A back lit photo of a young girl splashing in a water fountain, the sun a halo behind her.
A young girl plays in a fountain in Fountain Valley, California, about 60 miles from the Carlsbad desalination plant.
  • The largest desalination plant in the US is in San Diego.
  • Experts have said the huge costs and ecological risks mean these plants might not work nationwide.
  • Other options, such as water recycling and conservation efforts, might be better.

In the early 1990s, San Diego was dying on the vine, starved of water in a series of yearslong droughts.