I cook with it and have drank it. I do recommend a filter for the RV anyway. Also the Fort has GREAT pressure, so make sure you have a pressure regulator if hooking up your RV to the Forts Water.
As for comments about using the green hose, I'd like to add/clarify. I don't believe it's horrible to use a green hose to drink water from. (Did it MANY times as a kid) however, don't use the green hose that is already at the campsite (and connected) as you don't know where it's been or how it's been used (Maybe someone used it to "Flush" their Sewer hose?)