There’s a need to use the available surface water from rivers, lakes, and reservoirs so the groundwater can replenish itself. That’s where the new Southeast Fresno Surface Water Treatment Facility comes in. … Michael Carbajal, Director of Public Utilities for the City of Fresno. says that before 2004, we used 100% groundwater to meet drinking water demand. “We’re hoping to get up over 50% meaning, 50% of our drinking water demand through surface water,” says Carbajal.