This image is from an educational web site by David P. Stern and Mauricio Peredo. As the picture shows, the real levitation is now at your fingertips. Under normal circumstance, these are such weak forces that they are not considered significant. In vortex flow, they have a more significant effect. When passed through a strong magnetic field , oxygen molecules tend to be attracted towards the field and hydrogen molecules repulsed from the field.
Water is one atom of oxygen and two atoms of hydrogen.
The two atoms of hydrogen make it diamagnetic. Superconductors are ideal diamagnetics and completely expel magnetic fields.