San Diego relies on importing 85 percent of its water supply each year from the Colorado River and Sacramento Delta. But soon, that won’t be the case. The city is working on a multibillion-dollar project to purify enough wastewater to provide a third of the city’s drinking water by 2035. The city’s project, called Pure Water, will soon raise resident’s water bills by $6 to $13 a month. That story prompted another round of reminders that some San Diegans aren’t thrilled about the idea of treated sewage flowing from their taps.