TUCSON, AZ (Tucson News Now) - The world's most important resource, water, is vanishing at an unprecedented rate.
Groundwater is being sucked up to the surface of every continent faster than it can be replenished.
Researchers from the University of California said there is little data that shows how much water exactly is left, but they do know too much is being sucked out.
Researchers collected satellite data provided by NASA, and examined the 37 largest aquifers in the world.
They then examined the difference between photos from 2003 and 2013.
They said they believe the Arabian Aquifer in Saudi Arabia was the most stressed in the world, which is alarming for the 60 million people that rely on it for water daily.
The Indus Aquifer that stretches over India, Pakistan, China and Afghanistan, was the second most stressed.
The Murzuk-Djado Aquifer in Northern Africa was the third.
The study concluded that 21 of the 37 Aquifers have already passed their sustainability points and could only go dry if populations continue to pump water to the surface at the same rates.
Credit: UC Irvine, Groundwater aquifers and the situation each one is currently in (blue means doing well, red not well).
Groundwater supports 35 percent of humans' yearly water use.
During droughts, however, this number increases significantly.
In California for example, nearly 60 percent of people are relying on aquifers during the mega-drought they are currently experiencing.