Plants that grow in and around water can have an impact on the long-term health of our area lakes. For this reason, the MPRB completes aquatic plant surveys on Minneapolis lakes every two to three years. These surveys document the increase or decline in different species of aquatic plants.

For detailed information on milfoil results, see the MPRB Water Resources Report.

Targeting a Nuisance:
Eurasian Watermilfoil

Eurasian watermilfoil is a plant of special concern to our lakes. This non-native plant creates all kinds of problems when it invades the water. Eurasian watermilfoil:

• Out-competes native plants
• Diminishes the habitat and food source for fish and other organisms.
• Forms dense mats that interfere with boating and swimming.
• Reduces the overall aesthetic appeal of lakes.

Harvesting is currently the best management option that the MPRB has to control Eurasian watermilfoil. A special boat, known as a harvester, removes plants that are in the top six feet of water. This temporarily allows for trouble-free boating and swimming. Harvesting is done primarily in swimming areas, boat launches and in shallow areas where dense growth occurs.