Harmful algae blooms detected at Ennis Lake – advisory issued
By Moosetrack Megan

Posted: September 1, 2022

Bozeman, Mont. – Sept. 1, 2022– Harmful algae blooms (HAB) are present along the Kobayashi Beach and other areas of the north shore of Ennis Lake, west of Madison Dam. Routine monitoring and field testing in the Kobayashi Beach and Meadow Lake Campground areas have detected the presence of an algal toxin, Anatoxin-a, that poses a risk to people, pets, and livestock.

Ingestion or prolonged contact with the algal bloom may result in illness, with signs such as muscle twitching, staggering, convulsions, paralysis and death. Importantly, children and pets are more likely to ingest HAB infested waters because they spend most of their time wading in the shallow waters where algae can accumulate, and they have less control over how much water they ingest. Animals and livestock that drink large amounts of contaminated water, and pets that collect scum on their fur and then ingest it by licking, are at high risk of toxin exposure. Toxin exposure can occur in humans from recreational activities where water might be ingested such as swimming, wind surfing, jet skiing, and water skiing.