Hey I just realized something I think may work for getting all the water you need.
I read a news article about this, and it mentioned that boiling water only increases the concetration. Then I got to thinking why that is. The conclusion I made is that the toxin remains behind while h2o evaporates.
So then that got me thinking that you should be able to distill water to safely drink.
And if this theory is correct, you could also sell that distilled water to make a little bit of profit and help others.
I think this is something you should definately look into, and figure out if it works. Because if it does then you should not have any worries about this.
Even if distilling carries a little bit of toxin in it, you should be able to distill it enough times until the toxin is harmless.
(distilling is simply boiling water and collecting the condensation into water. Water distilled leaves behind its impurities. Essentially rain water is distilled water)