One way the city of Fresno and the state of California could save water is to subsidize the installation of tank-less water heaters for citizens.
Think about how much water goes down the drain while waiting for the water to get hot to wash your hands, take a shower or bath, etc. That water is wasted unless you have a bucket on hand to catch that water. How many people do that?
Our friends have installed tank-less water heaters and we have one ourselves. It really does cut down on water consumption.