It advertises as using RO... i just doubt if its very good RO. Some systems only run at like 83%-90% of particles removed. And ya, RO is on the list. I'm away from home for a while though, so it's not here. The water here is so hard that it blows membranes in 1/2 the regular time. I have a feeling very few water places will be pumping out good RO for cheap. The caco3 makes the tap water foam, and i swear it percipitates if you leave a glass of it beside your bed at night.
