Since I have not tasted anything quite like this before it is impossible for me to tell you exactly what it tastes like. It just does not taste like good clean and pure water. There is a distint off taste that is not good. This taste is not there if I drink water from my tap. It also was not there before I changed to a new filter. When I changed the filter I flushed approx 4 gallons of water through the new filter. I am now going to flush an additional 5 gallons more to see if the taste improves.