Jimbo,
it is an ecological disaster. A dam from a Australian-owned gold mine in Romania broke or leaked, and cyanide spilled into a river which leads to the Danube. Zillions of tons of fish died, people in Romania, Serbia and Bulgaria(?) can´t use the water any more, and the wave is arriving at the Danube delta area, which is an UN protected ecosystem.
I´m personally are not in danger, but I just wondered what I would do in such a situation, if this river would be the only water source. I think the field-expidient water distillation method described above would work.
Robert