The part of the CDC article about solar disinfection was interesting. I had heard something about that before but not in such detail. I use a nalgene water bag a lot of the time, which is clear and can be arranged to get a lot of sun exposure. Seems like it could be left in the sun all day, sitting on aluminum foil and be pretty well sterilized. (It also implies to me that I would be best to store my emergency earthquake water at home where it would be exposed to sun regularly, in order to keep it drinkable for longer). It also helps explain how intense high altitude sunlight shining on shallow babbling mountain brooks can make water safe to drink.
I also find it interesting that the article says that you can actually sterilize water by heating it to lower temps than boiling, though boiling is more easy to determine than say 160 degrees. Of course I'm going to try to boil it, but in an emergency of low fuel, at least one has other options.