The managers are the ones who handle water treatment? Switching from detroit water to flint river water was perfectly safe, if phosphate levels and/or ph was ma

The managers are the ones who handle water treatment? Switching from detroit water to flint river water was perfectly safe, if phosphate levels and/or ph was matched (or other approaches to manage the protective layer of minerals inside lead service lines). Detroit ends it's contract with flint, flint moves to water from the flint river, change in water chemistry has disastrous effects (not just lead). Are you saying instead of engineers screwing up the water treatment (failing to match new water to old) the city managers told them to let the water chemistry change? Do you have any evidence of that?