The Nebraska Game and Parks Commission says the state’s Department of Environmental Quality tested the water last week, which showed high toxin levels.
Visitors to Willow Creek State Recreation Area should avoid full body contact activities such as swimming, wading and skiing. Non-contact activities such as boating, fishing and camping should be safe. Dog owners are urged to keep pets out of the water and not let them drink lake water.
Lakes with beaches and those that allow power boating are tested weekly through the summer months. Health alerts are lifted when algal toxin levels are below advisory concentration for two consecutive weeks.