The Carlsbad Desalination Plant is the largest in the United States, and has the capacity to produce 50 million gallons of water per day, according to its website.

In 2021, as the Clean Energy Alliance began serving residential and business customers in Del Mar, Solana Beach and Carlsbad, CEA and San Diego County Water Authority officials held discussions about the CEA serving the Channelside account, according to the CEA staff report. But the water authority elected to opt out of service from the CEA, which is an option for all customers within the agency’s member cities.