Chlorophyll-a concentration from the high-resolution (20m) Sentinel-2 Multispectral Imager
Maumee Bay, OH
Apostle Islands, WI
Saint Louis River, MN
Maumee Bay, OH
Images last updated:
Images last updated: 04/13/2026
Click the next and previous arrows to view the most recent 9 usable images from the last 30 days.
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Apostle Islands, WI
Images last updated: 04/19/2026
Click the next and previous arrows to view the most recent 5 usable images from the last 30 days.
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Saint Louis River, MN
Images last updated: 04/18/2026
Click the next and previous arrows to view the most recent 6 usable images from the last 30 days.
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The images were derived from Copernicus Sentinel-3 satellite data from the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) and were processed by NOAA, National Centers for Coastal Ocean Science.
NOTE: Image quality will vary with clouds and satellite position (OLCI satellite background information). See more information about our bloom monitoring imagery.