What forms of water is found on mars or its moons?

Answer 1

Mars is to cold to have water. Plus its atmosphere is to thin.

Yes, but Mars does seem to have water ice at its poles. Also there is probably water under the surface, again in the form of ice.

Answer 2

On Mars, water is primarily found as ice in the polar ice caps and subsurface ice deposits. There is also evidence of liquid water in the past, such as ancient river valleys and lake beds. Martian moons like Phobos and Deimos are believed to be composed of water ice and other materials.