Lake Minnetonka Conservation District - To protect and preserve Lake Minnetonka



Common Topics/Resources

The LMCD receives many questions about the environment, safety, and concerns related to Lake Minnetonka. The following are some the the most common questions and some resources that you may find helpful.

Algae, Slime, and Blue-Green Algae

Many of the algal blooms are not harmful and more of nuisances. However, the blue-green algae (a bacteria) can become harmful to people and pets. The following resources provide information about the most common types of algae and how to identify them.

Hydraulic Water Jets

Hydraulic water jets, if used properly, are allowed to move water. However, it is illegal if the water jets uproot aquatic plants or move sediment. It is also important that property owners use them so they do not create nuisances for the neighbors. The MN DNR provides information about potential impacts if used improperly.

Public Swimming Beach Closures

Each summer, Hennepin County Public Health samples and analyzes the water at 31 public swimming beaches to help ensure it is safe for swimming. Some of these beaches are located on Lake Minnetonka. The county has the authority to close beaches that are determined to be contaminated and work with the cities regarding public notification. A map that shows the various beaches and status is provided on the Hennepin County website at If a beach is closed, questions may be directed to the listed city.

Lake Minnetonka Conservation District
5341 Maywood Road, Suite 200, Mound, MN 55364
Phone: 952 / 745-0789    Fax: 952 / 745-9085    Email:
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