TT comment July 14 2015 http://toledo.oh.gov/services/public-utilities/water-treatment/water-quality q. Our water is safe to drink. We have not detected microcystin in Lake Erie or the tap water. q.. !http://toledo.oh.gov/media/179498/Dashboard-CLEAR_768x292.jpg! https://twitter.com/City_of_Toledo Unsure if related ... July 9 city of Toledo "tweets":https://twitter.com/city_of_toledo/status/619244583952580608 q. Powdered Activated Carbon and Potassium Permanganate are added during "ramped" up treatments. They're added at quadruple the rate, but only during those "ramped" up treatments. Treatment is normal now. q.. On July 11, someone "tweeted":https://twitter.com/cgail/status/620030550678609920 at the city: q. what is the oily film on the water? It also has a smell with it. New the last couple of days. q.. It appears that the city did not answer the question at that time. On Thu, Jul 9, the Toledo area experienced very heavy rainfall.