Since 2011, the City's demonstration Pure Water Facility has been open for free public tours. Taking a tour is a great way to not only learn more about water purification, but also to see the state-of-the-art technology up close. Tours last about an hour and involve a presentation and a walking tour of the facility. You must register in advance here.
North City Water Reclamation Plant
4949 Eastgate MallSan Diego, CA 92121