The province is warning Manitobans to avoid the water at Ninette Beach, on northern Pelican Lake, after high levels of toxic algae were discovered last week. The concentrations of microcystin — an algal toxin that can be harmful to the liver or nervous system if large amounts of water are swallowed — at the southwestern Manitoba beach were "well above the recreational water quality objective," according to Manitoba's latest weekly beach conditions report, which was issued Friday.