Israel's Water Ninja

Amir Peleg hunches his broad, 6-foot-3-inch frame into a tunnel leading to one of several reservoirs that supply water to Jerusalem. Condensation collects on the ceiling, inches overhead, like thousands of tiny stalactites. Peleg, an entrepreneur whose self-given job title is “chief plumbing officer,” catches a droplet on his palm. “Literally every drop counts,” he says. “This is the modern-day Gihon.”

Gihon was the ancient, intermittent spring that made human settlement possible in Jerusalem circa 700 B.C. Today, fresh water sources in Israel and the surrounding region are more precious than they were in the Bronze Age. About 1 million residents continually draw water from this reservoir, which is filled by pipelines snaking from the Sea of Galilee 90 miles north. Located at the edge of Jerusalem, the reservoir is held in a massive underground vault patrolled by armed guards to keep insurgents from poisoning the supply. Thick cement walls surround a floodlit pool of water, ghostly and luminous, 40 feet deep and wider and longer than two football fields.