I don't know for sure, I would drink from there if I wanted to fill up my glass during the night but my boyfriend says it's disgusting, something about the water coming from a tank that could have dead rats rotting at the bottom of it, so now I don't. Don't know about the rats but I do think water from the bathroom misses some king of filtering process between tank and tap. But I may be talking bollarks and thus this answer id probably quite unhelpful, sorry! (I intended to help when I began my ramblings!)