San Diego County has built up its water infrastructure to the point it can now sell excess capacity to nearby states. Following a long drought in the 1990s, the San Diego County Water Authority (SDCWA) built the massive Carlsbad Desalination Plant, expanded its reservoir and acquired rights to a Colorado River allocation. Today, with desalinated water to spare, SDCWA is negotiating a swap of its Colorado River rights to Arizona and Nevada, providing the “parched” states with an “unconventional lifeline,” said The Wall Street Journal.