Much ado in the media – water on Mars. However, when you dig into the story the water is a mile deep and unavailable for astronauts to exploit. At https://phys.org/print451740783.html … an underground lake on Mars, hiding beneath a layer of ice (and even worse, a mile under the surface). The lake is 12 miles wide – and life may exist (bacterial). The water may also be full of salts and minerals making it unfit for drinking purposes.
This appears to mirror the existence of underground water resources on Earth – and both are rocky planets. Water, it is thought, may exist right across the red planet – but deep under the ground.