But what do you do when at the Office or when you are out and about?
The best solution I have found is the Sport Berkey Portable Water Purifier. They are NOT certified by the NSF for standards 53 & 58; and the company seems to rely more on its own hype combined with some independent testing. However, The filter's construction should remove dissolved radioactive gasses and they do seem to be a much better solution than other portable bottle or pitcher water filters. My family has been using one for over a month and we are quite satisfied with its use and convenience. By no means is it a perfect solution, but it is a cost effective risk mitigation strategy. And for any one who has ever tried to drink the tap water in Disney World, the bottle could readily pay for itself in one day at the park.
Here is the Amazon link for the Sport Berkey Water Purifier