The city of Toledo in Ohio has issued an advisory to warn more than 400,000 residents in the city and nearby not to drink the drinking water from the public water system as two water sample samples from one water treatment plant were found to contain microsystin, a toxin that is produced by algae on Lake Erie, at a level that is higher than the standard for consumption.

http://news.yahoo.com/dont-drink-water-says-4th-largest-ohio-city-190516575.html