James Perry of Utilis, rear, joins a crew from California American Water to hunt down a leak in the water system of Duarte, a Los Angeles suburb. Utilis’ satellite technology gives utilities the general location of water leaks. Photo courtesy of Utilis

James Perry of Utilis, rear, joins a crew from California American Water to hunt down a leak in the water system of Duarte, a Los Angeles suburb. Utilis’ satellite technology gives utilities the general location of water leaks. Photo courtesy of Utilis

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A satellite image of a city, taken with synthetic aperture radar and then treated with Utilis’ algorithm, shows areas with potential water leaks. Image courtesy of Utilis

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A synthetic aperture radar image of a city with a computer-generated diagram of water pipes overlaid in blue. Images courtesy of Utilis

The drinking water flows from a source in the mountains to the customer’s tap, but somewhere in the sprawling network of pipes, part of it disappears...

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