Keeping a lawn lush and green requires lots of attention and even more water. To cut down on water use, consider reducing the size of your lawn area by using pebbles, stones or paving. You can also turn part of your lawn area into a productive veggie garden, from which to feed your family.
Alternatively, use tougher, low water grass rather than the more common Kikuyu. For coastal areas investigate Buffalo lawn and for inland gardens, look at Kweek.