The 50-mgd desalination plant at carlsbad, california is the largest seawater desalination plant in the country and the 25-mgd desalination plant at tampa bay, florida, is the second largest. Our list for desalination plants in united states is one of the most comprehensive in the industry. As of january, 2026, we have compiled data on 28 verified listings.

Context u. s. Municipal desalination facilities 50 u. s. States facilities of size greater than 0. 025 mgd a survey †but an effort to contact every facility that could be identified estimated coverage >90% of all … The figures are based on 406 municipal desalination plants identified from 1971 through 2017 of size 0. 025 mgd or greater. The plants are categorized as the following: With a full capacity of 73 million gallons per day of permeate water, it is the largest desalination plant in the us. The plant has been maintained, but largely not operated due to sufficient freshwater supplies …

The plants are categorized as the following: With a full capacity of 73 million gallons per day of permeate water, it is the largest desalination plant in the us. The plant has been maintained, but largely not operated due to sufficient freshwater supplies … Existing seawater desalination facilties 1. Moss landing power plant 2. Marina coast water district desalination plant 3. Sand city desalination plant 4. Monterey bay aquarium

Marina coast water district desalination plant 3. Sand city desalination plant 4. Monterey bay aquarium