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News items produced by the City of Eden Prairie Communications Division are intended for members of the news media and the community at large.

Heat Brings Back Blue-Green Algae

Post Date:July 20, 2019

Harmful Algal BloomsBlue-green algae are a type of bacteria present at low levels in many Minnesota lakes and ponds. When water is stagnant, warm and rich in nutrients — especially phosphorus — bacteria can grow quickly, forming what are called “blooms.” These blooms typically look like pea soup or bright green paint. They can also produce a strong, swampy odor as the bacteria breaks down.

Not all blue-green algae are harmful, but there is no way to determine if a water body is toxic just by looking at it. If there is algae visible in a body of water or if the water clarity is less than 3-feet deep, it is best to be cautious and avoid contact. Pets are particularly susceptible because they tend to swallow more water than humans while swimming. It is always a good practice to shower or rinse off after wading or swimming in lakes.

Minnesota Pollution Control Agency Information About Blue-Green Algae

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