Just remember that Berliners get their drinking water filtered from below the banks of the river havel. Draining anyplace versus medical emergency is some interesting question to debate about. Prost.
How much fuel was dumped at which altitude exactly where? Today the tab water tastes as bad/good as any time. When you throw a match into it, it would not ignite so I guess everything is fine. After all it was French fuel, so it should taste quite good :-)