The Village announced on April 24 that it has contracted with ILM to begin the third and final year of a whole-lake herbicide treatment at Bangs Lake, aiming to control non-native Curly Leaf Pondweed. The treatment is scheduled to start on April 29, 2026.
This ongoing effort is important as it addresses the spread of invasive aquatic plants that can disrupt the lake’s ecosystem. Invasive species like Curly Leaf Pondweed and Eurasian Milfoil can outcompete native plants, affecting water quality and recreational use.
According to the Village, initial treatments began in March 2024, focusing on both Eurasian Milfoil and Curly Leaf Pondweed using an herbicide called SONAR. Monitoring by ILM showed positive results over the first two years, with a decrease in non-native species and an increase in native vegetation. Last fall, monitoring at 15 locations indicated reduced presence of Eurasian Milfoil. On April 17, inspections at 50 sites found no sign of this invasive plant.
Since Curly Leaf Pondweed remains present in some areas, ILM recommended targeting it specifically with Galleon SC for this year’s treatment season. This approach allows for a lower concentration application over a shorter period. The only restriction during this process will be a 30-day irrigation ban for crops and ornamentals; otherwise, there are no limitations on lake use.
More information about the treatment process, water quality test reports, and updates are available through the Bangs Lake Management webpage or by contacting the Public Works Department at (847) 526-9610.
The broader impact of these efforts aims to restore balance in Bangs Lake’s ecosystem by reducing invasive plants while supporting native species growth.
