environment
- EyeOnWater
- Eyes on the Bay - Maryland Continuous Monitoring
F
- Fanack Water MENA Portal
- FAO AQUASTAT
- FAO Harmonized World Soil Database
- FAO WaPOR v3 Water Productivity
- Farm Service Agency CLU
- Fathom Global Flood Map
- FAWN - Florida Automated Weather Network
- FEMA Effective Model Database
- FEMA National Flood Hazard Layer
- FEniCS
- FFEM-DB: A large-scale dataset of flood fatalities in the Euro-Mediterranean region
- Fiji Hydrological Services
- Fiji Meteorological Services
- Finland Water Research Center
- First global multi-timescale daily SPEI dataset (1982-2021)
- First Nations Drinking Water Advisories (Canada)
- Flash Flood Guidance System (FFGS) - Hydrologic Research Center
- FLODIS: Human displacements, fatalities, and economic damages linked to remotely observed floods
- Flood Prediction Dataset (Mendeley Data)
- Floodinfo.ie National Flood Maps (OPW Ireland)
- FloodList Global Flood News and Data
- FloPy
- Florida DEP Geospatial Open Data
- Flow Restoration and Impacts of Multiple Stressors on Fish Communities in Regulated Rivers (Dryad)
- FMI Finnish Meteorological Institute Open Data
- Folium
- FOREGS Geochemical Atlas of Europe
- FreeFEM
- FreshWater Watch (Earthwatch)
- FROGS Database (AERIS Data Centre)
- FruitLook (Western Cape)
- FutureStreams: A global dataset of future streamflow and water temperature
G
- G-WADI African Flood and Drought Monitor
- GARS Lab: Global Lake Area (GLAKES)
- GARS Lab: Global Lake Surface Water Temperature
- GASTAT Water Accounts Publication (Saudi Arabia)
- GCC-Stat Data Portal (Marsa) - Water Statistics
- GCOOS ERDDAP (Gulf of America Coastal Ocean Observing System)
- GCOOS ERDDAP (Gulf of Mexico Coastal Ocean Observing)
- GDACS - Global Disaster Alert and Coordination System
- GDAL/OGR
- GDE Pulse - Groundwater Dependent Ecosystem Monitoring (TNC)
- GDIS: A global dataset of geocoded disaster locations
- GEBCO Global Ocean Bathymetry
- GEE Community Catalog
- GEMStat Global Water Quality
- GEO AquaWatch
- Geo Senegal - Ressources en eau (water resources)
- GeoDa
- GeoERA Groundwater Resources Map (EGDI Geonetwork)
- GeoERA Groundwater Theme / Pan-European Maps
- Geofabrik OSM Extracts
- GEOGLOWS River Forecast System Data Service
- GEOGLOWS Streamflow Service
- Geological Survey Ireland - Groundwater Data and Maps
- Geological Survey Ireland - Groundwater Recharge Dataset
- Geological Survey of Japan - Groundwater (WellWeb) Network
- Geological Survey of Japan (AIST) Database Collection
- GeoNetwork GDI-DE - World Karst Aquifer Map (WHYMAP WOKAM)
- GeoNode
- Geopandas
- Geoportal INSPIRE Österreich: Austrian Hydrographic Monitoring Network
- Geoportal Jogja (DIY) - Yogyakarta Provincial Geospatial Data (Indonesia)
- Geoportal Philippines
- Geoscience Australia eCat - Groundwater Hydrochemistry Collection
- Geoscience Australia National Groundwater Information System (NGIS)
- Geoscience Australia Web Services Portal
- GeoServer
- German Federal Environment Agency
- German Flood Portal (Hochwasserzentralen)
- GEUS Denmark Water Resources
- GEUS Jupiter National Well Database (Data og kort)
- Gewässerkundlicher Dienst Bayern (GKD): Bavarian Hydrological Service
- GFZ Data Services - Global Gravity-based Groundwater Product (G3P)
- GFZ GravIS Gravity Information Service (Groundwater & Water Storage)
- GFZ ICGEM Gravity Field Models
- Ghana Hydrological Authority (HYDRO)
- Ghana Water Resources Commission
- GHRSST Multi-Sensor Sea Surface Temperature
- GIRI Global Infrastructure Risk Model (UNEP/GRID-Geneva)
- GISTDA National Space Data Center (Thailand)
- GitHub Waterhackweek Mapping Groundwater Contaminants
- GKD Bayern - Bavarian Hydrological Service (Gewässerkundlicher Dienst)
- GKD Bayern - Bavarian Hydrological Service (Water Quality)
- GLAD Global Surface Water Dynamics
- GlaThiDa v3: Worldwide database of glacier thickness observations
- GLDAS Land Data Assimilation
- GLEAM Global Evapotranspiration
- GLEON - Global Lake Ecological Observatory Network
- GLEON via Cary Institute: Global Lake Ecological Observatory Network
- GLHYMPS - Global Hydrogeology Maps of Permeability and Porosity
- GLHYMPS 2.0 - Global Permeability of Unconsolidated and Consolidated Earth (Borealis)
- GLIMS Glacier Database
- Global 5km Rooting Depth Dataset
- Global Agro-Ecological Zones (GAEZ v4, IIASA/FAO)
- Global Annual River Discharge 0.5-degree (Data Basin)
- Global annual wetland dataset at 30 m with fine classification from 2000 to 2022
- Global Aquifer Properties with Recharge (OSTI 2484226)
- Global Aridity Index and Potential Evapotranspiration Database
- Global Aridity Index and Potential Evapotranspiration Database v3
- Global daily evapotranspiration deficit index for drought severity (1979-2022)
- Global Dam Tracker: A database of more than 35,000 dams with location and attributes
- Global Dam Watch
- Global Dam Watch (GDW) v1.0
- Global dataset combining open-source hydropower plant and reservoir data
- Global Desalination and Reuse Map (GWDR)
- Global Drought Hazard dataset (ENERGYDATA.INFO)
- Global Drought Hazard dataset (HDX)
- Global Drought Information System (GDIS) Hub
- Global flash drought inventory based on soil moisture volatility
- Global Flood Awareness System (GloFAS)
- Global Flood Database
- Global Flood Monitor (Dartmouth / Cloud to Street)
- Global Flood Monitoring System (GFMS) - University of Maryland
- Global Forest Watch Satellite Monitoring
- Global Future Drought Layers based on downscaled CMIP6 models
- Global Geo-processed Aquifer Properties by 0.5 deg Grid (OSTI / MSD-LIVE)
- Global Gravity-based Groundwater Product (G3P)
- Global Gravity-based Groundwater Product (G3P) on IHP-WINS
- Global Groundwater Information System (GGIS) - IGRAC
- Global Groundwater Monitoring Network
- Global Groundwater Quality Dataset (IHP-WINS resource - PFAS/Arsenic)
- Global Historical Climatology Network Monthly Precipitation Dataset v4
- Global Historical Streamflow Database (GHSD)
- Global Human Settlement Layer
- Global Inland Waters Microplastics Dataset
- Global Irrigated Area Mapping
- Global Irrigation Map (GMIA v5 - FAO/IIASA)
- Global Lead Service Line Inventory (U.S. EPA)
- Global long-term daily 1km surface soil moisture with physics-informed ML
- Global Mangrove Watch
- Global maps of Forel-Ule index, hue angle and Secchi disk depth from ESA Ocean Colour CCI
- Global monthly CMIP6 climate variables for estimating evapotranspiration
- Global monthly sectoral water use for 2010-2100 at 0.5° resolution across alternative futures
- Global Multi-Sensor Surface Water Indices Dataset
- Global Peatlands Initiative Map
- Global Precipitation Measurement
- Global Reservoir Surface Area Dataset (GRSAD) - Huilin Gao Dataverse
- Global River Water Quality Archive (GRQA)
- Global Runoff Data Centre (GRDC)
- Global Soil Hydraulic Properties dataset based on legacy site observations
- Global Stable Isotope Dataset for Surface Water
- Global Streamflow Indices and Metadata Archive (GSIM)
- Global streamflow indices time series dataset for large-sample hydrology
- Global Sub-Daily Precipitation Indices (GSDR-I)
- Global Surface Water Transitions (1984-2022)
- Global SWAT+ Databases
- Global Terrestrial Network for Permafrost (GTN-P)
- Global thermal tolerance compilation for freshwater invertebrates and fish
- Global Tropical Cyclone Precipitation (MSTCP) Dataset
- Global Urban Footprint
- Global WASH Cluster
- Global Wastewater Treatment Plants (HydroWASTE) v1.0
- Global Water Bodies Dataset (Copernicus)
- Global Water Price Survey (GWI)
- Global Water Scarcity Atlas
- Global Water Security & Sanitation Partnership (World Bank)
