The Water Treatment Plant is a state-of-the-art ozone treatment plant designed to treat a maximum of 16 million gallons per day.  The treatment plant utilizes ozone for primary disinfection and chlorination as secondary disinfection.  The water treatment plant provides citizens and businesses in San Luis Obispo with clean, safe, aesthetically pleasing drinking water 24/7/365.  Please visit the pages below to learn more about the treatment plant and the water treatment process.