Originally Posted by hfly

KPWM. That EPA stuff that you refer to was instigated directly from Flyertalk, specifically:

http://thegate.boardingarea.com/will...safe-to-drink/

Aircraft in the US can be tested monthly, if they are tested once a year, that would be impressive, they can go years without being tested. The tanks ARE generally disinfected perhaps twice a year on average (which is way better than it used to be). In short, stay away from the tank water.