- Globally Gridded Groundwater Extraction Volumes and Costs (superwell, OSTI)
- GLOBathy: The global lakes bathymetry dataset
- GloboLakes Lake Surface Water Temperature v4.0 (CEDA)
- GlobSnow Snow Water Equivalent (SWE) v2
- GlobSnow Snow Water Equivalent Service (FMI National Satellite Data Centre)
- GlobSnow v3.0: Northern Hemisphere snow water equivalent dataset
- GlobWetland Africa Wetland Inventory & Inundation Toolbox
- GloFAS Global Flood Awareness System (Copernicus)
- GloFAS v4.4 Global Flood Awareness
- GloFAS-ERA5 operational global river discharge reanalysis 1979: present
- GloHydroRes Global Hydropower & Reservoir Dataset
- GloLakes: Water storage dynamics for 27,000 lakes globally from 1984 to present
- GloLakes Global Water Monitor Lake Storage Explorer
- GLORICH - Global River Chemistry Database
- GLORICH - Global River Chemistry Database (Univ. Hamburg)
- GloRiSe: A global database on river sediment composition
- GLOS Seagull (Great Lakes Observing System)
- GLRSED: Global Lakes/Reservoirs Surface Extent Dataset
- GLWD v2 Global Lakes & Wetlands Database
- GMIA Global Map of Irrigation Areas v5.0 (GeoKur CKAN)
- GMIE: Global maximum irrigation extent and central pivot irrigation dataset
- GNS Geothermal and Groundwater (GGW) Database
- GNS National Water Table Interactive Map (New Zealand)
- GOA-ON Data Explorer: Global Ocean Acidification Observing Network
- Goethe University MIRCA2000 Data Download Center
- GOODD: A global dataset of more than 38,000 georeferenced dams
- Google Earth Engine CMIP6
- Google Earth Engine GSW
- Google Earth Engine Water
- Google Flood Hub
- GPCC Products Download Gate (DWD OpenData)
- GPM IMERG Precipitation
- GRACE-FO Global Weekly Drought Maps
- GRADES Global Reach-scale A priori Discharge
- GRADES-hydroDL Global River Discharge
- Grafana
- GRAiCE: Reconstructing terrestrial water storage anomalies with recurrent neural networks
- GRASS GIS
- GravIS G3P NetCDF Data Repository (ISDC)
- GRDC Freshwater Fluxes to Oceans Dataset
- GRDC Global Freshwater Fluxes into the Oceans
- GRDC Global Sediment Database
- GRDC Long-Term Statistics of River Discharge
- GRDC Reference Hydrological Dataset for Africa
- Great Lakes Observing System (GLOS) Data
- Greater Wellington Open Data
- Greater Wellington Water Monitoring
- Greifswald Mire Centre - Global Peatland Database & Global Peatland Map 2.0
- GRIB Tools
- Gridded consumptive water footprints and benchmarks for crop production in China (2000-2018)
- Gridded global dataset of industrial water use predicted using Random Forest
- GRIIDC ERDDAP (Gulf of Mexico Research Initiative Data)
- GRILSS: Opening the gateway to global reservoir sedimentation data
- Groundwater and Remotely Sensed Phenology of Riparian Trees (Pinnacles NP)
- Groundwater Assessment Platform (GAP Maps)
- Groundwater Atlas Digital Maps
- Groundwater Database - Queensland (CKAN, data.gov.au)
- Groundwater Level Variation Dataset in China's Arid Regions (Mendeley Data)
- Groundwater Storage in Africa (IHP-WINS)
- GRQA: Global River Water Quality Archive (University of Tartu)
- GRUVO - Groundwater Levels and Forecasts for Germany (BGR)
- GSFLOW
- GSI Groundwater Level Data Viewer (gwlevel.ie)
- GTN-H Global Terrestrial Network - Hydrology
- GTWS-MLrec: Global terrestrial water storage reconstruction by machine learning from 1940 to present
- GUARDIAN / IIT Roorkee Hydrology Department Scientific Data Repository
- GUARDIAN River Discharge Dataset
- Gujarat Water Data Portal (Narmada Water Resources and Water Supply Department)
- Gujarat Water Resources Database
- Gulf Cooperation Council Data Portal (spatialagent GCC)
- GWI DesalData (Global Water Intelligence)
- GWI Global Water Intelligence Data
- GWP-Med Mediterranean Water Knowledge Platform
H
- H SAF ASCAT Soil Moisture (EUMETSAT)
- H2O.ai
- Hakai Institute ERDDAP
- HANZE - Historical flood impacts in Europe (naturalhazards.eu)
- Harvard Dataverse - Geum River (South Korea) Reconstructed Naturalized Streamflow
- Hawke's Bay Regional Council Open Data
- Hawke's Bay Regional Council Time Series Data (Hilltop Server)
- HBV
- HDX - WASH Cluster 4W/3W Humanitarian Datasets
- HEC-HMS
- HEC-RAS
- HEC-ResSim
- Hellenic National Oceanographic Data Centre (HNODC)
- HESS - Hydrology and Earth System Sciences Open Data
- High Plains Regional Climate Center Online Data Services
- High Resolution Water Quality of Chinese Lakes (2000-2023)
- High-Resolution Global Streamflow (1980-2020)
- High-resolution gridded streamflow for Ganges-Brahmaputra-Meghna (Bangladesh), 1951-2023
- Him Data Portal - Groundwater (Himalayan states CKAN)
- HIS Central
- Hispagua Spain Hydrography
- Historic Gridded Potential Evapotranspiration (PET) for GB (data.gov.uk)
- Hochwassernachrichtendienst Bayern (HND) - Bavarian Flood Information Service
- Hochwasserportal NRW (LANUV) - Hydrological Measurement Data Online
- Home Assistant
- Hong Kong Marine Water Quality Data (data.gov.hk)
- HortPlus MetWatch Evapotranspiration Tool
- Hourly potential evapotranspiration at 0.1° resolution for the global land surface from 1981: present
- hPET Hourly Potential Evapotranspiration (University of Bristol)
- Hrvatske Vode Croatia
- Hub'Eau Hydrometrie API (France)
- Hub'Eau Real-time Water Data
- Hubbard Brook Ecosystem Study - Streamwater Chemistry (HBWatER)
- Human alterations of the global floodplains 1992-2019
- Humanitarian Data Exchange - Philippines Water Courses (Rivers)
- Humanitarian Data Exchange (HDX) - Ghana Waterways (HOTOSM)
- Hungary Water Research Institute
- Hydro Network Linked Data API
- Hydro Tasmania Water Information
- HYDRO-NET (National Observatory of Athens)
- HydroBASINS Global Sub-basins
- Hydrocron API - SWOT River & Lake Time Series (PO.DAAC)
- HydroDesktop
- HydroFunctions
- Hydrogeological Map of Switzerland - Groundwater Resources 1:500,000 (opendata.swiss)
- Hydrogeological Map of Switzerland - Vulnerability of Groundwater 1:500,000 (opendata.swiss)
- Hydrogeology of Nigeria (BGS Earthwise / Africa Groundwater Atlas)
- HydroGeoSphere
- Hydrographie du Senegal (Senegal GeoPortal map)
- Hydrography90m - High-Resolution Global Hydrographic Dataset (IGB Berlin)
- Hydrological Dataset for Ganges Basin 2000-2022 (Mendeley Data)
- Hydrological Forecasting Time Series
- Hydrometeorology Georgia - Water Management in South Caucasus
- Hydromodel SA Wiki - Data Sources (SAEON)
- HydroSAR Sentinel-1 Flood & Surface Water (NASA SERVIR / ASF)
- HydroSat - University of Stuttgart Institute of Geodesy
- Hydrosat Thermal Satellite Water Stress
- HydroShare CUAHSI
- HydroSHEDS Global Hydrological Data
- HydroSHEDS Global Water Data
- HydroSHEDS v2
- hydrostats
- HydroWASTE Global WWTP Database
- Hydroweb LEGOS - Satellite Altimetry Water Levels of Rivers and Lakes
- Hydroweb Satellite Altimetry for Inland Waters (LEGOS/CNES)
- HypeWeb Global Water Predictions
- HYRAS-DE Gridded Precipitation for Germany (DWD Open Data)
- HYSETS: 14,425 watershed hydrometeorological database for North America
- HYSETS North America Database
I
- IAEA GNIP - Global Network of Isotopes in Precipitation
- IAEA GNIR - Global Network of Isotopes in Rivers
- IAEA WISER: Global Network of Isotopes in Precipitation/Rivers (GNIP/GNIR)
- IAI / SISSA Drought Tool (Inter-American Institute)
- IBAT Integrated Biodiversity Assessment Tool - Freshwater
- Iberia01 Gridded Precipitation and Temperature (DIGITAL.CSIC)
- IBNET - International Benchmarking Network for Water and Sanitation Utilities
- IBWC - International Boundary and Water Commission (US-Mexico)
- ICARDA Regional Crop Water / Evapotranspiration Network (NENA)
- ICARE Atmosphere Data Centre
