Next week voters will be asked to okay the largest water bond in the state's history: 3.4 billion dollars would fund a variety of projects to clean up and conserve water. Environmental groups, the City of Los Angeles, the LA Chamber of Commerce and most of the state's water suppliers say they're needed to help stave off water shortages. Tax-payers groups and farmers oppose the measure because it doesn't pay for new dams and reservoirs. KPCC's Ilsa Setziol reports.