Extracting H2O
If it's REALLY ice, then you could easily distill 99.9% with a simple crusher and solar furnace.
If it's minerals, then maybe 90-95% with similar equipment, or 99%+ if you run it hot enough to begin melting rocks.
Implanted Solar Hydrogen - not sure, but probably as good recovery as mineralised water.
The maps look interesting - very localised concentrations in specific shadowed craters.