- ICDC Atmosphere Precipitation Data Collection (University of Hamburg)
- ICDC Hamburg Land Remote-Sensing Data (Soil Moisture, Snow, Lakes)
- ICDC JRA-55 Japanese Reanalysis (Univ. Hamburg)
- ICDC TAMSAT Rainfall Estimates for Africa (Univ. Hamburg)
- ICDC University of Hamburg - ASCAT MetOp Surface Soil Moisture
- ICES Oceanography Database
- ICESat-2 ATL13 Inland Water Surface Height v7
- ICID Irrigation and Drainage Database
- ICIMOD HI-CHAP - HKH Climate and Hydrology Visualization & Access Portal
- ICIMOD Library - Climatic and Hydrological Atlas of Nepal
- ICIMOD Library - Reference Climate Dataset for the Indus, Ganges and Brahmaputra Basins (HI-AWARE WP2)
- ICIMOD Regional Database System (RDS)
- ICOLD World Register of Dams
- Icon Water Storage Levels (ACT)
- ICPAC African Rainfall Climatology v2 (ARC2)
- ICPAC Data Center - FEWSNET drought products
- ICPAC Data Center (GMES portal)
- ICWRGC / GRDC River Discharge Data Service
- IDA Desalination Yearbook / IDA Water Security Handbook
- Idaho Department of Water Resources - Mapping Evapotranspiration (METRIC)
- Idaho Department of Water Resources Open Data
- IDEAM DHIME - Colombia Hydrometeorological Data
- IDEAM Geoglows Hydrology Portal
- IdroGEO: Italian Landslide and Flood Platform (ISPRA)
- IDWR Research / Water Rights & Agricultural Water Use Tools (Idaho)
- IG PAS Data Portal: hydrology datasets (Institute of Geophysics, Polish Academy of Sciences)
- IGAM Portal InfoHidro - Minas Gerais Water Resources
- IGRAC Groundwater Portal
- IHE Delft Water Research Data
- IHME GHDx - LMIC WASH Access Geospatial Estimates
- IITM Centre for Climate Change Research Data Portal
- Ilmateenistus Estonia Water
- IMD Climate Data Service Portal (CDSP)
- IMD Gridded Rainfall NetCDF
- IMD Regional Climate Centre (RA II) - South Asia Gridded Rainfall & IMDAA Reanalysis
- IMGW Poland Hydrological Data Portal
- IMGW-PIB Dane Publiczne - Polish Meteorological & Hydrological Open Data
- IMGW-PIB Public Data Portal (Poland)
- IMN Costa Rica - Atlas Climatológico / Datos
- IMOS OceanCurrent
- Imperial Irrigation District Water
- INA Aplicación Web de Datos Hidrológicos (Argentina)
- INAMHI Ecuador - Geoinformación Hidrometeorológica
- InaRISK Portal - BNPB Indonesia (flood hazard)
- India Biodiversity Portal
- India Data Portal - Groundwater (CGWB) CKAN
- India Data Portal - Groundwater (Quality & Levels)
- India Drought Atlas (1901-2021)
- India Drought Monitor
- India Flood Inventory Database
- India Meteorological Department Rainfall
- India Open Government Data Water
- India Water Portal - Water Resources Knowledge & Data
- India Water Resources Open Data - Datameet/CIS Open Water Data compendium
- India-WRIS Portal
- Indian Ocean Tuna Commission (IOTC) Oceanographic Data
- Indian Precipitation Ensemble Dataset
- Indonesia BMKG - Agency for Meteorology Climatology and Geophysics
- Indonesia Water Portal
- Indonesia WRDC
- Indus River System Authority
- InfluxDB
- Info Água: APA Portuguese Water Information Portal
- INMET BDMEP - Banco de Dados Meteorológicos
- INMET Estações Automáticas / Mapa de Estações
- INPE Brazil Data Cube (BDC)
- INPE TerraBrasilis
- INSPIRE Geoportal - SNIRH Hydrometric Stations Network (Portugal)
- INSPIRE Water Directive EU
- Institute of Water Modelling
- International Charter: Space and Major Disasters
- International Fund for Saving the Aral Sea (IFAS)
- International Pellet Watch (IPW)
- International Soil Moisture Network (ISMN)
- Inventory of shallow landslides triggered by extreme precipitation in July 2023 in Beijing
- Inventory of Shared Water Resources in Western Asia (ESCWA-BGR)
- Inventory of Shared Water Resources in Western Asia (ESCWA) - Tigris Basin Chapter
- Iowa DNR AQuIA Water Quality Portal
- Iowa Water Quality Information System (IWQIS)
- Iran Open Data Center - Interactive Data Map
- Iran Open Data Center - Water Datasets
- Iran Water Resources Research (IWRR) Journal & Data
- Iraq Strategy for Water and Land Resources (SWLRI) - Hydro Nova
- IRC WASH - Building Blocks & Systems Resources
- Ireland EPA Hydronet Water Level Data
- Ireland Water Levels and Flow - data.gov.ie
- IRI/LDEO Climate Data Library
- IRRINET / IRRIFRAME Irrigation Advisory
- ISIMIP Climate Impact Data
- ISIMIP Inter-Sectoral Impact Model Intercomparison Project Water Sector
- ISLSCP II Ecosystem Rooting Depths
- ISPRA Indicatori Ambientali: Water Sources & Balance (Flows/Precipitation)
- ISPRA Inland Waters Database
- Israel Marine Data Center (ISRAMAR)
- Israel Water Authority - Hydrological Service Surface Water Data Reports
- Israel Water Authority - National Water Efficiency Report
- ISRO VEDAS - Altimetry Water Levels & SMAP Soil Moisture
- Italy ISPRA Environmental Data
- Italy National Geoportal - MASE (Geoportale Nazionale)
- IWA Water Loss Specialist Group Resources
- IWA Water Reuse SCADA Database
- IWMI Africa Water Data Portal
- IWMI Groundwater Governance in the Arab World (GW-MENA)
- IWMI Water Data Portal - Global Irrigated Area Mapping
- IWMI Water Data Portal (waterdata.iwmi.org)
- IWMI Water Data Science Programme
J
- Jal Jeevan Mission Dashboard (DDWS) - India
- Japan e-Stat Water Statistics
- Japan Geospatial Information Authority (GSI) Flood Maps
- Japan Meteorological Agency AMeDAS Precipitation Network
- Japan Meteorological Agency Flood Warnings
- Japan National Institute for Environmental Studies (NIES) Water Database
- Japan Oceanographic Data Center
- Japan Water Agency Real-time Data
- Japan Water Information System (JWIS) - MLIT
- Järviwiki: Finnish Lake Observations (SYKE)
- Jason-3 / Sentinel-6 Radar Altimetry for Rivers and Lakes
- JAXA ALOS Series Open and Free Data
- JAXA ALOS-4 PALSAR-3 L-band SAR
- JAXA AMSR Earth Observation Data
- JAXA Earth API
- JAXA G-Portal
- JAXA GCOM-W AMSR2 Water Cycle Products
- JAXA GCOM-W/AMSR2 Soil Moisture & Water-Cycle Products (G-Portal info)
- JAXA GOSAT-GW Water Cycle
- JAXA GSMaP Global Rainfall Watch
- JAXA JASMES Global Water-Cycle Monitoring
- JAXA JASMES Satellite Monitoring
- JAXA JCOPE-T 1km Ocean Weather Forecast
- JBA Risk Management Global Flood Maps
- JJM Water Quality Management Information System (WQMIS), India
- Jordan Data Portal (DOS) - Statistics including Water
- Jordan Ministry of Water and Irrigation
- Jordan Open Government Data Portal - Water Sector
- Journal of Hydrology Database
- JRC European Drought Observatory (EDO) Data
- JRC Global River Flood Hazard Maps (data.europa.eu, 100-yr)
- Juneau Stream Chemistry and Discharge for Inorganic Carbon Flux (Ag Data Commons)
- Jupyter Notebooks
K
- K-water South Korea
- Kansas Mesonet Evapotranspiration & Soil Moisture
- Karnataka KWMRIS Portal
- Karnataka State Natural Disaster Monitoring Centre (KSNDMC) Hydrology
- Kazakhstan National Hydrometeorological Service (Kazhydromet)
- Kenya Meteorological Department - Maprooms & Climate Data
- Kenya Water Resources Authority
- Keras
- Keskkonnaagentuur Estonia
- Kiribati Meteorological Service Climate Data
- KMA API Hub (Korea Meteorological Administration)
- KNMI Climate Explorer
- Korea Environment Corporation Water Quality Monitoring (KECO)
- Korea Hydrographic and Oceanographic Agency (KHOA) ocean observations
- Korea Institute of Civil Engineering and Technology (KICT) Water Data
- Korea Meteorological Administration (KMA) Marine Observations
- Korea Water Resources Research
- Kuwait Beatona Environmental Open Data Catalogue (EPA)
- Kuwait Institute for Scientific Research (KISR) Water Resources
- Kyrgyzstan Hydrometeorology Agency (Kyrgyzhydromet)
L
- L'hydrométrie en Wallonie (SPW)
- La Plata Basin Intergovernmental Coordinating Committee (CIC)
