How many people have never drank water from the tank?

We have traveled through all 3 North American countries extensively by RV and always use the water from the tank. Keep it sanitized, filter it with a heavy metal, particulate filter and UV filter and its probably better than the junk they find in bottled water. A lot easier on the environment as well as a lot of water bottles end up not being recycled. Take a walk on any beach in any country and you'll see what i mean.