To serve a growing population in an area often stricken by drought, San Diego County Water Authority began investigating the potential for a desalination project along the county’s coastline, eventually identifying the Carlsbad site due to the existing seawater intake and discharge infrastructure, as well as proximity to the regional distribution system. SDCWA then engaged developer Poseidon Water to design and construct a plant and conveyance pipeline as part of a 30-year Water Purchase Agreement for up to 56,000 acre-feet per year—or approx. 18.25 billion gallons.

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