- LAGOS-US / LAGOS Lake Ecological Database
- Lake Chad Basin Information System
- Lake Champlain Basin Program - Long-term Water Quality Monitoring
- Lake Map Database (lakemaps.org)
- Lake Victoria Basin Commission (LVBC)
- Lake Winnipeg DataStream
- LakeATLAS: Global hydro-environmental lake characteristics at high spatial resolution
- LakeBeD-US Lake Benchmark Dataset
- LakeBeD-US: Computer Science Edition (Hugging Face)
- Lakes_cci Data Access Portal (laketemp.net)
- LamaH-CE Central European Large-Sample Hydrology
- Land, Air, Water Aotearoa (LAWA) - Explore Data
- Landlab
- Landsat Collection 2 Water Index Products
- Landsat Science Portal
- Landsat-Sentinel Water Indices
- LANID Landsat-based Irrigation Dataset (US, 1997-2017)
- LANUK NRW - Fachinformationssysteme Wasser (ELWAS)
- LANUK NRW: Grundwasserdaten Online
- Laos Ministry of Natural Resources and Environment (MONRE)
- Latvia LVGMC Hydrological Data
- LAWA Download Data
- LAWA Groundwater Quality (Land Air Water Aotearoa)
- LCRA Hydromet (Lower Colorado River basin, Texas)
- LDEO Tree-Ring Reconstructed PDSI Drought Atlas (IRI Data Library)
- Leaflet
- Lebanon Litani River Authority
- LGIA - Latvian Inland Hydrography Download Service
- LiPAD - LiDAR Portal for Archiving and Distribution (Philippines DOST)
- Lithologic Database Portal
- LITTERBASE: Marine Litter and Microplastics Portal
- Living Handbook CAMELS-DE Showcase (NFDI4Earth, Germany)
- London Datastore - London Reservoir Levels
- Long-term daily hydrometeorological drought indices, soil moisture, and ET for ICOS sites
- LRIS Portal - Land Resource Information System
- LUBW Water Quality Monitoring
M
- Mackenzie DataStream
- Mackenzie DataStream - Open Water Quality Hub
- Madhya Pradesh Water Resources Department Data Portal
- Maharashtra GSDA Portal
- Maine EGAD Environmental Sampling Database
- Malawi Department of Climate Change and Meteorological Services
- Malawi Department of Water Resources
- Malaysia Department of Irrigation and Drainage (DID) Hydrological Data
- Malaysia Department of Irrigation and Drainage (JPS) Main Portal
- Malaysia JPS Portal WPKL (Kuala Lumpur)
- Malaysia Public Infobanjir
- Maldives Ministry of Environment Climate Change Technology
- Manitoba Hydro Hydrological Data
- Manitoba Hydro Hydrological Data Application
- Manitoba Hydrologic Forecast Centre
- Manitoba River Conditions and Forecasts Web App
- Manning's Roughness Database
- MapBiomas Agua - Brazil Satellite Water Surface Platform
- MapServer
- MapServer Ethiopia (EthioGIS)
- MARACOOS OceansMap (Mid-Atlantic)
- Marine Institute Ireland ERDDAP
- Maryland Eyes on the Bay
- Maryland Eyes on the Bay - Chesapeake Water Quality
- Matplotlib
- Mauritania / Senegal River Basin Data (National Academies Senegal Basin sources)
- Maxar Open Data Program
- Mayavi
- McGill Global HydroLAB: GLWD
- MDPI Water Open Access
- Mekong River Commission
- Mekong River Commission Data
- Mekong-U.S. Partnership - Mekong Water Data Tools and Resources
- Melbourne Water Open Data Hub
- MERIT Hydro Global Hydrography Dataset
- MERRA-2
- MESH
- metadata.naturalresources.wales - NRW River Levels API Record
- meteo.lt - Lithuanian Hydrometeorological Service Hydrological Data
- MeteoSwiss RhiresD Daily Gridded Precipitation (Open Data)
- MethaneSAT Methane Emissions Data
- Metro Vancouver - Reservoir Levels and Water Use
- MEWA Open Data Portal
- Mexican Drought Atlas (MXDA)
- Mexico SMN (Servicio Meteorologico Nacional) Web Service API
- MfE River Flows Layer (data.mfe.govt.nz)
- Michigan EGLE Maps & Data Hub
- Michigan PFAS Action Response Team (MPART) Data
- Microsoft Planetary Computer Pro
- Miljödata-MVM (SLU) - Swedish Lakes & Watercourses
- Ministry for the Environment Data Service - Freshwater
- Minnesota Cooperative Groundwater Monitoring (CGM)
- Minnesota Department of Health PFAS Dashboard
- Minnesota DNR LakeFinder: Lake Water Levels
- Minnesota DNR/MPCA Cooperative Stream Gaging
- Minnesota Geospatial Commons - Cooperative Stream Gaging Locations
- Minnesota Geospatial Commons: Lake Bathymetry
- Minnesota Ground Water GIS Data (MnGeo)
- Minnesota LakeBrowser (UMN Remote Sensing)
- Minnesota Pollution Control Agency Surface Water Data
- MIRCA2000 Monthly Irrigated and Rainfed Crop Areas
- MIT Global Change Water Systems Data
- MITECO Spain Water Statistics
- ML-based reconstruction of long-term global terrestrial water storage anomalies
- MLIT Japan Water Information
- Modesto Irrigation District Water Information
- MODIS Aqua Snow Cover Daily (MYD10A1)
- MODIS Global Evapotranspiration
- MODIS Vegetation Indices (NDVI/EVI) - MOD13Q1
- MODIS Water Products NASA
- MoES Survey on Microplastic and Marine Debris (India)
- MongoDB
- Montana Ground Water Information Center (GWIC)
- MOSDAC India (Meteorological & Oceanographic Satellite Data Archive)
- Mozambique National Directorate of Water Resources (DNGRH) - ARA-Sul
- MSWEP Multi-Source Weighted-Ensemble Precipitation
- MT3DMS
- Multilevel Dataset of Microplastic Abundance in World's Upper Ocean
- Murray Global Intertidal / Tidal Wetland Change
- Murray-Darling Basin Authority
- Murray-Darling Basin Authority River Murray Data
- Murray-Darling Basin Water Market Catchment Dataset (ABARES)
- mWater Open Data
- Myanmar Department of Meteorology and Hydrology (DMH)
- Myanmar Irrigation and Water Utilization Management Department
- MyWater Portal
N
- N-WASH MIS (Nepal)
- NAC2H: North-American Climate Change and Hydroclimatology Dataset (OSF)
- NACP Australian Drought Monitor
- Nagios
- Naiades French Water Quality Database
- NamWater Hydrological Services
- NASA AppEEARS
- NASA ARIA Flood and Damage Proxy Maps
- NASA Earth Observations (NEO)
- NASA Earthdata GIS Services
- NASA Earthdata Search
- NASA Earthdata Water Quality
- NASA EMIT Imaging Spectrometer
- NASA FIRMS Fire Information for Resource Management
- NASA FLDAS (Famine Early Warning Land Data Assimilation)
- NASA GES DISC
- NASA Giovanni
- NASA GRACE
- NASA GSFC Earth Sciences - GRACE Terrestrial Water Storage (GSFC mascons)
- NASA GSFC Global Water Monitoring (GWM) - Lakes and Reservoirs
- NASA Harvest Portal - FAO AQUASTAT & Ag-Water Data
- NASA ICESat-2 Inland Water Surface Elevation (ATL13)
- NASA LAADS DAAC
- NASA LANCE Near Real-Time Data
- NASA Land Information System (LIS) / LDAS
- NASA NRT Global Flood Products v1.1
- NASA OceanColor Web
- NASA Open Data Portal - Global Reservoir and Dam Database (GRanD v1)
- NASA PACE Ocean Color
- NASA PO.DAAC (Physical Oceanography DAAC)
- NASA POWER (Prediction of Worldwide Energy Resources)
- NASA Sea Level Change Portal
- NASA SRTM Water Body Shapefiles
- NASA STREAM Water Quality Maps
- NASA SWOT (Surface Water and Ocean Topography) Data Portal
- NASA SWOT River Discharge v3
- NASA Worldview
- NASA-ISRO NISAR SAR Data
- National Center for Hydrology and Meteorology (NCHM) - Bhutan
- National Cryosphere Desert Data Center (NCDC) - Hydrology datasets
- National Earth System Science Data Center of China (Geodata.cn)
- National Environmental Data Centre (NEDC) NZ
- National Groundwater Monitoring Network
- National Institute of Hydrology (NIH), Roorkee
- National Long-term Water Quality Monitoring Data
- National Tibetan Plateau / Third Pole Environment Data Center (TPDC)
- National Water Data Portal (NWDP)
- National Water Mission Database
- National Water-Well Database
- NATMO India Soil Maps
- Natural Earth Water Vectors
- Natural Resources Canada - Flood Mapping Data
- Natural Resources Wales
- Natural Resources Wales River Levels API
- Nature Scientific Data Water Collection
- Nature Water Research Archive
