San Diego Shares Water Surplus with Drought-Hit States

San Diego went from water crisis to water hero, and now Arizona and Nevada want in on the solution.

The San Diego County Water Authority is negotiating deals that would let Arizona and Nevada tap into its Colorado River allocation. In return, those states would cover the operating costs of the Carlsbad Desalination Plant, which pumps out 54 million gallons of fresh drinking water every single day.

This partnership exists because San Diego learned its lesson the hard way. A brutal five-year drought ending in 1992 wiped out one-third of the county's water supply. Residents watched as tanker trucks and bottled water became the only way to keep taps running.

The county refused to be caught unprepared again. Leaders built the largest seawater desalination plant in North America, raised a dam wall to store more water, and secured rights to Colorado River allocations originally meant for farming districts.

Those investments slashed San Diego's reliance on imported water from 95% to just 10%. The transformation took years and billions of dollars, but it turned a water-scarce region into one with resources to spare.

The Ripple Effect

Half a million people in Nevada and Arizona could gain access to reliable clean water through this agreement. For states watching their Colorado River shares shrink year after year, San Diego's surplus represents a lifeline.

Water Authority Board Chair Nick Serrano calls it a gamechanger for the entire Southwest. The deal proves that drought planning doesn't just protect your own community. When done right, it creates enough abundance to help your neighbors too.

The Carlsbad plant runs continuously, turning Pacific Ocean saltwater into drinking water through reverse osmosis technology. What once seemed like an expensive insurance policy now looks like the smartest investment San Diego ever made.

States that prepare for the worst can end up helping others weather their storms.