http://www.space.com/34811-mars-ice-more-water-than-lake-superior.html

A giant deposit of buried ice on Mars contains about as much water as Lake Superior does here on Earth, a new study reports.

The ice layer, which spans a greater area than the state of New Mexico, lies in Mars’ mid-northern latitudes and is covered by just 3 feet to 33 feet (1 to 10 meters) of soil. It therefore represents a vast possible resource for future astronauts exploring the Red Planet, study team members said.

That’s the water problem solved.
It can be harvested in blocks and melted with the nuclear plant used to provide energy for the colony.
Our proposal is for a one pass cooling system for the plant at startup with the water and energy needs optimised as the colony expands.
Naturally we’ll need a junke….. a field trip to gather the necessary information…….

The whole of each of the polar areas in midsummer is water ice.

mollwollfumble said:

The whole of each of the polar areas in midsummer is water ice.

But this is in a temperate zone.

dv said:

mollwollfumble said:

The whole of each of the polar areas in midsummer is water ice.

But this is in a temperate zone.

And not covered in CO2 ice during winter.