I'm not sure why you are quoting this to me sir. I /know/ why its happening, because back in the day lead pipes were the norm for building homes in the US, we were unaware of the negative effects of lead ingestion at the time. When we as a country discovered the harmful effects, we passed laws to remove lead, from paint, gas, and pipes as well. The government has actually already taken more responsibility for this unfortunate situation than they are /technically/ required to do by law - because it was the right thing to do for the country's kids.
While I do agree that they should have notified the people that the new water was not being treated, I disagree that it is solely the responsibility of the government to fix the problem. It should be upon the home owner and rental owners to upgrade their plumbing and remove the lead pipes. I would /not/ be against renters suing the owners/managers of the apartment buildings for medical costs and suffering frankly, it's not like the lead pipe thing is a "new" development, we've know it is a problem for over 30 years now. If owners choose not to upgrade their house, or a house they are renting, then I'm afraid they bare the brunt of the responsibility here, not the gov. Though again, the gov. /should/ have notified the people that the "new" water was not being treated and that they should test their water so there is clearly a problem with the gov. knowing about the situation but saying nothing that needs to be investigated here, but it's not really the gov.'s fault that the homeowners didn't upgrade.
If we are going to say that lead pipes in a private home are the responsibility of the government, where does that stop? Should the government be inspecting every persons home to ensure that there are no weak spots in the floor, or is that part of the responsibility of the owner? If my homes gutter is pouring water down the house and eating away at the foundation, is that the governments responsibility or mine? If my septic system is too small for the home, is that the governments responsibility to fix or mine? There is a distinct line between government responsibility and home owner responsibility, the government should indeed put out information about hazards and such, but it is ultimately the owners responsibility to maintain their home.