Sorry I didn’t get back sooner. My internet connection died.

I agree that storage of water is the best approach to an emergency prep. I myself do have some jugs of water stored for that purpose. I sit high enough that flooding is not a problem however, a power outage shuts down my well. My original question was asked of me and I couldn’t answer it with certainty. That is why I came to you folks. I was not sure if any means of filtering or chemical treatment would work. I wonder if someone will be working on this issue, now that this has happened, in preparation for a similar disaster that hopefully won't happen.

BTW: The EPA has done some water sampling and posted the results here.