Flint Water Crisis
http://edition.cnn.com/2016/01/18/us/flint-michigan-water-crisis-five-things/
https://en.wikipedia.org/wiki/Flint_water_crisis
Back in April 2014, the city of Flint switched to the Flint River as their primary source of tap water. People complained that it looked, smelled, and tasted differently. Studies in early 2015 found out that the water from the Flint River is highly corrosive, causing lead from the water pipes to leak to the water supply. It is estimated about 6000-12000 people were poisoned by drinking the contaminated tap water.