- NatureScot Data Services - Standing Waters Database
- Nauru Environment Data Portal
- NBSS&LUP India Soil Map
- NCAR CAMELS Hydrometeorological Dataset
- NCAR Research Data Archive
- NCCR Marine Litter & Microplastics Monitoring (India)
- NCEP-NCAR Reanalysis
- NCHM Bhutan - National Center for Hydrology and Meteorology
- NDMA India - Flood Hazard Atlases
- Nebraska Groundwater-Level Monitoring (UNL SNR)
- NEC-DROMO: Near-global agro-climatological drought monitoring dataset
- NEON Data Portal (surface water chemistry & discharge)
- Nepal Department of Hydrology and Meteorology
- Nepal River Watch Data Management System
- NERACOOS ERDDAP - Gulf of Maine Coastal Water Quality
- NERACOOS ERDDAP (Gulf of Maine Ocean Observing)
- NERC EDS Data Search - ESA GlobSnow & CCI Records
- NERRS Centralized Data Management Office (CDMO)
- NetCDF
- Nevada Division of Water Resources Open Data
- Nevada Division of Water Resources Well Log Query
- New Brunswick Water Quality Data Portal
- New Mexico Water Data (CKAN catalog + WaDE)
- New Mexico Water Data Catalog
- New Mexico Water Data Catalog - USGS National Ground-Water Monitoring Network
- New York State DEC Water Quality Data
- New Zealand Water Research Center
- NEX-GDDP-CMIP6 NASA Downscaled
- NGMP - National Groundwater Monitoring Programme (data.govt.nz)
- NH-SWE: Northern Hemisphere Snow Water Equivalent from in situ snow depth time series
- NHD / 3DHP via The National Map Hydrography Services
- NHDPlus High Resolution
- NHSBSA Open Data Portal (CKAN) - environmental water datasets
- NIES Lake Kasumigaura Long-term Monitoring Database (Japan)
- Niger Basin Authority (NBA) Observatory
- Niger-HYCOS Hydrological Information System (Niger Basin Authority)
- Nigeria Hydrological Services Agency (NIHSA)
- Nigeria Water Resources Portal
- Nile Basin DSS
- Nile Basin Water Quality Database
- NIMH Bulgaria Hydrology
- Nine Springs WWTP Dataset
- NIVA AquaMonitor - Norwegian Water Quality Data
- NIVA AquaMonitor (Norwegian Institute for Water Research)
- NIWA / Earth Sciences NZ Open Data (ArcGIS Hub)
- NIWA DataHub
- NIWA Hydro Web Portal
- NIWA Water Quality Information System (WQIS)
- NLWKN Pegelonline: Lower Saxony Gauges
- NOAA Atlas 14 Precipitation Frequency
- NOAA CMORPH Satellite Precipitation CDR
- NOAA Coastal Ocean Reanalysis (CORA)
- NOAA CoastWatch/OceanWatch
- NOAA Digital Coast Hydrography
- NOAA Digital Coast Water Quality
- NOAA GLERL Great Lakes Data
- NOAA HABSOS (Harmful Algal Bloom Observing System)
- NOAA Harmful Algal Bloom Monitoring System
- NOAA IMS Snow and Ice Analysis
- NOAA National Water Model
- NOAA National Water Prediction Service
- NOAA NCEI Marine Microplastics Database
- NOAA S-111 Surface Water Currents (AWS Open Data)
- NOAA Sea Level Rise Satellite Data
- NOAA STAR Global Vegetation Health Products
- NOAA Tides and Currents
- NOAA Tools
- NOAA World Ocean Database 2025
- Node-RED
- NORA3 / MET Nordic Regional Reanalysis (THREDDS)
- NORA3 metocean-api Programmatic Access
- NorSWE: Northern Hemisphere in situ snow water equivalent dataset (1979-2021)
- North American Drought Atlas (NADA)
- North American Drought Monitor (NOAA NCEI hub)
- North Carolina DEQ Open Data (Ambient Monitoring System)
- North Dakota DEQ Water Quality Data Portal
- Northern Territory Water Data Portal
- Northland Regional Council Environmental Data (LAWA)
- Nova Scotia Automated Surface Water Quality Monitoring
- NRCS SCAN - Soil Climate Analysis Network
- NRCS SNOTEL Network
- NRSC Bhuvan Bhujal Portal
- NRSC India - Flood Inundation Mapping (NDEM)
- NSIDC Permafrost and Frozen Ground Data
- NSIDC Sea Ice Index v4
- NSW DCCEEW Water Science, Data & Modelling
- NSW Flood Data Portal (DCCEEW Floodplains)
- NSW Flood Data Portal (NSW SES)
- NSW Real-Time Water Data (WaterNSW)
- NSW SEED Real-Time Groundwater Monitoring
- NSW SEED Real-Time Surface Water Quality & Monitoring Data
- NSW WaterInsights (New South Wales, Australia)
- NT Water Monitoring Locations (NTG Open Data)
- NTL-LTER Clear Lake Stream and Meteorological Monitoring 2019-2023 (EDI)
- NumPy
- Nutrient Monitoring Networks
- NVE Hydrological API (HydAPI)
- NVE Norwegian Hydrology
- NVE Sildre Norwegian Water Data
- NWASCO - Zambia Urban Water Supply & Sanitation Sector Reports
- NWASCO Zambia - Urban & Peri-Urban Water Sector Reports
- NYC DEP Green Infrastructure Asset Database
- NZ River Flows - data.govt.nz
- NZ River Maps
O
- OasisHUB Fathom Free Flood Hazard Data
- OBIS - Ocean Biodiversity Information System
- Observable
- Ocean Conservancy TIDES Database
- Ocean Networks Canada ERDDAP
- Ocean Tracking Network ERDDAP
- OD Mekong Datahub - Thailand Water Datasets
- OD Mekong Datahub - Vietnam Water & Groundwater Datasets
- ODM Tools
- OECD Water Database
- Ofwat - PR24 Historical Performance Trends
- Ofwat Water Company Performance Report Data
- OGC WaterML Standards
- OGGM Climate Data (ERA5/CRU/W5E5) Reference
- Ohio DNR Groundwater Observation Well Network (AQUARIUS)
- OKACOM - Cubango-Okavango River Basin
- OKACOM - Cubango-Okavango River Basin Monitoring & Projects
- Oklahoma Mesonet Agriculture & Irrigation Planner
- Oklahoma Mesonet Soil Physical Properties Database
- Oklahoma Water Resources Board - Lake Level Data Portal
- Oklahoma Water Resources Board Groundwater Data & Maps
- Old World Drought Atlas (OWDA)
- Oman Open Data Portal (NCSI)
- ONFIRE: A monthly gridded burned area database of national wildland fire data
- ONS Brazil: EAR Daily Reservoir Stored Energy (Open Data)
- Ontario Provincial Groundwater Monitoring Information System (PGMIS)
- OOVV Czech Hydrological Data
- Open Data South Africa Toolkit - Water & Climate Resources
- Open Development Cambodia - Water & Groundwater Datasets
- Open Development Laos - Water Datasets
- Open Development Mekong Datahub (CKAN)
- Open Weather Map Precipitation & Weather API
- Open-Meteo Free Weather & Hydrology API
- Open.NRW - Hydrologie NRW Geprüfte Zeitreihen der Wasserstände
- openAFRICA Water Datasets
- OpenAQ Air and Environmental Quality Platform
- OpenCity - National Compilation on Dynamic Ground Water Resources of India 2022
- OpenCity - National Compilation on Dynamic Ground Water Resources of India 2023
- OpenCity - National Compilation on Dynamic Ground Water Resources of India 2024
- OpenCity - Telangana Water Supply Data (Urban Local Bodies)
- opendata.swiss - NAQUA National Groundwater Monitoring (Switzerland)
- opendata.swiss: FOEN Hydrological Study Area Gauging Stations
- OpenDOSM - Malaysia River Basin Pollution Monitoring
- OpenET 48-State Evapotranspiration
- OpenET API Documentation - Satellite Evapotranspiration
- OpenET Data Explorer
- OpenFOAM
- OpenHAB
- OpenHi.net (Open Hydrosystem Information Network)
- OpenLayers
- OpenMUC
- OpenTopography LiDAR Portal
- OpenWater
- OPERA Dynamic Surface Water Extent (DSWx-S1)
- OPW Hydrometric and Hydrological Data (gov.ie)
- Orange-Senqu River Commission (ORASECOM)
- Oregon Near Real-Time Hydrographics Data
- Oregon Water Data Portal
- ORNL DAAC (Biogeochemical Dynamics)
- ORNL DAAC Global Root Profiles
- OSM Water Layer Global
- OSM Water Polygons
- Otago Regional Council Environmental Data Portal
- Otago Regional Council Environmental Data Portal (New Zealand)
- OTCA Amazon Regional Observatory (Aguas Amazónicas)
- Our Environment (Manaaki Whenua)
P
- Pacific Climate Change Science Program Data Portal
- Pacific Community (SPC) GeoScience Division - Water Resources
- Pacific Data Hub
- Pacific Disaster Center DisasterAWARE
- Pacific Environment Data Portal (SPREP)
- Pacific Islands Applied Geoscience Commission (SOPAC) Hydrogeological Data
