If the tragedy of Flint is to serve as an example for something, its that while the US government does test for Pb, it might be in everyone's best interest to test their own water, or at least for someone out of a group of friends in a similar area. Government is great, but with something as serious as Pb contamination, and with the prevalence of Pb pipes through out the US, a little bit of extra testing might go a long way to ensure that your health is safe with the water you use to bathe, cook, and wash clothes with.