News Leonard Lake under Blue-Green Algae Bloom Advisory SHARE ON: Doug Crosse, staff Saturday Sep. 15th, 2018 Courtesy MyCowichanNow.com There is another report of blue-green algae, this time on Leonard Lake in the Township of Muskoka Lakes. The Simcoe Muskoka District Health Unit (SMDHI) is advising users of the lake to be cautious as signs of a blue-green algae bloom can migrate around a lake, giving the appearance of no problems, but leaving behind the toxins that can harm people and animals. Residents are asked to avoid swimming or playing in the water, use it for cooking, bathing, or eating fish caught from the lake. Boiling the water will not eliminate the toxins. Symptoms of contact with toxic water from a bloom included headaches, fever, diarrhea, abdominal pain, nausea, and vomiting. The health unit will continue to test the lake until signs of the bloom are completely eliminated.