Does Your Irrigation System Have Multiple Zones?
Reduce the time a little for each zone. Even one minute less per zone helps. Irrigating slowly allows water to soak into the ground. Drip irrigation is excellent for this purpose, but lowering the water flow to sprinkler heads also works by enlarging the waterdrops, which will be closer to the ground, and lowering the zone radius. Allow irrigation to run long enough to wet soils to a depth of six inches. Deep irrigation encourages healthier root systems.
Position Your Sprinklers Correctly
Position your sprinklers so the water lands on your lawn or garden where it is needed. Try to prevent waste from water runoff into the streets, allys, gutters, ditches, rights-of-ways, and storm drainage systems.