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Environment Report: The Earthquake Risk No One's Talking About

Ry Rivard, Voice of San Diego on July 08, 2019

San Diego faces a hidden earthquake threat — to its water supply.

A quake, even one so far away that nobody in San Diego feels it, could cause an emergency and force mandatory water-use restrictions. That’s because most of San Diego’s water comes from hundreds of miles away through threads of metal and concrete that connect us to distant rivers and reservoirs.

Our biggest source of water is the Colorado River, which is diverted into Southern California from the Arizona border through a 242-mile water system that includes 92 miles of tunnels.

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