- Pacific-Australia Climate Change Science and Adaptation Planning (PACCSAP)
- PacIOOS ERDDAP
- PacIOOS ERDDAP - Pacific Islands Coastal Water Quality
- PAGASA Climate Data
- PAGASA Hydromet
- Pakistan Council of Research in Water Resources (PCRWR)
- Pakistan FFD - Rivers Flow Comparison (Today)
- Pakistan Flood Forecasting Division (FFD) Dashboard
- Pakistan Meteorological Department - Climate Data Processing Centre
- Pakistan Water and Power Development Authority (WAPDA)
- Palabos
- Palestinian Central Bureau of Statistics - Water Statistics
- Pandas
- Papua New Guinea Environment Data Portal
- Paraguay DINAC Meteorological and Hydrological Service
- ParaView
- PAUWES Data Portal (GeoNetwork catalogue)
- PAUWES Data Portal (GeoNetwork)
- PCR-GLOBWB Global Hydrological Model Output
- Pegelalarm / FloodAlert Water Level API
- Performance Assessment System (PAS) for Urban Water & Sanitation - CEPT
- PERSIANN Satellite Precipitation (CHRS Data Portal)
- PEST
- Philippines FOI - BAGWD Water Quality Dataset 2025
- Philippines FOI - DENR-EMB Water Quality Monitoring Dataset
- Philippines LIDAR Portal for Flood Mapping (Project NOAH)
- Philippines NWRB
- Philippines PAGASA Flood Forecasting and Warning System
- PISCO Peruvian Interpolated Hydrometeorological Data (IRI Data Library)
- PISCOeo_pm Reference Evapotranspiration for Peru (IRI Data Library)
- Planet Explorer
- Plotly
- PNG National Weather Service
- PO.DAAC Cookbook - SWOT Hydrology Data Access
- Pollutant Load Estimation Tools
- Portfolio Manager
- POSEIDON Marine Monitoring System (Greece)
- PostGIS
- PostgreSQL
- PRISM Climate Group
- PRMS
- Project NOAH Hazard Maps (BetterGov.ph Open Data)
- Prometheus
- PSMSL: Permanent Service for Mean Sea Level
- Punjab Irrigation Department - Canal & Groundwater Data Portal
- PyClimate
- PyHSPF
- PySheds
- Python Water Libraries
- PyTorch
Q
- Qatar Open Data Portal - Monthly Wastewater Volume
- Qatar Open Data Portal - Monthly Water Production
- Qatar Open Data Portal - Total Water Storage / Groundwater Abstraction
- QGIS
- QUAL2K Stream Water Quality Model
- Quality controlled groundwater level data with specific yield over India
- Quantitative Analyses of Global River Discharge Variability and Hydrograph Shape (Mendeley Data)
- Quantitative datasets of societal value, technology and policy for human-water system modelling
- Quebec Hydrological Data Centre (Centre d'expertise hydrique du Quebec - CEHQ)
- Queensland Flood Mapping (Queensland Reconstruction Authority)
- Queensland Government Water Monitoring Information Portal
- Queensland Groundwater Database
- Queensland Open Data - Ambient Surface Water Quality
- Queensland Open Data Portal - Water Monitoring Network
- Queensland Water Monitoring Hydrology Archive (Open Data)
- Queensland Water Quality Data and Assessments
R
- R for Water
- RADKLIM Radar Precipitation Climatology (DWD Open Data)
- RAIN4PE: High-Resolution Gridded Precipitation for Peru and Ecuador (GFZ Data Services)
- Rajasthan Water Resources Database
- Rasterio
- RCMRD Africa GeoPortal - Africa Water Bodies
- RCMRD GMES & Africa Geoportal
- RCMRD on Africa GeoPortal
- RCMRD Open Data Portal
- RCoE Data Geoportal (RCMRD)
- ReaLSAT: A global dataset of reservoir and lake surface area variations
- ReaLSAT: Reservoir and Lake Surface Area Timeseries (UMN)
- Reconstructed Global Gridded Monthly Sectoral Water Withdrawals (incl. irrigation)
- Reconstruction of hourly coastal water levels and counterfactuals without sea level rise
- REEF3D
- REGEN Global Daily Precipitation (Research Data Australia)
- REGEN Long-Term Stations Daily Precipitation (RDA)
- ReliefWeb Disasters API (UN OCHA)
- Remote sensing-based extension of GRDC discharge time series
- Reservoir DC-Region Real-Time Water Quality Portal
- Rhine Commission
- RIHMI-WDC Roshydromet Data Center
- Rijkswaterstaat Waterdata & WaterWebservices
- Rijkswaterstaat Waterinfo Netherlands
- Rijkswaterstaat WaterWebservices - Dutch Water Data API
- RISE Sri Lanka - Full River Levels
- RiskScape Multi-Hazard Risk Model (NIWA/GNS)
- RiverApp Global River Levels
- RIVERNET.LK - Live River Levels & Flood Alerts Sri Lanka
- RiverWatch.LK - Sri Lanka River Water Levels Dashboard
- RivRetrieve R Package (Brazil and Chile river gauge data access)
- Robert Carlson Secchi Dip-In (NALMS)
- ROBIN Reference Hydrological Network
- Romania National Institute of Hydrology and Water Management
- Romania Water Research Institute
- Roshydromet Russia
- Royal Irrigation Department Flood/Water Monitoring (Thailand)
- RTE data portal - French Hydraulic Stock (Reservoir Fill Levels)
- Rufiji Basin Climate Change Decision Support Tool (IRA, UDSM)
- Rural Water Supply Network (RWSN)
- Rural Water Supply Network (RWSN) - Data for Action
- Rwanda Water Portal (RWB)
S
- SADC Groundwater Information Portal (SADC-GIP)
- SADC Groundwater Portal
- SAEON Data Portal (catalogue)
- SAEON Observations Database
- SAEON Observations Database WebAPI
- SAGA GIS
- SAGE Global River Discharge Database
- SAIH Guadalquivir (CH Guadalquivir)
- SAIH Spain Real-Time Hydrological Information
- SalishSeaCast ERDDAP (UBC)
- Samoa Meteorology Division
- SANDRE Water Data Management
- Saskatchewan Water Security Agency Data
- Saskatchewan Water Security Agency GeoHub
- SASSCAL Data and Information Portal
- SASSCAL WeatherNet
- Satellite-derived multivariate lake physical variable timeseries for climate studies
- Saudi Arabia MEWA
- Saudi Water Authority (SWA) Open Data Platform
- SBM-Urban Dashboard (Swachh Bharat Mission Urban)
- SCAN Soil Climate Analysis Network (via Ag Data Commons)
- SCCOOS ERDDAP (CalHABMAP harmful algal bloom & water quality)
- Science Data Bank (ScienceDB) - China hydrology datasets
- Scikit-learn
- SciPy
- Scottish Environment Protection Agency
- Scripps Spray Glider ERDDAP
- SeaDataNet Common Data Index (CDI)
- Seasonal Oxygen, Temperature, Chlorophyll and Zooplankton Data: Portage Lake, Minnesota
- SEAWAT
- SEBS Global Land Evapotranspiration
- Secchi Disk Study - Global Ocean Transparency Citizen Science
- SECOORA Data Portal
- SECOORA ERDDAP - Southeast US Coastal Water Quality
- SECOORA ERDDAP (Southeast Coastal Ocean Observing)
- SEED NSW: Directory of Important Wetlands
- SENAMHI Peru - Plataforma Hidrológica PHISIS
- SENAMHI Peru Hydrological Monitoring
- Senegal DGPRE - Groundwater Management Directorate
- Senegal GeoPortal (Esri Africa GeoPortal)
- Senegal River Basin Development Organization (OMVS)
- SenForFlood Global Flood Detection Dataset
- Senorge Norway Water Data
- Sentinel Hub EO Browser
- Sentinel-1 Flood Extent Maps - Pakistan 2022 Floods (TU Wien)
- Sentinel-2 Water Bodies
- Sentinel-6 Michael Freilich Radar Altimetry
- SEPA Time Series Data Service (Scotland river level and flow API)
- Seqwater - Dam Levels (South East Queensland)
- Serbia Hydrometeorological Service
- SERVIR Global
- SERVIR Mekong Water Monitoring
- SEWA-MHWs: Southern Europe and western Asian marine heatwaves dataset
- Shapely
- SHMU Slovak Hydrometeorological Institute
- SI Imaging Services (KOMPSAT Satellite Data)
- SiAR - Spanish Agroclimatic Information System for Irrigation
- SIASAR - Rural Water and Sanitation Information System
- Sierra Leone Data Portal (opendataforafrica)
- SIH3 Bengawan Solo - Hydrology Information System (BBWS Bengawan Solo)
- SIH3 East Java (Jawa Timur) Hydrology Portal
- SIH3 North Sulawesi (Sulawesi Utara) Hydrology Portal
- SILO Australian Climate Data (LongPaddock, Queensland)
- Sindh Irrigation Department - Water Information System
- Singapore MySmartWaterMeter Portal
- Singapore PUB Water Level Sensors Portal
- SM2RAIN-Climate: monthly global long-term rainfall dataset
