Turning off the faucets would have generated bad press. Leaving them on certainly did too. 
There are issues for which simple apologies are not enough - our children's health being one. 
It's one thing as a district to struggle with academic achievement, however it's  totally unacceptable to subject children to known health hazards. The PPS board and Super have much work ahead to restore confidence they can keep kids safe and at the same time educate them. 
Jez, didn't they learn anything from Flint?