Eden Prairie City News

Press Enter to show all options, press Tab go to next option

Contact Us    Subscribe to CITY NEWS

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

Blue-Green Algae Alert

Post Date:September 08, 2016

Blue-green algae bloomOn Wednesday, Sept. 7, the Minnesota Pollution Control Agency (MPCA) and Minnesota Department of Health (MDH) collected and analyzed water samples from a small bay on the west side of Riley Lake in Eden Prairie in response to a report of a dog becoming ill after swimming in the lake the previous weekend. Test results confirmed the lake did experience a harmful blue-green algae bloom.

Blue-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 waterbody 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.

Click on the following links for more information from the MDH and MPCA about blue-green algae and how to report potential blooms.

Blue-green algae: If in doubt, stay out

Blue-green algae and harmful algal blooms

Return to full list >>