- SMAP
- SMAP Level 4 Global Soil Moisture v8
- SMAP Soil Moisture NASA
- SMAP-HydroBlocks: A 30 m satellite-based soil moisture dataset for the conterminous US
- SmartAtlantic ERDDAP (Canada)
- SMHI Swedish Hydrology
- SMHI Vattenwebb (Swedish Water Web)
- SMOS
- SMOS Soil Moisture and Ocean Salinity Data (ESA)
- smwrBase
- SNIRH - Portugal Water Resources System
- Snoflo US Streamflow Report (live USGS streamgauge aggregator)
- SO-HYBAM Amazon Observatory (Amazon, Orinoco, Congo)
- SOCAT: Surface Ocean CO2 Atlas
- SoilGrids Depth to Bedrock
- SoilGrids Global Soil Information
- SoilGrids ISRIC
- SoilKsatDB: Global database of soil saturated hydraulic conductivity measurements
- Solomon Islands Meteorological Services
- SONEL: Système d'Observation du Niveau des Eaux Littorales
- South Africa RQIS
- South Asia Network on Dams, Rivers and People (SANDRP)
- South Australia Water Data (Department for Environment and Water)
- South Dakota Observation Well Network
- South Florida Water Management District DBHYDRO Insights
- Southwest Florida Water Management District Hydrologic Data
- Southwest Florida WMD Environmental Data Portal
- SPAM
- Spanish Groundwater Monitoring Networks (MITECO / sig.mapama)
- SpatiaLite
- SPC Pacific Water (WASH)
- SPC Statistics for Development - WASH Indicators
- SPEI Global Drought Database (SPEIbase)
- SPEI Global Drought Monitor
- SRBC Continuous Instream Monitoring
- SRGI Tidal Stations - Indonesia (BIG)
- Sri Lanka Department of Meteorology
- Sri Lanka Disaster Management Centre - River Water Level & Flood Warning
- Sri Lanka Irrigation Department Hydrology & Disaster Management
- Sri Lanka Mahaweli Authority (MASL)
- Sri Lanka Ministry of Irrigation and Water Resources Management
- Sri Lanka Real-time Water Level Monitor (River Monitor SL)
- Sri Lanka Water Research Institute
- SRTM Water Body Data (SWBD)
- SSURGO Portal
- SSURGO Soil Survey Geographic Database
- Stanford Woods Institute Water Data
- State Geological Survey Databases
- Statistics Netherlands (CBS) - Water Use Within the Dutch Economy
- Stats NZ Environment - Freshwater Indicators
- Stats NZ Environmental Indicators - Freshwater
- STATSGO State Soil Geographic Database
- Stream - UK Water Industry Open Data Portal
- Streamflow in the United States: characteristics, trends, regime shifts, and extremes
- Streamflow Occurrence for 182 Sites in the Attert Catchment, Luxembourg (GFZ Data Services)
- Streamflow Water Gauging - Data.Vic
- SU2
- Superwell v1.1 - Global Groundwater Cost and Supply Tool (OSTI)
- Surface Water Quality Dataset 1940-2023
- Surface Water Quality Modeling Training
- SuSanA - Sustainable Sanitation Alliance Library & Project Database
- SuSanA Knowledge Hub / Library
- SUTRA Groundwater Flow Model
- Svenskt Vatten (Swedish Water)
- SWAP
- SWAT
- SWAT Global Database
- SWAT India Soil Dataset
- Swiss Federal Office for the Environment Hydrology Data
- Swiss National Surface Water Quality Monitoring (NAWA)
- Switzerland Federal Water Institute
- Switzerland FOEN Hydro Linked Data Service (LINDAS)
- SWMM
- SWORD - SWOT River Database
- SWORD: SWOT River/Lake Database (UNC)
- SWORD Explorer - SWOT River Database
- SWOT High-Resolution Water Mask Raster
- SWOT Hydrology Data Products (PO.DAAC)
- SWOT Lake Water Surface Elevation
T
- Taiwan EPA Water Quality Monitoring
- Taiwan Government Open Data Platform - Groundwater Level Historical Statistics
- Taiwan River Water Quality Monitoring Data (data.gov.tw)
- Taiwan Water Resources Agency Hydrological Data
- Tajikistan Agency on Hydrometeorology (Tajik Hydromet)
- Tamil Nadu Ground and Surface Water Resources Data Centre
- Tamil Nadu Reservoir Storage Data
- TAMSAT Daily Rainfall Estimates v3.0 (Univ. of Reading)
- TAMSAT Data Access Portal
- TanDEM-X 90m DEM with Water Indication Mask - DLR
- Tanzania Ministry of Water - Hydrological Year Books
- Tanzania Water Institute
- Taranaki Regional Council Environmental Data
- TauDEM
- Taumata Arowai - Water Services Performance (New Zealand)
- TCEQ Groundwater Assessment Data Viewer
- TCEQ Texas Water Districts Map Viewer / iWDD
- Telangana Irrigation Reservoir Storage & Irrigated Area Data
- Telangana State Irrigation and CAD Department Water Data
- Tennessee Valley Authority Water Resources
- TensorFlow
- TerraClimate Global Climate and Water Balance
- Terrestrial evapotranspiration and soil moisture dynamics (1982-2020)
- Tethys Platform
- TexasET Network (Texas A&M)
- TexMesonet (Texas Water Development Board)
- TexMesonet (TWDB soil moisture & evapotranspiration network)
- Thailand Department of Water Resources (DWR) Main Portal
- Thailand DWR GIS Water Resources Management
- Thailand DWR Telemetric Water Monitoring Systems
- Thailand Hydro-Informatics Institute (HII) Data Portal
- Thailand Royal Irrigation Department Big Data Portal
- ThaiWater - National Hydroinformatics Data Center
- Thames Water - Reservoir Levels and Rainfall Figures
- Theia / Data Terra Catalogue - Hydroweb Operational Altimetry River & Lake Water Level
- Theia Catalogue - Sentinel-3 Lake Water Level Demonstration Product
- Theia Catalogue - SWOT Level-2 HR Raster 250m Collection
- Theia Data Terra Catalogue - Hydroweb & Surface Water Products
- Theia Land Data Centre - Water Products
- ThingSpeak
- ThingSpeak IoT Analytics
- Tides Canada - Monthly Water Level Bulletin for the Great Lakes & Montreal Harbour
- Tonga Environment Data Portal (SPREP)
- Tonga Meteorological Service Water Resources Data
- TOPMODEL
- Total irrigation by crop in the Continental United States from 2008 to 2020
- TPDC - China Natural Runoff Dataset CNRD v1.0
- Transboundary Aquifer Database
- Transboundary Aquifers of the World Map 2025 (IHP-WINS)
- Trasformazione Digitale Lombardia: ARPA Lombardia Open Data
- TRMM Archive
- Turf.js
- Turkey DSI State Hydraulic Works
- Turkish State Meteorological Service (MGM) MEVBIS Data System
- TWDB Groundwater Database & Water Data Interactive
U
- U.S. EPA Green Infrastructure Wizard (GIWiz)
- U.S. Indian Health Service (IHS) Sanitation Deficiency System
- UAE Federal Competitiveness and Statistics Centre Open Data
- UAE National Center of Meteorology Water Data
- UFRGS Large Scale Hydrology - South America Simulated River Discharge & Reservoir Dataset
- Uganda Ministry of Water and Environment - Directorate of Water Resources Management
- UHSLC ERDDAP (University of Hawaii Sea Level Center)
- UK Centre for Ecology & Hydrology
- UK Defra Hydrology API
- UK Environment Agency
- UK Environment Agency Flood API
- UK Floods and Droughts Research Infrastructure (FDRI)
- UK Health Security Agency EMHP Wastewater Monitoring
- UK National River Flow Archive (NRFA)
- UK Seafloor Microplastics Data (England and Wales)
- UK Water Framework Database
- Ukraine Water Resources Institute
- Umweltportal Niedersachsen: Water Data Search
- Umweltportal NRW: Hochwasser & Starkregen Information
- UN SDG 6.3.2 Ambient Water Quality Global Data Portal
- UN-SPIDER Knowledge Portal - Space-based Water & Flood Data Sources
- UN-Water SDG 6 Data Portal
- Underground well water level observation grid dataset (2005-2022)
- UNDRR GAR 2025 Flood Data
- UNEP Freshwater Ecosystems Explorer
- UNEP-WCMC Ocean Data Viewer - Global Mangrove Watch
- UNEP/OEOO Microplastic Pollution Map
- UNESCO Global River Discharge Database
- UNESCO IHP-WINS - South Korea Hydrometeorological Data (WAMIS)
- UNESCO IHP-WINS Global Groundwater Quality
- UNESCO Water Sciences Database
- UNESCO-IHP ISARM Programme (Internationally Shared Aquifer Resources Management)
- UNICEF DATA - Water and Sanitation
- UNICEF MICS (Multiple Indicator Cluster Surveys) Data
