Water Treatment Plants
The City of San Diego has three water treatment plants that utilize several treatment processes to provide safe drinking water to the public. The plants are managed by the Water Operations Branch of the City's Public Utilities Department. In an effort to increase and improve security, the City no longer offers tours at its water treatment plants; however, the City does conduct public tours of its wastewater facilities. To find out which treatment plant produces water for your area, see the map on the Frequently Asked Questions page.
When the Alvarado Water Treatment Plant began operation in 1951, it replaced old water treatment plants at University Heights and Chollas Heights.
Located adjacent to Murray Reservoir, Alvarado today provides drinking water to customers in the central section of the City.
Plant capacity is 120 million gallons of treated drinking water per day.
A multi-phase expansion and upgrade project for the plant was completed in 2011 and included a 1.1 megawatt solar power system. Alvarado is also home to the City's Water Quality Laboratory, which continuously monitors the City's drinking water to make sure it is always safe and meets all state and federal health standards.
Miramar Water Treatment Plant began operation in 1962. The plant provides drinking water to an estimated 500,000 customers in the northern section of the City.
Located in the Scripps Miramar Ranch community, the treatment plant is adjacent to Miramar Reservoir.
Plant capacity is 144 million gallons of treated drinking water per day. In 1998, the City began a 14-year, multi-phase expansion and upgrade project for the plant.
The Otay Water Treatment Plant began operation in 1914. The plant provides drinking water to an estimated 100,000 customers in the southern section of the City. The plant is located adjacent to Lower Otay Reservoir. The smallest of the City's three water treatment plants, Otay Water Treatment Plant's capacity is 34 million gallons of treated drinking water per day. In 2010, the City completed an expansion and upgrade project for the plant that included an 804 kilowatt (AC) solar power system.
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