The Ontario County Health Department says blue green algae has been spotted in both Canandaigua and Honeoye Lakes. They say swimming has been closed at Deep Run Beach in Gorham and Onanda Park Beach in Canandaigua as a result.
Sandy Bottom Beach on Honeoye Lake has also been closed for the season because of the algae blooms.
Blue green algae blooms occur during hot weather, and some forms produce toxins that pose health risks to people and animals including dogs and cats. Symptoms can include allergic reactions, plus eye nose and throat irritation. It's generally safe to boat or swim in areas without visible algae, but if it looks like a scum of paint on the surface, stay away.