Cedar Lake beaches closed due to toxic algae outbreak

In Minneapolis, the Minneapolis Park and Recreation Board has closed all three beaches at Cedar Lake due to a hazardous algae warning. A water test revealed the presence of toxic blue-green algae, prompting officials to advise against swimming. The bloom is expected to shift around the lake based on weather conditions, and similar closures have occurred at other beaches in the area due to E. coli contamination.

Cedar Lake beaches closed due to toxic algae outbreak
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environment Published Aug 8, 2026

Topic overview

In brief

  • The Minneapolis Park and Recreation Board issued a hazardous algae warning for all three beaches at Cedar Lake.
  • Blue-green algae can be toxic to people and animals, prompting the city to advise against swimming.
  • The closures reflect ongoing concerns about water quality and public safety in local lakes.

Summary

In the United States, specifically in Minneapolis, the Minneapolis Park and Recreation Board has taken precautionary measures by issuing a hazardous algae warning for all three beaches at Cedar Lake. This decision was prompted by a water test at Cedar Lake South Beach that indicated the presence of blue-green algae, which can be toxic to both humans and animals. The board has advised the public to avoid swimming in the lake due to the potential health risks associated with the algae. The situation is further complicated by the fact that the blue-green algae bloom is expected to shift around the lake, influenced by weather and wind conditions.

The blue-green algae blooms are a result of the summer weather conditions, particularly when water temperatures exceed 75 degrees Fahrenheit and there is ample sunshine. These conditions create an ideal environment for the algae to proliferate rapidly, leading to the formation of blooms that can appear as green, pea soup-like substances or even brown and rust-colored patches in the water. The Minneapolis Park and Recreation Board has emphasized the importance of public safety in their decision to close the beaches, as the health risks associated with exposure to blue-green algae can be significant.

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Updated Aug 8, 2026

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