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Posted on: July 15, 2022

Blue-Green Algae Warning Issued for Lake Cornelia

The Nine Mile Creek Watershed District has issued the following notice regarding Lake Cornelia:

Warning: The public should avoid contact with the water in Lake Cornelia, Edina. The water contains blue-green algae at levels that may cause short-term and long-term harm including skin irritation, gastrointestinal problems, and/or liver damage. People and pets should avoid all contact with the water, scum, or algae.

Analysis of most recent water samples that the District took from Lake Cornelia indicate blue-green algae numbers that exceed the World Health Organization (WHO) threshold for low probability of adverse health risks from algal toxins.

WHO provides threshold guidance for the probability of adverse health risks related to blue-green algal counts for “little, if any”, “low”, “moderate”, or “high” probabilities of adverse health risks for people or pets.

Blue-green algae are a concern because this type of algae can produce algal toxins, which can pose a health threat for pets and people when concentrations become high enough. 

See the full announcement for more information.

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