Let your grass grow longer to create a healthier root system. Water in the morning rather than in the evening. It is recommended that residents with automatic irrigation systems set them to operate between 4 a.m. and 6 a.m., when demand on the water system is low. Typically, residential lawns only need one hour of sprinkling per week to stay healthy. Water during the coolest part of the day.
Early morning is best because it reduces the amount of water lost to evaporation.
Don't worry if the grass turns brown. Lawns become dormant during hot, dry spells, but revive quickly after a good rainfall or when the weather becomes cooler. If you have just planted a lawn, contact your municipality for a lawn sprinkling permit that allows sprinkling outside of restricted times for a three-week period. Most municipalities charge a fee for this permit. Sprinkling regulations are meant to reduce water use in ways that do not cause serious economic hardship.