297 billion tons of water have been found on the moon.

In the journal Nature, an article was published by Chinese scientists who studied rock samples collected by the Chang'e-5 rover. A lot of water was found in fragments of impact glass formed during the collision of the Moon with a meteorite. Which allows us to assume its presence in tons of glass available on the satellite. Specifically, for every gram - 0.002 grams of water. Which in terms of the moon as a whole gives a huge water mass.