"Flint water crisis could cost U.S. $300 billion", 5 March 2016

The ripple effects of the city of Flint's tainted drinking water crisis could eventually prompt water suppliers to spend more than a quarter-trillion dollars on infrastructure upgrades faster than anticipated, a leading rating agency said Friday.  Fitch Ratings said in a note that utilities are stepping up education efforts to bolster public confidence while also evaluating their existing treatment protocols to ensure water quality. Significant investment in service line replacement could be coming soon, particularly if the federal Environmental Protection Agency quickly alters existing rules to make them more stringent in the wake of Flint, the rating agency said... 

Lawyers in...[one case seek] at least $500 million from an engineering company Flint hired to put its water treatment plant into operation using Flint River water. The suit, which states the company was aware the water would be dangerous without proper anti-corrosive treatment, seeks damages for diminished property values.