NASA STREAM Water Quality Maps
Interactive tool providing 20-30m resolution water quality maps (chlorophyll-a, Secchi depth, TSS) with less than 6-hour latency from satellite acquisition.
ladsweb.modaps.eosdis.nasa.gov
At a glance
- Region
- Global
- Coverage
- Continental U.S. and select global regions
- Access
- Free
- Category
- Space Agency
- Last updated
- 2025
What's inside
- Water Quality
- Chlorophyll-a
- Turbidity
Terms explained
What you can do with it
Typical work that data of this type supports.
- 01
Hotspots and trends
Find where contamination is high and whether it is getting worse.
Because it has: Water Quality
- 02
Compliance checks
Compare samples against drinking water and discharge standards.
- 03
No-gauge areas
Monitor places with no ground stations.
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Risk maps
Predict contamination where no samples exist, from geology, land use and climate.
- 02
Anomaly alerts
Catch sudden spikes in sensor or lab data automatically.
- 03
Segmentation
Map water, crops and land use pixel by pixel with deep learning.
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- Copernicus GlobColour Ocean BiogeochemistryGlobal | Free
- Copernicus Lake Water Quality 300m (Sentinel-3 OLCI)Global | Free
- FreshWater Watch (Earthwatch)Global | Registration Required
- GEO AquaWatchGlobal | Free
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