Minneapolis

Bloomington Officials Warn of Blue-Green Algae Risks at Penn Lake, Urge Public to Exercise Caution

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Published on July 29, 2025
Bloomington Officials Warn of Blue-Green Algae Risks at Penn Lake, Urge Public to Exercise CautionSource: City of Bloomington

The placid waters of Penn Lake have recently turned worrisome as local environmental officials have confirmed the presence of blue-green algae bloom, known to scientists as cyanobacteria, which carries potential health risks for humans and animals alike.

Residents in the vicinity and those who frequent Penn Lake for its recreative charm are advised to exercise caution; direct contact with lake water that takes on a green hue, or emanates a scummy appearance or foul odor should be strictly avoided, this cautionary message is especially pointed when you consider that children and pets are at heightened risk and could experience skin irritation, nausea, or more serious effects if they ingest the tainted water, therefore, it is vital to keep pets from drinking or entering the lake and ensure everyone rinses off immediately with clean water after any contact with the lake, as per the City of Bloomington.

In a statement garnered by the City of Bloomington's official website, officials have urged the public to abide by specific guidelines to keep safe during this environmental hiccup, which includes keeping pets out of the water and preventing them from drinking from the lake, rinsing off with clean water should contact occur, and of course, avoiding the lake water if it presents any signs of the algae bloom.

More detailed information and ongoing updates on the situation at Penn Lake can be found on the Nine Mile Creek Watershed District’s alert page, this resource serves as a hub for the community to stay informed and engage in preventive measures as they enjoy the local natural resources, meanwhile scientists and environmentalists work assiduously to monitor the bloom and mitigate its impact on the lake's ecosystem and its visitors.