Photo - Ohio Air National Guard Senior Airman Nick Wander fills a 400 gallon military water buffalo with fresh drinking water, Sunday, Aug. 3, 2014, at Woodward High School in Toledo, Ohio. More tests are needed to ensure that toxins are out of Toledo's water supply, the mayor said Sunday, instructing the 400,000 people in the region to avoid drinking tap water for a second day. Toledo officials issued the warning early Saturday after tests at one treatment plant showed two sample readings for microsystin above the standard for consumption, possibly because of algae on Lake Erie. (AP Photo/Haraz N. Ghanbari)