A report published by detikInet on Tuesday says the Moon contains roughly a billion tons of water. According to the outlet, that amount would be enough to sustain just one city for about 100 years.
The figure comes from detikInet's reporting, which frames the lunar water reserve as limited when measured against the needs of a single urban population over a century. The report does not detail how the water would be extracted or where on the Moon it is located.
The estimate puts a number on a resource that has drawn interest as space agencies and private companies study the Moon for future settlement. Water on the lunar surface matters for more than drinking: it can be split into oxygen and hydrogen, supporting both breathable air and rocket fuel. That makes any confirmed quantity a factor in planning long-term missions.
DetikInet's framing suggests the supply is not unlimited. A billion tons sounds large, but the outlet's comparison to one city's consumption across 100 years indicates the reserve would not stretch far if lunar settlement expands beyond a single population center.
The report does not specify whether the billion-ton figure refers to confirmed deposits or broader estimates, and it offers no breakdown by region.
What to watch next: whether further studies clarify how much of the Moon's water is accessible and how extraction would work at scale.
