Brush or sweep sidewalk or driveway, instead of using water for cleaning
Washing your sidewalk or driveway with a hose can use 200 or more litres of water.
Most of the debris that is on your driveway or sidewalk is organic, and can go on your lawn or garden. Simply sweep your lawn or driveway onto your lawn. If there is a lot of organic debris (leaves for example), gather it up and put it into your compost or around your plants.