The Lenawee County Health Department (LCHD) has been notified by the Michigan Department of Natural Resources (DNR) of a suspected harmful algal bloom (HAB), also known as blue-green algae or cyanobacteria, at Lake Hudson.
On August 31, 2025, DNR staff observed a possible HAB along the shoreline of the public swimming beach of Lake Hudson. Based on the appearance and color of the algae, the DNR has determined that the bloom may be harmful. To protect visitors, the DNR immediately posted signs at the beach to inform swimmers and beachgoers of the potential risk.
Harmful algal blooms can pose health risks to both people and animals. LCHD advises residents and visitors to avoid contact with water that appears discolored, has surface scum, or emits a foul odor. Clear areas of the waterbody may still be safe for recreational use; however, individuals should avoid any areas where the bloom is visible for as long as it persists…