STREAM
Monitor water quality with high-resolution satellite imagery to support timely decision-making
Real-Time Monitoring
Visualize water quality maps over inland and coastal waters with less than 6-hour latency from satellite acquisition.
View MapHigh Resolution
Access water quality maps at 20-30 meters spatial resolution from Sentinel-2 and Landsat 8/9 imagery.
Search TilesHigh Accuracy
We leverage cutting edge neural networks trained on in-situ data from around the globe to ensure high quality results.
Browse ArchiveAbout STREAM
Innovative Water Quality Monitoring
STREAM is an expedited image processing service that ingests and processes satellite observations to generate water quality maps, including chlorophyll-a (Chla), Total Suspended Solids (TSS), and Secchi Disk Depth (Zsd), at 20–30 meters spatial resolution.
The system utilizes Copernicus Sentinel-2 and USGS Landsat 8 and 9 imagery with coverage across continental U.S., Peru, Uruguay, Senegal, Benin, Togo, Ghana, Uganda, Kenya, and Tanzania.
Supporting Global Sustainability
In partnership with the United Nations Environment Program, STREAM plays a pivotal role in consistent monitoring and reporting of Sustainable Development Goal 6 (indicator 6.3.2) under the United Nations 2030 Agenda.
Backed by NASA's Applied Sciences and various Research and Analysis programs, NASA Goddard Space Flight Center and Science Systems and Applications Inc. (SSAI) have been collaborating since 2018 to establish this system, demonstrating our commitment to global environmental sustainability.
How to Use STREAM
Watch our tutorial video to learn how to effectively use STREAM's features for water quality monitoring and data analysis.
Latest Updates
Full CONUS Landsat coverage
Full CONUS coverage is now available for Landsat 8&9! The API document also features a new example python script.
Map Page Enhancements
Faster and more responsive web map featuring new tools like a location search box and selectable color palettes!
STEAM Overhaul
STREAM gets an overhaul! Bringing you a fresh new look and new features like multiple layers on the map.
Coming Soon
We're continuously improving STREAM. Here are some exciting features currently in development:
Time Series Analysis
Track changes in water quality over time with advanced analytical tools.
RGB/Full Color Maps
True color visualizations for more intuitive interpretation.
Uncertainty Estimation
Advanced metrics for data reliability assessment.
Historical Data
Back-catalogue of data starting with early 2024 and 2023.
Need Help?
This is a tool that is early in development. If you encounter any issues or have suggestions for improvement, please let us know.
Known Issues
- Daily processing may stall over weekends/holidays but this is rectified as soon as possible
- Sentinel scenes with high cloud cover may produce stripy artifacting. This is something we're working to address.