The City of Bloomington is warning anyone planning a visit to Griffy Lake in the coming weeks to take precautions because of an algae bloom. The parks and recreation department received a report identifying the bloom this week.

According to a press release, the bloom contains a type of blue-green algae that is common in freshwater environments and releases toxins into the water. The algae is common in warm, still water with plenty of sunlight.

Parks and Recreation Natural Resources Manager Steve Cotter says while fish caught in the water are still safe to eat, visitors should keep pets out of the water. He says to keep them on a leash, as the toxins may make them sick.

“For humans it’s not as dangerous as some of the other types of algae,” Cotter says. “But if people were to drink the water, which of course is not recommended, they could become sick.”

Swimming is not permitted in Griffy Lake, but recreation like boating can bring some visitors into contact with the water.

Cotter advises visitors to wash any skin that comes into contact with lake water with warm water and soap. He says the bloom may dissipate as the weather gets colder, but could still last for a few weeks.