… Beneath the streets of America’s Finest City, are nearly 2,000 miles of asbestos concrete pipes carrying drinking water to thousands of homes. The pipes, composed of concrete and asbestos, once known as a “miracle mineral” for its durability, were installed after World War II until the mid-1980s, when the health hazards of asbestos became known. Decades later, the pipes are starting to crack and reach the end of their lifespan. Documents obtained by Team 10 show over the past decade, 440 water main breaks have occurred in the city’s asbestos pipes. That has some concerned asbestos fibers may now be leaching into the water supply.