An enormous water reservoir — likely the largest aquifer ... A hidden reservoir of groundwater more than twice the size of Lake Mead is buried inside the Oregon Cascades, a new study reports.

Lake Mead, the source of almost 90 percent of Southern Nevada’s water, is expected to near 2022’s historic low by the end of 2025, this month’s Bureau of Reclamation projection shows.

Scientists studying the volcanic landscape of the Cascade Range found that an aquifer has nearly three times as much water as ...

They estimate it could hold at least 81 cubic kilometers of water – or about three times the water in Lake Mead, the reservoir ... That allowed them to map the volume of the aquifer.