Gotcha. Yeah, I haven't spent much time in Arizona and just took a cursory look at the map. Satellite images definitely show a dry creek bed. In the case of hiking in that arid of regions, being prepared with enough water is incredibly important.

I've just heard of cases where people died of dehydration with water sources nearby and think it's important that people are aware of the fact that they can drink untreated water in most cases (I say most because toxic algae can kill you pretty fast so know your local situation there). I wouldn't suggest doing it regularly but it can be a reasonable risk to take in an emergency situation.