Largest Water Reservoir

The largest reservoir of water known to man circles a black hole 12 billion light-years away, with an estimated size of 140 trillion times that of Earth’s oceans. It is the largest and farthest reservoir of water ever detected in the universe. Unfortunately, it is located in a quasar, one of the brightest and most violent objects in the cosmos and a black hole accretion disk is probably the single worst place to try to get water from. Merely getting it out of the gravity well around the black hole would be incredibly expensive, and that's not even getting into the question of the local radiation field.