You're wrong. The water is probably safe, but the chance of it being unsafe is not negligible. There are a huge range of possible contaminants in that water besides tritium and radiation. And even if the only things to be worried about with that water are radioactivity and tritium levels, you're relying on agencies and companies with very vested interests to lie, to tell the truth.

I'm not saying it's definitely unsafe, but at the same time, there's a definite possibility it is.