Big Cities Are Downsizing Their Water Footprints

Forty percent or more of all water use in western US cities goes to outdoor watering of lawns, gardens, pools, and golf courses. One of the most effective urban water conservation strategies is to reduce the area of irrigated landscaping, or switching to less water-intensive vegetation.

My research group spent three years collecting water data and other information from 28 water utilities that serve a total of 23 million people in the American Southwest. The task wasn’t easy: 39 researchers were involved in collecting data from 45 different utility employees. Each of these utilities we surveyed is dependent on the Colorado River for some portion or all of their water supplies.