Though the investigation stopped short of definitively linking the symptoms to the water source, it found based on water tests and surveys of medical diagnoses that resident concerns were valid. The investigation by federal and state agencies, including the US Centers for Disease Control and Prevention as well as the US and Michigan departments of health and human services, analyzed water quality data from April 2014 to October 2015, the time frame when Flint’s water supply was sourced from the Flint river, a water source later deemed to be corroding pipes and leaching lead into the water.

Flint’s tainted water may have led to rashes and hair loss, investigation finds