The Satellite-based analysis Tool for Rapid Evaluation of Aquatic EnvironMents (STREAM) offers globally validated water quality products to facilitate the effective use of NASA/USGS and the Copernicus satellite observations (i.e., Landsat-8/9 and Sentinel-2A/B) for water resource management. Leveraging various NASA-supported R&D efforts, STREAM combines cutting-edge same-day water quality estimation with an easy-to-use, responsive web interface. The processing engine of STREAM is enabled by a rigorously validated machine-learning processing chain (including atmospheric correction and in-water retrievals) to approximate water quality indicators, such as water transparency and concentrations of chlorophyll-a and total suspended solids. The web interface allows end-users to visualize water quality maps, identify pixel values, and view time-series plots for a given pixel or a group of pixels (e.g., lake or its sub-basin). STREAM already enables low-latency (< 6 hours) detection of anomalous water-quality conditions for select regions and water bodies and will continue to expand operations as capable. Additionally, a RESTful API allows users to request product maps directly or query for more information. The system is open to the public (https://ladsweb.modaps.eosdis.nasa.gov/stream/) and has conducted daily processing since June 2024. These tools enable rapid insight into emerging water quality changes.