This video from the USA says about itself:
21 May 2018
The lead crises in Flint and Pittsburgh have many unfortunate parallels. Residents of both cities unknowingly drank water with high levels of the potent neurotoxin, which has long-term health consequences. The rise in lead levels was preceded in both cases by a miscalculation related to chemicals used to control corrosion in water pipes. Officials in both cities have faced criticism for their inaction and failure to alert the public. And in both places, lead levels remain dangerously high.