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Blue-green algae found in Carver Lake

Updated Tuesday, Sept. 5:
The City of Woodbury completed toxin testing on Carver Lake water samples during the last week of August as a result of a blue-green algal bloom. The results showed very low levels of toxins commonly produced by blue-green algae. While the results provide information on the previous bloom, it is not possible to predict future blue-green algal blooms nor if the blooms will produce toxins.

The Carver Lake Beach is closed for the season and will reopen as usual in the spring. 

The Minnesota Pollution Control Agency offers the following recommendations to lake users:

  • People and animals should avoid contact with water with blue-green algae. 
  • Watch for signs of recent blooms, such as green scum on the shoreline. When in doubt, stay out!
  • If you or your pet go into water where there may be a bloom, wash off with fresh water immediately afterwards.
Original post

The Ramsey-Washington Watershed District confirmed the presence of blue-green algae in Carver Lake Friday, Aug. 25. The type of blue-green algae present is known to produce toxins that can be harmful to pets and humans.

Not all blue-green algal blooms produce toxins; however, there is no way to predict if or when a bloom will produce toxins. For this reason it is best to avoid contact and stay out of the water.

If you believe you or your pets are experiencing adverse health effects due to contact with, or ingestion of, lake water or algae, seek medical attention immediately.

The following Minnesota Pollution Control Agency (MPCA) and Minnesota Department of Health (MDH) fact sheets include photos and more information about blue-green algae:

For more information, contact Sharon Doucette, environmental resources coordinator, at or (651) 714-3538.