NASA says there is water on MARS

Originally posted by pavil
I stand corrected. At least 4 objects in the solar system probably have liquid water present. You can also include our moon if you are looking at frozen water in sizable amounts. Finding big ice deposits on Mars will help in the manned exploration of it.

The initial estimate of the amount, to be determined more accurately with later observations, is 30 to 300 million metric tons (recent thinking has raised the upper limit to perhaps as high as 3 billion tons). If melted, this larger number would fill a "lake" 10 square kilometers in area (3.1 x 3.1 km) to a depth of 10 meters. Surprisingly, the North Pole region contains about 50% more ice than its southern counterpart.

SOURCE

The above description is on the moon, data gathered by Clementine and confirmed by Lunar Prospector. Below is the Martian pole