Take a free tour of the largest water purification center in northern California and learn the science and technology for how we treat wastewater to its purest form! Tours will run in Chinese (10:30 a.m., 11:30 a.m., 12:30 p.m. and 1:30 p.m.), Vietnamese (10 a.m., 11 a.m., 12 p.m. and 1 p.m.) and English (All day). You must pre-register for a tour in the language of your choice in order to participate. RSVP at rsvp@valleywater.org or call 408-630-3533 for more information!