The U.S. Government is closed. This site will not be updated; however NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit www.commerce.gov. For the latest forecast and critical weather information, visit www.weather.gov. 

The U.S. government is closed. This site will not be updated; however, NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit commerce.gov. 

For the latest forecasts and critical weather information, visit weather.gov.

The cyanobacteria bloom in western Lake Erie has an approximate area of 340 square miles

Current Lake Erie Sentinel-3 satellite imagery from the Ocean and Land Color Imager (OLCI) showing bloom location and extent in the western basin on September 2, 2025. The cyanobacteria bloom in western Lake Erie has an approximate area of 340 square miles. The bloom extends from Maumee Bay, OH north to Stony Point, MI, and east to Port Clinton, OH, with bloom patches extending to the Lake Erie Islands. Never miss an update, subscribe to the Lake Erie HAB bulletin today – https://coastalscience.noaa.gov/science-areas/habs/hab-forecasts/lake-erie/