. >> joining our discussion now from toledo, ohio, christine meyer, professor of ecologically at the university of toledo's lake erie center. welcome to the program. have you had a glass of water yet? >> i have, i have, good toledo tap water. >> was there any second thoughts when you opened up the tap? was there recommendation that you let it run for a while? >> yes, there was. the city of toledo has posted information for people to tell them to let them let their taps run for a time and flush out the water and that the toxins have gotten out of the system. and hopefully every is getting that information. >> what is the threat and how does it get into the water. >> it's the chemical that blue-green algae, which are tiny, tiny organisms that live in fresh water, it's something that the algae cells produce. if you're a tiny algae cell there are things trying to eat you. so the algae produce this chemical as a defense. when the algae builds up, it's not truly an algae. it's a kind of bacteria. when those cells build up in the water, when they break down they release the cells in the wat