San Diego imports about 90 percent of its water and big issues such as global warming and small issues such as tiny smelt make the situation perilous. Slowly, residents seem to be grasping the crisis. A poll by San Diego Institute for Policy Research and CERC indicates tht two-thirds of citizens see the water crisis as extremely or very important. However, the concept of treating wastewater to drinking water standards is acceptable to only 44 percent and unacceptable to about half of residents. The "toilet-to-tap" designation of several years ago still bites hard. But when San Diegans are told they are already drinking treated wastewater from the Colorado River, more than 60 percent support the concept. Desalination remains most popular now.