In regards to the Flint water crisis, the switch to getting water from the Flint River versus Lake Huron was done when Flint was under an
emergency manager appointed by Snyder. Snyder himself said that he was ultimately responsible because the city did not have the power to go against the emergency manager's decision.
On top of that, the governor acted very slowly and inadequately to the situation in Flint, and he tried to justify that by possibly lying during his testimony by claiming that he didn't know there was a crisis until considerably later than when at least one of his appointees said when they told him. And then, instead of jumping in and coming to the aid of Flint, they just dragged their feet day in and day out for months, with inadequate supplies of bottled water, which in most cases weren't delivered because Snyder didn't send enough personnel in.
Anyhow, the FBI investigation continues, at least as far as I know. Meanwhile, two Snyder appointees have been removed and indicted, one EPA consultant had to resign, and one city official also has been indicted.
BTW, the lead pipes in the Lansing area, where the capitol is, were removed many years before-- but not in Flint. A civil rights commission concluded that racism was part of the cause.
For further information, here:
Flint water crisis - Wikipedia This source also includes the time-line and also various legal actions, including those now in progress.
Anyhow, since this is not what the OP is about, this will be my last post on this side-bar.