Dept of Health & Human Services (DHHS)

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Blue-Green Algae

Blue-Green Algae has been reported, although not confirmed, at lakes in Walworth County. The algae may cause severe illness in those exposed. However, not all types of algae cause illness. The easiest way to avoid those that do is to avoid swimming in areas when there are abundant amounts of algae. The same goes for pets.


Report Algae Related Illness

Harmful Algae Blooms

Pictures of blue-green algae blooms


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