- United States Water Withdrawals Database
- University of Montana NTSG - MODIS Global Evapotranspiration (MOD16)
- UNOSAT Flood Portal
- UnTRIM
- UP NOAH Hazard Data (UP Resilience Institute)
- Urban Water Demand Database (AQUASTAT/UN-Habitat)
- Uruguay Observatorio Hidrológico Nacional (DINAGUA)
- US Drought Monitor (USDM)
- US Groundwater Well Database
- US Wastewater Treatment GHG Emissions
- US Water Quality Portal (WQP)
- US-CoastEX: Probabilistic reanalysis of storm surge and sea level extremes for the United States
- USACE CWMS Data (RADAR) Public Services
- USACE CWMS Data API (CDA) - Public Water Resources Data
- USACE Great Lakes Daily Water Levels
- USACE HEC Data Storage System
- USACE Jacksonville District Water Management Dashboard
- USACE National Inventory of Dams (NID)
- USACE National Levee Database (NLD)
- USACE Rivergages.com
- USACE Sacramento District Water Control Data System
- USACE Water Data Portal
- USBR Lower Colorado River Operations: Reservoir Levels
- USDA Climate Hubs SWAT Tools
- USDA Crop Frequency Layer
- USDA Geospatial Data Gateway
- USDA NASS CropScape CDL
- USDA NASS Quick Stats
- USDA NRCS Web Soil Survey
- USDA PLANTS Database
- USFWS National Wetlands Inventory - Seamless Data Download
- USFWS National Wetlands Inventory: Wetlands Mapper
- USGS 3D Hydrography Program
- USGS 3DEP LiDAR
- USGS Arsenic Concentrations in Groundwater of the United States
- USGS EarthExplorer
- USGS Estimated Nitrate and Arsenic in SW US Basin-Fill Aquifers (SIM 3234)
- USGS Flood Information
- USGS Groundwater Best Available Time Series
- USGS Groundwater Data for the Nation
- USGS GWAVA Nitrate Contamination Model
- USGS Instantaneous Values API
- USGS Long-term Water Quality Trends
- USGS LP DAAC (Land Processes DAAC)
- USGS Microplastics in Great Lakes Tributaries
- USGS Microplastics in Northeastern US Streams
- USGS Milwaukee Area / Lake Michigan Microplastics
- USGS MODFLOW and Related Programs
- USGS National Map Data Downloads
- USGS National Water Quality Network
- USGS National Water-Quality Assessment (NAWQA) Pesticide Database
- USGS NAWQA National Water-Quality Assessment Trace Elements
- USGS Peak Flow Database
- USGS PFAS in U.S. Tapwater Study
- USGS Publications Warehouse
- USGS Real-Time Water Quality
- USGS ScienceBase Geospatial
- USGS SSEBop Global Evapotranspiration
- USGS StreamStats
- USGS VegDRI Vegetation Drought Response Index
- USGS Water Data
- USGS Water Data for the Nation
- USGS Water Data OpenAPI
- USGS Water Services API
- USGS Water Use Data
- USGS WISP - What is SWOT (Surface Water Mission Portal)
- Utah AgWeather Network (Utah Climate Center)
- Utah Open Water Data
- Uttar Pradesh Irrigation and Water Resources Department Portal
- Uttar Pradesh Jal Shakti Portal
- Uzbekistan Hydrometeorological Service (Uzhydromet)
V
- Vannmiljø - Norway Water Quality Database
- Vanuatu Climate Futures Portal
- Vanuatu Environment Data Portal (SPREP)
- Vanuatu Meteorology and Geohazards Department
- VEDAS - ISRO Space Applications Centre EO Data & Archival System
- Veðurstofa Íslands Hydrology
- VegDischarge v1 African River Discharge
- Venezuela INAMEH - National Institute of Meteorology and Hydrology
- VENG Satellite Information - SAOCOM Soil Moisture Ambient Maps
- Vermont DEC - Lakes and Ponds Monitoring Data
- Vewin - Association of Dutch Water Companies
- VIC
- Victoria Water Measurement Information System (WMIS)
- Victorian Government Data Directory - Water Storage Levels
- Vietnam MONRE Portal
- Vietnam National Centre for Hydro-Meteorological Forecasting (NCHMF)
- Vietnam Water Portal
- VIIRS Snow Cover Daily Global 375m
- Virginia Environmental Data Hub
- Virtual water trade and water footprint of agricultural goods: the 1961-2016 CWASI database
- VisIt
- Visualising Victoria's Groundwater (VVG)
- Visualising Victoria's Groundwater (VVG) - Australia
- VITUKI Hungary Water Research Institute
- Voice of the Ocean ERDDAP (Baltic gliders)
- Volta Basin Authority (VBA)
- Volta Basin Authority Observatory
W
- W-SPHERE Global Wastewater SARS-CoV-2 Repository
- W5E5 v2.0 Climate Forcing (GFZ Data Services)
- WA Water Information Reporting (WIR)
- Waikato Data Portal
- Waikato Regional Council Environmental Data Hub
- Wami/Ruvu Basin Water Resources Data (Tanzania Ministry of Water)
- WAMIS - Water Management Information System (South Korea)
- WAREG - European Water Regulators KPI Reports
- WASCAL Data Discovery Portal (WADI)
- WASH data Sierra Leone
- WASH Health Data Exchange (WHdx)
- WASH-Liberia Water Point Data
- Washington Ecology Freshwater DataStream
- Washington Ecology Water Quality Atlas
- Washington Environmental Information Management (EIM) Database
- WASP
- WASREB - Kenya Water Services IMPACT Reports
- WastewaterSCAN
- Water Action Hub - WASH Country Access Data
- Water and Land Resource Centre Ethiopia (WALRIS / WLRC)
- Water Budget Tool
- Water Data for Texas (TWDB)
- Water Data Online (Australia BoM) - data.gov.au
- Water Footprint Network Data
- Water footprints and crop water use of 175 individual crops for 1990-2019
- Water Information System Tasmania (WIST)
- Water Information Tasmania (NRE Tasmania)
- Water Knowledge Hub (GWP)
- Water Observations from Space (WOfS) - data.gov.au
- Water Office Canada
- Water Point Data Exchange (WPDx)
- Water Point Data Exchange (WPDx) Data Portal
- Water Quality Analysis for the River Chess (OSF)
- Water Quality Data Download EPA
- Water Quality from the Main Channel of a 6th-Order Stream (Des Moines River, Iowa)
- Water Research Journal Archive
- Water Resources Data Center - PhilSensors (DOST-ASTI Philippines)
- Water Resources Data Center / WRDC - Indonesia One Map (BIG Geoportal)
- Water Resources of South Africa 2012 Study (WR2012)
- Water Resources Research Journal
- Water Use on Australian Farms (ABS)
- WaterConnect (South Australia)
- Waterkwaliteitsportaal Netherlands
- WaterLevel.ie Ireland
- WaterML
- WaterNSW - Water Storage & WaterInsights
- WaterNSW Surface Water Data API
- Waterplan Water Risk Platform
- waterquality
- WaterSense Calculator
- Watershed Classification: Streamflow Regime and Organic Carbon Dynamics, NE Pacific Coastal Temperate Rainforest (Dryad)
- WEAP
- Weka
- Wellington Water Open Data Portal
- West Bengal Water Resources
- Western Australia Department of Water and Environmental Regulation Data
- Western Australia Groundwater Datasets (data.wa.gov.au)
- WGMS dbgate: Glacier relational database browser
- Whitebox GAT
- WHO GLAAS Portal
- WHO Global Health Observatory - WASH Indicators
- WHO Water, Sanitation and Hygiene Monitoring Publications
- WHO/UNICEF JMP Database
- WHYCOS HYCOS Projects (WMO HydroHub)
- WHYMAP
- WHYMAP Interactive Map Viewer (BGR)
- Wisconsin AgWeather Evapotranspiration Data
- Wisconsin DNR Groundwater Retrieval Network (GRN)
- Wisconsin Groundwater-Level Monitoring Network (WGNHS)
- Wisconsin SWIMS - Surface Water Integrated Monitoring System
- WISE Water Accounts Europe
- WISE Water Information System for Europe
- WMO Hydrological Observing System (WHOS)
- WMO HydroSOS Global Hydrological Outlook
- WMO WIS2 Hydrological Data Exchange
- World Bank Water Data Portal
- World Glacier Monitoring Service - Global Glacier State (Central Asia)
- World Glacier Monitoring Service: Fluctuations of Glaciers (FoG) Database
- World WASH Data - Humanitarian Data Exchange (HDX)
- WorldCereal: Global seasonal crop and irrigation mapping at 10 m resolution
- WorldClim CMIP6 Future Climate
- WRC South Africa
- WRF-Hydro
- WRI Aqueduct 4.0
- WWF: Global Lakes and Wetlands Database (Small Lake Polygons L2)
- Wyvern Hyperspectral Open Data