You can reduce how much water you use by planting cactus and other succulents, or you can switch out your sprinkler system for a micro irrigation system.
Micro irrigation systems allow you to deliver water at various points in your garden as opposed to your entire garden. This allows you to focus your water usage at the base of plants that need water, which enables you to keep the plants you love in your garden while saving water.
You don’t need a sophisticated irrigation network to supply micro irrigation—a spigot for a hose will do. Setting up a system to feed a backyard’s worth of plant beds, shrubs, and trees takes just a few minutes of designing and a couple of hours of connecting the various components.