You got a few responses! Most are along the lines of my first thought: there are three states of matter. My second thought: ice, water, cloud/steam/water-vapor. So perhaps there is only one kind of water, and it is liquid. If so, it may be redundant to say liquid water. But it is unambiguous, one might even say, clear.
Word games. The chemical H2O is a keystone regardless of its state. It’s chemistry, not popular usage.