Ocean's worth of water may be buried within Mars — but can we get to it?

[Admin]

"We haven't found any evidence for life on Mars, but at least we have identified a place that should, in principle, be able to sustain life."

Ocean's worth of water may be buried within Mars — but can we get to it? : Read more

 

[Alan_Peery]

The first paragraph cites water at a depth of 1-2 kilometres, later saying no water in the top 5km of the crust. Which is it, per this paper? Different proven (probably proven) depths at different locations?