From 538’s Significant Digits:
$700 million
The EPA is being sued by residents and property owners of Flint, Michigan, who are asking for more than $700 million in damages related to the city’s crisis over lead in its water. [The Associated Press]
This number sounds reasonable to me. I’ve seen ordinary slip-and-fall cases asking for $40 million. (That may be an exaggeration. But maybe not that exaggerated.)